The URL can be used to link to this page

Home My WebLink AboutAgenda Report - June 20, 1991 (90)AGENDA T=: Amend Traffic Resolution by Approving Speed Limits on Elm Street, Lockeford Street, Mills Avenue Between Century Boulevard and Kettleman Lane, Pine Street, Tokay Street, and Woodhaven Lane MEETING DATE: June 19, 1991 PREPARED BY: Publ is Wars Director RECOMMEMDED ACIUN- That the City Council amend the traffic resolution by approving speed limits on Elm Street, Lockeford Street, Mills Avenue between Century Boulevard and Kettleman Lane, Pine Street, Tokay Street, and Woodhaven Lane. BACKGROUND r4LPAI M Public Works staff has recently updated engineering and traffic studies for 14 streets. These studies are performed following State of California Department of Transportation (Caltrans) guidelines in accordance with California Vehicle Code Section 40802. Based on the Vehicle Code Section 40802, in order to use radar enforcement, it is necessary to conduct engineering and traffic studies every five years on "non -local" streets. "Non -local" streets are the collector and arterial streets shown on the Federal Aid System Maps. The engineering and traffic studies include measurement of prevailing speeds by a radar survey, review of unexpected conditions to the driver and accident data. The speed limits for the 14 streets were previously adopted in July 1986. There are eight streets that have no changes to existing speed limits and do not need City Council approval (see Table 1). On some of these streets, the number of accidents has decreased from the previous surveys. On those streets, the speed limit was reduced from the 85th percentile based on accident data and/or unexpected conditions. Staff felt this means that the existing speed limit is appropriate and therefore is continuing to maintain the speed limit below the 85th percentile. This occurred on four streets: Church Street between Lockeford Street and Turner Road, Central Avenue between Tokay Street and Railroad Avenue, Holly Drive, and Rutledge Drive . In the past, City Council has not approved the speed limit based on the engineering and traffic survey on two streets. These streets are Tokay Street between Lower Sacramento Road and Ham Lane, and Mills Avenue between Century Boulevard and Kettleman Lane. They are posted at 25 mph and are not radar enforceable. Past experience has shown the 85th percentile speeds do not change even if the speed zones increase. An example of this is on Church Street between Kettleman Lane and Tokay Street. In 1986, when the posted speed limit was 30 mph, the 85th percentile speeds ranged between 35 and 37 mph. The current survey shows the 85th percentile speeds ranging between 35 and 37 mph even though the posted speed limit is 35 mph. APPROVED: THOMAS A. PETERSON Cttv Manaoer CTRAFF34/TXTW.02M (CO.COM) kb CC -1 June 12, 1991 FOM Traffic Resolution Amendment June 19, 1991 Page 2 On Tokay Street, the 85th percentile speeds have remained the same everytime it has been surveyed. In 1986, they ranged from 33 to 38 mph; in 1989, they ranged from 34 to 41 mph; and now, they are between 34 and 39 mph. A variation of 1 mph i s normal given the relatively small number of vehicles measured. Similarly, on Mills Avenue, the 85th percentile speeds remained the same since the previous survey . Staff 'requests that Council approve the speed limits indicated in Table 2. If Council changes the recommended limits, such changes will not be radar enforceable. FUNDING: Funding to be provided by the street ma' enance account. ack L. Ronsko ubli Works Director Prepared by Richard C. Prima Jr., Assistant City Engineer, and Paula J. Fernandez, Assistant Civil Engineer -Traffic JLR/PJF/mt A tt ac hment s cc: - Police Chief Street Superintendent Assi stant C iv it Engineer-Traffi c CTRAFF34/TXTW.02M (CO.COM) June 12, 1991 Table 1 Street - Segrrient Posted Speed Limit Central Avenue Kettleman Lane - Tokay Street 30 mph Tokay Street - Railroad Avenue 25 mph Cherokee Lane South City Limit - Poplar Street 45 mph Poplar Street - Vine Street 40 mph Vine Street - Victor Road 35 mph Victor Road - Pioneer Street 40 mph Church Street Century Boulevard - Kettleman Lane 30 mph Kettleman Lane - Tokay Street 35 mph Tokay Street - Turner Road 30 mph C 1 of f Avenue Lodi Avenue - Victor Road 35 mph Victor Road - Turner Road 40 mph Holly Drive Mills Avenue - Ham Lane 30 mph Han Lane - California Street 30 mph Hutchins Street Harney Lane - Kettieman Lane 45 mph Kettleman Lane - Tokay Street 35 mph Tokay Street - Lockeford Street 30 mph Lockeford Street - Holly Drive 25 mph Lower Sacramento Road South City L i m i t - Turner Road 45 mph Rut ledge Drive 30 mph CTRAFF34/TXTW.02M (CO. COM) June 12, 1991 Table 2 Street - Segment Exi sting Recormnended Bm Street Lower Sacramento Road - Hutchins Street 35 35 Hutchins Street - Cherokee Lane 30 25 Lockeford Street Mills Avenue - Church Street 35 35 Church Street - Cherokee Lane 35 30 Cherokee Lane - East City Limit 35 35 Mills Avenue Century Boulevard - Kcttleman Lane 25* 30 Pine Street Hin Lane - Bedanan Road 30 30 Bedanan Road - Cluff Avenue 40 35 Cluff Avenue - East City Limit 40 40 Tokay Street Lower Sacramento Road - Mills Avenue 25 35 Mills avenue - Ham Lane 25* 30 Hen Lane - Hutchins Street 30 30 Hutchins Street - Cherokee Lane 30 25 Woodhaven Lane 30 35 *Not radar enforceable CTRAFF34/TXTW.02M (C0. COM) June 12, 1991 ENGINERNG I �' c > 1S AND TRAFFIC SURVEY .'r SEE NARRATIVE FOR w < R BACKGROUND INFORMATION OLI 4 U v i N l r 7 " a � - ` , • T 2630' d 2aOC• T .1 isod � � � V z I, @ i it MOGNT IKG� 's r � z UA ST n Y2 KI VZ NI MI y2 MI I Mk Mt SPEEO TAE1lE ROAVNW ralDTta r-- � o Ha OF I ANES. N . MED" (TYPE) TRAFFIC Sig" DATA P AGT - 5dAGT Plxfsp iaOGT7 5400 0!p 35CX� . 2CGtiT AVERAGE IMY TRAFFIC RA 30C,D - 39 29 OBS SPEED-CRITICAL, W 50 36 29-ih VG Ilr3bt83 ?132(41 24- —vacEtx) W $ - 29-34 Um 23-a9 (64 21-31 fewZ '34 (00 _ .. �,aEpura sol wB 3 w 26 24 0 33 3 32 EXISTm SPEED ZONE 35 HPF# 35 mFti 3Q KPH •'3 NPN PROPOSED SPEED ZDHE.. LEGENO wtt.. :.: .. R2t )�-SPEEDWTSM �_� R39 -V" SWr. -• . w0 flu I ; =cornua. SPEED { ; -ia.ER L"T OF FACE ..rRr.., 4 2 ACCRIENT PLOT 1969 r r r 2 ! z t z r 1 1' ! 2 3 YR- t94o t t ! t 2 2 4:1 l IZ? ta? :£s l ; z e5•Z 12.1 AOCIDENT P1TE-ACCAALL VM- ML_ 2.2 SPEED .. N+ °?aF'. ,,,, ...,.»� "ii" M CITY OF L�DI PUBLIC WORKS DEPARTMENT sr ZONE SURVEY — June 1991 SPEED ZONE REPORT - Elm Street REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. STUDY Important factors to consider in determining the speed limit which i s most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits contorrn tote actual behavior the majority of motorists, and by meascring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the corrmuni ty, engineering judgement n y indicate the need for a further reduction of five miles per hour. Ten radar surveys were performed and the 85th percentile speeds ranged from 29 to 39 mph as shown below: Eln Street Segment Lower Sacramento Road - Hutchins Street Hutchins Street - Cherokee Lane Unexpected Conditions Eastbound 36-39 mph 29-33 mph Westbound 34-38 mph 29-33 mph NMm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, si.!�ed limits below the 85th percentile are warranted, The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrien traffic in the roadway without sidewalks. The speed east of Hutchins Street was reduced based on high number of right angle accidents not apparent to the driver as discussed in the following section. SPEEDZ05/TXTW.02M SPEED ZONE REPORT - Bm Street Page 2 Accidents Accident records o f the two most recent years were considered in determining speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment o f roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (A0:Z VM) and ranged from 2.2 to 17.2 ACC/MVM. The average city-wide accident rate was 4.7 ACC/MVM. The accident rates between Hutchins Street and Cherokee Lane were significantly higher than the average city-wide accident rate. The accident rates have also increased since the previous 1986 survey. The majority of the accidents occurred at the cross streets and were right angle accidents. This is an unexpected condition to the Bm Street motorists. For this reason, the speeds were further reduced below the 85th percentile speed. CONCLUSION Lower Sacramento Road to Hutchins Street Between Lower Sacramento Road and Hutchins Street, a posted speed limit of 35 mph is appropriate based on. the 85th percentile speeds observed in the field, unexpected conditions, and the accident data. Hutchins Street to Cherokee Lane Based solely on the 85th percentile speeds observed in the field, the posted speed limit could be 25 mph or 30 mph between Hutchins Street and Cherokee Lane. However, due to the accident data and unexpected conditions, a posted speed limit of 25 mph is appropriate. The existing and recommended speed limits are shown below: ELM STREET SEGMENT EXISTING RECOMMENDED Lower Sacramento Road - Hutchins Street 35 mph 35 mph Hutchins Street - Cherokee Lane 30 mph 25 mph Jack L. Ronsko Public Works Director SPEEDZ05/TXTW.02M i z "z s ENGINEERING �' = s m o 3 t AND TRAFFIC SURVEY _ S L 3::_ , A s S S N V N /^• qV lIY !1 U /�tF—" i g SEE NARRATIVE FOR +t v B_ACAGROUND INFORMATION °L 3 N at a %c I i �� i itir 4 Z40 F r M 2iAD m i sw F f ;oo' 1 N c x + LoGkEFOKD ST I& H 1 1 i(2 Ml I I& M I 1 �I2 ml I SPEED TABLE 5z �Y 54 ,o' 53' S6" to• �' ROADWAY wIBTN No: OF LANES y MEDIAN C YPE) - 29AGT NOUE 1 fIXf.O 2 ALT TRAFFIC 904AL DATA AVERAGE ONLY TRAFFIC 3400 400 9i0O �`� Mho Mew, 1200 OBS SPEED—CMTICAL.85 W$ - 3L• 32 40 $( 82 3i -PACE (x) we 40 i 2 2a .(19 2t- V-41 :Q 14 3(�(le17 E8, 40 'r0 11r 'J1 9A ( 19.3`1 (b5 b4 x. M y p z1 2B 35 31 29 33 2 32 Ee ;E50 35 MP:1 ExISTme SPEED ZDNE 95 MPH �" ro NP4 35 PN PROPOSED wm DDNE LEG MPH I.. :.. —stm -`- RI : v s . . r •-`. X16.' ..-R39 —VQA 96N a 9 1 C.� � . ,0.—iPAiRC StGMd• • -OTY UW =—PaMN- sPEEO .. . . --��tDMERLYTK NCE- .. -._ -•I. t .. ACCIDENT PLOT YR- -t9?!L i.. ... .. 211t 1 21 fit IY64: 3 B g ACCIDENT RAfE-A(:CJNII.L. VEHrmt II.N o.r I t•9 I'1` ' G PSF ~ «» ��«"� �� CITY OF L O D ISPEED Lm ST ZONE a PUBLIC WORKS DEPARTMENT SURVEY r; �1 n June 1991 SPEED ZONE REPORT - iockeford Street ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual . ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers , and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits con orm tote actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Twelve radar sirveys were performed and the 85th percentile ranged from 32 t o 37 mph as shown below: Lockeford Street Segment Eastbound Westbound Mills Avenue - Church Street 33-37 mph 34-37 mph Church Street - Cherokee Lane 32-38 mph 32-40 mph Cherokee Lane - East City Limit 37 mph 35 mph Unexpected Conditions Wbm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, supereievation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. A portion of the north and south side of Lockeford Street between Sacramento Street and Cherokee Lane does not have sidewalk. It is not recommended to further reduce the speed limit due to sidewalk condition; however, it was considered in the overall recommendation. However, the speed east of Church Street was reduced based on the high number of right angle accidents not apparent to the driver as discussed in the following section. SPEEDZ05/1'XTW.02M June 1991 SPEED ZONE REPORT - Rutledge Drive REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering Judgement may indicate the need for a further reduction of five miles per hour. Six radar surveys were performed and the 85th percentile speeds ranged from 32 to 36 mph. Unexpected Conditions When roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. Rutledge Drive is a residential street with a number of driveways the entire length. There are a few commercial driveways at the north end. Rutledge Drive also has horizontal curves and there's a high number of on -street parked vehicles. The combination of the curves and on -street parking can cause sight problems for residents exiting their driveways and motorists using the cross streets. This is not apparent to the Rutledge motorists. For this reason, reducing the speed limit is recommended. Accidents Accident records of the two most reient years were considered in determining the speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM). SPEEDZ04/TXTw,02M SPEED ZONE REP -ORT - Rutledge Drive Page The current accident rate is 4.4 ACC/MVM which is quite lower than 13.9 ACC/MVM calculated in the 1986 survey for this street. The average city-wide accident rate is 4.7 ACC/MVM. ° CONCLUSION - Based on the 85th percentile speeds observed in the field, the pcsted speed limit could be 30 mph or 35 mph. Since Rutledge Drive has no width change or traffic control devices such as stop or yield signs to identify separate segments, it is best to choose one speed zone for the entire street. DLP, to the described conditions not readily apparent to the driver, and the previous high accident rate, the current posted speed limit of 30 mph i s appropriate. Street Rutledge Drive Jack L. Ronsko Publ ie Wcd<s Director SPEEDZ04/TXTW.02M Posted Speed t i mi t 30 mph r• SPEED ZONE REPORT - Lockeford Street Page Accidents Accident records of the two most recent years were considered in determining speed zones. Accidents on segments of rcadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within 3 segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) and ranged from 0 to 14.3 ACC/MVM. The average city-wide accident rate is 4.7 ACC/MVM. The accident rate was the highest between Church Street and Cherokee Lane and more than three times the average accident rate. The majority of the accidents occurred at the cross streets and were right angle accidents. This is an unexpected condition to the Lockeford Street motorists. For this reason, it is appropriate to further reduce the speed limit between Church Street and Cherokee Lane. There have been six pedestrian accidents in the past four years. ° CONCLUSION Mills Avenue to Church Street A posted speed limit of 35 mph is appropridte between Mills Avenue and Church Street based on the 85th percentile speeds observed i n the field, unexpected conditions, and the accident data described above. Church Street to Cherokee Lane Based on the 85th percentile speeds observed in the field, described conditions not apparent to the drive, and accident data, the posted speed limit of 30 mph is appropriate between Church Street and Cherokee Lane. Cherokee Lane to East Citv Limit A posted speed limit of 35 mph is appropriate between Stockton Street and the east city limit in accordance with the 85th percentile speed, unexpected conditions and accident data. The table below shows the recommended speed limits: LOCKEFORD STREET SEGMENT Mills Avenue - Church Street Church Street - Cherokee Lane Cherokee Lane - East City Limit Jack L. Ronsko Public Wojks Director SPEEDZ05/TXTW.02M FXTSTTNG RECOMMENDED 35 mph 35 mph 35 mph 30 mph 35 mph 35 mph a ENGINEERING AND TRAFFIC SURVEY SEE NARRATIVE FOR V V( 1 BACKGROUND INFORMATION � f f h AVI; I Yz n l I SPEED TABLE ROAOMAY WIDTH .. .. 5L -ti F+--- 4'i' -►# rw 49' NQ OF LANES.- 2 . MEDIAN TTYP_)-.., NONE bAN pSCTaED MEDIAN .TRAFFIC SIGNAL DATA )4/A AVERAGE. DAU TRAFFIC 1600 (1-1370) 3oGV OeS SPEED-CAMCAL.eS 'S 35 3G .. ,.; .... 35 5: "-Nb 1L•sli Hi Z}-3(01 .. -MEDiM % BO -77�µ 30 91 . E%ISTWO SPEED ZONE:: i -o-- 24 MP0 —+1 iNOT NSR GNGO _ • PROPOSED SPEED ZONE, 30 MPH —H LEGEND/. MPH WEED GR" Rl..: =SmP Sial An 'e RZI -) -SPEED LWr SIGN WW- - R39.".-nELD srA —51 t CSOgOt Mw. --OTY tmrT . �.-MiK711. SPEED: UW.Of PacE ".._ .. " • .. _ . . ACCOMT PLOT YR- . A? 1 -,..YR: .ACCIDENT. RATE-ACC.PALL.VEHrMI. a. PJF - .. o.» .....-.... CITY OF LOD{ MILLS AVE SPEED ZONE °"'. V/N(' �ci �• �•'��' ��• PUBLIC WORKS DEPARTMENT L6NTURY Pvlo- rnmxMAN ll: SURVEY June 1991 SPEED ZONE REPORT - Mills Avenue - Century Boulevard to Kettleman Lane REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform to the actual behavior of the ma.iority of motorists. and by measuring motorists' speeds, one will be -able -to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the cormunity, engineering judgement may indicate the need for a further reduction of five miles per hour. Four radar surveys were performed and the 85th percentile ranged from 34 to 36 mph. Unexpected Conditions When roadside development results in traffic conflicts and unusual conditions which are not readily apparent to driven, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. Mills Avenue from Century Boulevard to Kettleman Lane has a number of driveways the entire length. It also has horizontal curves on the north end and a high number of on -street parked vehicles. The combination of the curves and on -street parking can cause sight problems for motorists exiting the cross streets or driveways. This is not apparent to the Mills Avenue motorists. For this reason, reducing the speed limit is recommended. Accidents Accident records of the two most recent years were considered in determining speed zones. Accidents on segments of.roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM). The accident rate was 8.5 ACC/MVM for this segment. The average city-wide accident rate was SPEEOZ05/TXTW.02M SPEED ZONE REPORT - Mills Avenue - Century Boulevard to Kettleman Lane Page 2 4.7 RCC/MVM. Since the accident rate i s higher than the city-wide accident rate, it is recommended to reduce the posted speed limit as stated in the conclusion. ° GCNJLL1CT - Based on the 85th percentile speeds observed in the field, the posted speed limit could be 35 mph. However, due to the unexpected conditions and the high accident rate described above, the 30 mph is recommended. The existing posted speed limit is 25 mph; however, it is not radar enforceable. Jack L. Ronsko Public Works Director SPEEDZ05/TXTW.02M ENGINEERING m j •? Y� N Z � y O W � SEE NARRATIVE FOR BACKGROUND INFORMATION N wall w a ' ,a5 xd 4 2500 IIOO R1r Bq Sp- r F X$1 inl �+RI PIN E'"5T I t y2 Hl Vim t Y2 NI Ih NI MCI OF. LANES Z MEDUW: (TYPE) NONI'a TRAFFIC SIGNAL DATA 2 ffXED (i zm�ci 'AVERAGE OAR.Y TRAFFIC TlkY) 3300 t 5450) 76co &SW 9400 085. SPEED'-CRfTICAL,I)S VI® 32 35 32 . 32 'l 40 -PACE IxT N8 z4.34 9 64 23.35(7e 28.38 44 53 . Ep L0.3 9 TM3f ri "• Tl ± •40 43 •_MEOLw x � � � EmT*41 SPEED ZONE. 37 NPNp NIH SK NRI PROPOSED SPEED ZONE 90 MN--•-+n- 33 0 1 # 40NIH " rAp" LEGEN up"GRa : "'SIGN ` j / Iwo I T tastYpM', ".�yTN •.; b, i , t . r RI ,..tt R2l' ):�sPEE: ulrr,9Glt ; R39 ':-MELD SIGN-- y C CSCII25 . aGlaaw6S.R2ttl1, I • . .. 0-TR4:IC SIfJInL.:: 1 ;tLow"u rano ACCIDEM PLOT... •.�.YRi.. ,•,.;..•.:: .,..., YR+' 199C 1 i I I 11 $ I 121 2 21'.4 I I I Z3 2 ACCIDENT. RAM-ACWLNLL VEHrML !{.I a.I a ,0 .'4r z 1 4.$ a " °"' "�• "�"'" CITY OF LOD{ PINE ST SPEED ZONE ,. °i (,•�^i _ _.__ .ct °� PUBLIC WORKS DEPARTMENT SURVEY r� SPEED ZONE REPORT - Pine Street June 1991 ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(h) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. P-revailin Speeds (85th Percentile Speeds) - Fieasonable speed limits contonn to f e actual e avio� the ^jority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Ten radar surveys were performed and the 85th percentile speed ranged from 31 t o 43 mph. Unexpected Conditions )Mm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. The speed between Stockton Street and Cherokee Lane was reduced based on the high number of right angle accidents not apparent to the driver as discussed in the following section. Accidents Accident records of the two most recent years were considered in determining speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) and ranged from 3.3 to 14.7 ACC/MVM, The accident rate between Stockton Street and Cherokee Lane is more than three times higher than the city-wide average accident rate. The majority of the accidents occurred at the cross streets and were right angle accidents. This is an unexpected condition to the Pine Street rmtorists . SPEEDZ05/TXTW.02M SPEED ZONE REPORT - Pine Street .age Hm Lane to Beecimm Road The segment between Stockton Street and Cherokee Lane could be 30 or 35 mph based on the 85th percentile. However, due to the accident data described above, a posted speed limit of 30 mph is appropriate between Hn Lane and Berl = Road. Bed,nm Road to Cluff Avenue Staff recommends reducing the existing posted speed limit between Beckman Road and Cluff Avenue from 40 mph to 35 mph. The 85th percentile speed ranged from 37 to 39 mph and there are no unexpected conditions. This is a transition zone from the easterly higher limits to the westerly lower limits. This area is undergoing development which will further reduce the 40 mph segment in the future. The accident rate is about the same as the average city-wide accident rate. Cluff Avenue to East City Limit A posted speed limit of 40 mph is recommended between Cluff Avenue and the east city limit based on the 85th percentile, unexpected conditions, and accident data. Tho recommended speed limits are shown below: PINE STREET SEGMENT E aSTIlVG RECOMMENDED Ham Lane - Bednm Road Beckman Road - Cluff Avenue Cluff Avenue - East City Limit Jack L. Ronsko Public Works Directar SPEEDZ05/TXTW.02M 30 mph 30 mph 40 mph 35 mph 40 mph 40 mph AIC SURVEY -TRAFFIC SEE NARRATIVE FOR BACKGROUND INFORMATICN �J zl oc 4 IIIY r I'y F ! i f f RI RI RI RI 1 RI oc tl Ria[ a µ JI' TO KAY ST Y2 1'(1 I Yz NI r 1I2 MI f �t HI f (/Z MI r SPEED TABLE ROADWAY WQTM 4C' .J, 40'---,)1ti 46 N • 40' Na OF LAMES I 2 MEDIAN (TYPE) wm_ TRAFFIC SIGNAL OATA ZCDAGT 2dM4 AVERAGE DAU TRAFFIC _ 7;00 5*00 1aA0 ; 550 45op 24co OBH. SPEED-CMTICAL.83 w3 -,4 _ x E5 'J� } 3? r9 1 x2 -PAC.E('L) W0�R-AJ 33i a2•�2(i9 ES u. 1 • 7[(oi 36(77 2? -34(e0 -MEDIAN x w8 33 ;2 31 3 31 EH 51 N 30 30 91- E7(15M4 SPEED ZONE 25 MPH 41471' (ADAC ENFCK:=�_ 30 NPM PROPOSED SPEED ZONE ^= MPf1 --• 3cv17M moi+ rMPH LEGEN MPH _. — — --- - -- -- — -- -- .. — -- PI R29 ) -SPEED Wrt SGN R39 -"em SIGF R ...... .. .. I- . 1- — .... .. .._ ._._ C.—«SmtiAM"— 0CH001. 25 g9tM,fwe6,F2123). —_—_crry uWr ._ .. — _ .. .. I. ' .... _ f I - - - - SPEW --,�LMT Of - - - - - - i -= - - - - -- - 1. ACCMEh� •T pfp{ YR, 9g4 t I t 1 4 2 YRS ACCO' IT RATE-ACCJMILL VOt-Mt. .Pry •T O CITY OF LODI TOKAY ST SPEED ZONE ,.... v/41 I .......... w....« cc a„ Pt}t3liC WORKS DEPARTMENT SURVEY June 1991 SPEED ZONE REPORT - Tokay Street ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual . ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be -able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Sixteen radar surveys were performed and the 85th percentile ranged from 30 to 39 mph as shown below: Tokav Street Sement Eastbound Westbound Lower Sacramento Road - Mills Avenue 37 mph 37-39 mph Mills Avenue - Ian Lane 34-35 mph 34-36 mph Hen Lane - Hutchins Street 33 mph 33 mph Hutchins Street - Cherokee Lane 31-32 mph 30 mph Unexpected Conditions VArn roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. Pie following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. The speed east of Hutchins Street was reduced based on the high number of right angle accidents not apparent to the drivers as discussed in the following section. Accidents Accident records of the two most recent years were considered in determining speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the SPEEDZ05/TXTW.02M SPE® ZONE REPORT - Tokay Street Page 2 traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) and ranged from 0 to 20.7 ACC/MVM. The average city-wide accident rate is 4.7 ACC/MVM. The accident rate between Church Street and Stockton Street i s amongst the highest rates for all the streets. It is more than four times the average accident rate. The majority of the accidents occurred at the cross streets and were right angle accidents. This i s an unexpected condition to the Tokay Street motorists. For this reason, it is appropriate to further reduce the speed limit between Church Street and Cherokee Lane. ° CONCLUSION Lower Sacramento Road to Mills Avenue Based on the 85th percentile speeds observed in the field, unexpected conditions, and accident data, a 35 mph posted speed limit is appropriate on. Tokay Street between Lower Sacramento Road and Mills Avenue. Mills Avenue to Ham Lane In reviewing the segment between Mills Avenue and Ham Lane, the posted speed limit could be 30 or 35 mph since the 85th percentile speeds ranged between 34 and 36 mph. A stated above, the speed limit should be established at the first five mile per hour increment below the 85th percentile. A 30 mph posted speed limit is appropriate between Mills Avenue and I1m Lane. A further reduction in speed limit is not needed due to unexpected conditions and accident data. Ham Lane to Mutchins Stre, t A posted speed limit of 30 mph i s appropriate between Ham Lane and Cherokee Lane based on the 85th percentile. It is not necessary to further reduce the speed due to unexpected conditions or accident data. Hutchins Street to Cherokee Lane Based on. the 85th percentile speeds observed in the field, the posted speed limit could be 30 mph between Hutchins Street and Cherokee Lane. It is appropriate to further reduce the speed limit to 25 mph due to the described unexpected conditions and accident data. A shown below, the segmer. , between tower Sacramento Road and Ham Lane is currently not radar enforceable: SPE.FDZ05/TXTW.02M r-. SPEED ZONE REPORT - Tokay Street Page 3 TOKAY STREET SEGMENT EXISTING RECOMMENDED Lower Sacramento Road - Mills Avenue 25 25 mph* mph* 35 30 ph Mills Avenue - lean Lane 30 mph 30 mph Ham Lane - Hutchins Street 30 h 25 mph Hutchins Street - Cherokee Lane Jack L. Ronsko Public Wo& Director *Not radar enforceable SPEEDZ05/TXTW.02M ' ENGINEERING AND TRAFFIC SURVEY 0 SEE NARRATIVE FOR BACKGROUND INFORMATION IQ F _— 3 ---1 sAd autulN ,. I r Vul j �LUIJTY e n Rt T 4000 40` RI { 2400• { R'r �ooD til, f KI oT• f i f h y v lu I y LOWER 5AC 9XM6.NTO XD. 1 Y7 M1 I u Yl RIEDIAN I•TYPEI U.. w SPEED TABLE J L3lp ROADWAY VA4a1/ 40 GO lot' I 40 + 3T GO JFi h °L Y � v SPEED TABLE ROADWAY VA4a1/ 40 GO lot' 3Y 40 + 3T GO 60' ' N0. OF LANES 2-.+-2u1's+ 1w LTIs - - 2 — RIEDIAN I•TYPEI NONE TRAFFIC SIGNAL DATA ACT AVERAGE DAILY TRAFFIC 1 11950 It,40D tZ.400 10000 (f-0) 0700 44M OBS SPEED-CWICAL.85 50 46 A- 410 4i +1 SIG -PACEM 5D -46(' 49 i8I 24• i5 NB 3i 44 !A-" S 30-48!44! 35 I -MEDIAN 'rL t1 qt45 N8 40 43 1 32 EXtii—M SPEED ZO77E 45 mrH PROPOSED SPEED ZDNE - 45 MPtI - 05 MPH LEGENO!.: I R -37 51p7 RZ ) =SPEED LUNI Sm R39 -Y-mo SKN C c5c"001. 25 - AT273Y+6.MfS.�1Zlb1. —QTY Live- . — --carica. SPEED W"! AA GRAPH o 1-' -F i i yp. .. .. .. 17 , , • . • .. . ACCIDENT PLAT . YR- 1409 I I I 3 I 2 r 3 YR. 1140 I2 + 7 1 +? ACCIDENT RATE-AC6/M0.L VEN: IAL _ 1 3 Z.T• a Yd F u ,.. °ice + �'- "`�" " -w..•...�PUBI •ei a« CITY OF L O D l - K WORKS DEPARTMENT LowER sAc RD i WOODHAVEN LN SPEED SURVEY,/ June 1991 SPEED ZONE REPORT - Lower Sacramento Road/Woodhaven Lane ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which i s most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five mi 1 e s per hour. Eight radar surveys were performed and the 85th percentile speeds ranged from 36 to 47 mph as shown below: Lower Sacramento Road/Woodhaven Lane Segment Northbound Southbound South City Limit - Turner Road 45-47 mph 45-47 mph Turner Road - North City Limit 36 mph 37 mph Unexpected n ions Wbm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets , commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. There are no unexpected conditions used to further reduce the speed limit. Accidents Accident records of the two most recent years should be considered when determining speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) and ranged from 1.2 to 2.6 ACC/MVM. The average city-wide accident rate is 4.7 ACC/MVM. SPEEDZ05/TXTW.02M SPEED ZONE REPORT - Lower Sacramento Road/Woodhaven Lane Page 2 T Lower Sacramento Road Based on the 85th percentile speeds, unexpected conditions and accident data, a posted speed limit of 45 mph is appropriate on Lower Sacramento Road between the south city limit and Turner Road. Woodhaven Lane In reviewing the 85th percentile speeds on Woodhaven Lane, the posted speed limit could be 35 mph. I t i s not necessary to further reduce the posted speed limit due to unexpected conditions and accident data. The 85th percentile speeds have increased from 32-33 mph (1986 survey) to 36-37 mph (1991 survey). However, the increase in speeds is most likely due to the extension of Chestnut Street and the construction of the bridge over the Woodbridge Irrigation District canal. This work was completed in the fall of 1989. Staff recommends a 35 mph posted speed limit on Woodhaven Lane as shown below: LOWER SACRAMENTO ROAD SEGHENT EXfS NG RECOMMENDED South City Limit - Turner Road WOODHAYEN LANE SEGMENT Turner Road - North City Limit Jack L. Ronsko Public Works Director SPEEDZ05/TXTW.02M 45 mph 45 mph 30 mph 35 mph ENGINEERING o Z s > AND TRAFFIC SURVEY < m u uo SEE NARRATIVE FOR H BACKGROUND INFORMATION c i i>m i h h ? r 1'pO h a ;qrx u�d F i t 5cc nG Z CriJI QAL AVo d ;� ! y2 Ht V2. HI j y2 MI SPEED TABLE ROADWAY rnoTH 2 Na OF LINES MEDIAN (TYPE) TRAFFIC SIGNAL t11TA NoNE 26 ACT DAILY TRAFFIC iwo XWERAGE 066 SPED-CLaTMAL. 50 5 3 ^' ot? -PACE M) —UEDtAN 5B 'I _57 c Zt wb 32 29 EXtST24 SPEED 2CNE 3OMPH :.51{FH PROPOSED SPEED ZDME LEGENDt MPH -i-S"UXATbM .:, RI ' -STr SKW 40 R29 I -SPEED LFAT SGM w R39 wo 6JRt251. Y ..;,. Aftra)) . : AN''Ic SIGMAI. - H6 -.--*vnCAL SPEED ---t0.ER U .T F MGE ACCOENT PLOT YR, 146° I t i! L . ! I I I t I 7.1 2 1 & 1 t Mo - I I n.7 !G.1 j I <..2 3 44 11,3 . ACCjDejT RATE-AccAA L_ VEH ML .5 SPEED CITY OF LODI ,-,Z rrFe) CENTRAL AVE ZONE PUBLICWORKS DEPARTMENT SURVEY June 1991 SPEED ZONE REPORT - Central Avenue ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform tote actual behavior ofti�jority of motorists. and by measuring motorists' speeds, can be determined a speed 'limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Ten radar surveys were performed and the 85th percentiie speeds ranged from 30 t o 37 mph. Unexpected Conditions Wm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. Central Avenue has diagonal parking fro This can cause sight distance problems exiting vehicles. This hazard i s not motorists and reducing the speed limit Acci dents in Vine Street to Flora Street. for cross street traffic and apparent to the Central Avenue is reasonable. Accident records of the two most recent years were considered when determining the speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of rcadway and the traffic volume within that segment. Accident rates are shover in accidents per million vehicle miles (ACC/MVM). The accident rates have decreased throughout Central Avenue since the previous 1986 survey as shown below: SPEEDZ04/TXTW.02M SPEED ZONE REPORT - Central Avenue Page 2 Central Avenue Segment 3986 Survey 1991 Survey Kettleman Lane to Tokay Street 9.6 - 12.6 6.5 - 10.1 Tokay Street to Rai 1 road Avenue 1.3 - 20.8 0 - 15.5 The reduction in accidents could rnm the current speed limit is appropriate. This was a factor in reducing the speed limit below the 85th percentile in some segments as stated in the conclusion. The average city-wide accident rate is 4.7 ACC/MVM, There have been four reported pedestrian accidents in the last two years on Central Avenue. ° CONCLUSION Kettleman Lane to Tokay Street Based on the 85th percentile, the posted speed could be 30 or 35 mph between Kettleman Lane and Tokay Street. A posted speed limit of 30 mph is appropriate for this segment based on the accident rate higher than average and the described conditions rot readily apparent to the driver. Tokay Street to Rai lroad Avenue In reviewing the 85th percentile, the posted speed limit could be 30 mph between Tokay Street and Railroad Avenue. Dur to the described unexpected conditions and higher than average accident rate between Tokay Street and Lodi Avenue, it is recommended to reduce the posted speed limit below the 85th percentile. Between Lodi Avenue and Railroad Avenue, the nuns of accidents has decreased. Staff feels the current 25 mph speed limit is an appropriate speed for this segment. There are no changes from the existing posted speed limits as shown below: Central Avenue Segment 1 eman Lane to Co Tokay r i1 SPEEDZ04/TXTW.02M. ar Posted Speed Limit Street 30 mph 25 mph I n, f T. v % ENGINEERING ANDTRAFFIC SURVEY i ir, v! 1 1 W LrvSE G a 5cwaoL a` y �� 1 i h,y}ri N� �•,� SEE NARRATIVE FOR J BACKGROUND INFORMATION C i i fIL N i'i Mi I /L Mi ( yz Mi 1 SPEED TABLE MAOM 99 0 ✓ rs - �9'- yn �.eS) . ROACKW fq. OF LANES i MEDWN (TYPE) Is zs fir• zd=cf z Ud 2 '. TRAFFIC SOOAL D= DAR.Y TRAFFIC (4� /S. C�-!TSJ5.700 AVERAGE DOS SPEED -Ga TIL'AL,.BS > Al_ -PacEtxi NB a7 -s? i 36-{8 '%G 27-39 ✓"'�- :;2 4Z „PJ :�.(E9I 24.g -MEHIAx /✓B 4'� 3L ro >q 40 EXWWG SPEED ZDflE .J�w+PM �.s roMfH -H PROPOSED SPEED ZONE S., LEGEN '.. MPR SPEED .T.: -SW LOCAnNq RI SMP SKO RZ(') -SPEED LVAT SGV WH R39 -eELO SK" �: �{ . ay �TRAFFK SWAft , SPEW --cKrKAL Lx�r OF ONCE 3 Z 3 2 2 ! 1- ...ACCIDENT PLOT /965 YRG ...YIN 411181, .3 3 ACCIOW RarE-ACcjmLLvEHrML 1.2 4.3 ty� I -c c bl gF CITY OF LODI SPEED CHEROKEE LN zoNE PUBLIC vK3ftK5 DEPARTMENT SURVEY ti June 1991 SPEED ZONE REPORT - Cherokee Lane REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly rovernent of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile SpeeAs. - Reasonable speed limits confiorrn to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one wi?1 be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the coffmunity, engineering judgement may indicate the need for a further reduction of five miles per hour. Twelve radar surveys were performed and the 85th percentile ranged from 33 to 48 mph as shown below: Street Segment Northbound Southbound South City Limit - Poplar Street 48 mph 44-47 mph Poplar Street - Vine Street 41 mph 41 mph Vine Street - Victor Road 35-37 mph 33-37 mph Victor Road - Pioneer Drive 42 mph 45 mph Unexpected Conditii When roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. There are a number of commercial driveways o from these driveways is often reduced due to and lands4aped median. Although this effect further reduce the recommended speed limit, overall recommendation. SPEEOZ04/TXTW.02M n Cherokee Lane. Visibility the on -street truck parking was not quantified to it was considered in the SPEED ZONE REPORT - Cherokee Lane Page 2 Accident records of the two most recent years were considered i n determining the speed zones. Accidents on segments o f roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle m i 1 es (ACC/MVM) . The accident rate ranged from 1.2 to 8.2 ACC;MVM. The average city-wide accident rate is 4.7 ACC/MVM. ° CONCLUSION - The following posted speed limits are appropriate: Cherokee Lane Seanent Posted Speed Limit South City Limit - Poplar Street 45 mph Poplar Street - Vine Street 40 mph Vine Street - Victor Road 35 mph Victor Road - Pioneer Street 40 mph There are no changes from the existing posted speed limit. The recormended posted speed limits are based on the 85th percentile speeds observed in the field and the described conditions not apparent to the drivers. It is� t recommended to further reduce the speed zones due to the accident rkmNs. A J%k L \Ronsko P udic rks Diructor SPEEDZ04/TXTW.02M 3 AVERAGE DAILY TRAFFIC 08S SPEED-CRITICAL.$S - PACE -MEDIAN » EXISTING SPEED. ZDNE SPEED ZONE LEGEND= t-SYY{LDq,TOM RI -SAW S" Ra 1 -SPEED IAT SKS• • R39 -'W.W SIGN C - Ems "oom 25 W. -S15 �>ES Ng 50 MPH '^' 35 - 5+ ZlvlJo(3!e ?i '9n 3 ;� ': 3i '.o 3o upH 7t B -a (Pi Z9 =g. (91 _3` 35 NCH ff _ _. >� - iz Z(. 81 9e2 /?¢ !N-� i4i Zte-'51. M") 31 50 .. - 955 ;-=?(= Zi -3'+ (&7 30MPN 30 M P,4PROPOSED .. -4SURVEY c ENGINEERING AND TRAFFIC SURVEY o 2 N Y a o _ o L o .yz c� I z m p 0 Z v_ n -., J 2 J F SEE NARRATIVE FOR R r U o BACKGROUND INFORMATION r T40C 466 +60 3a64,� V F Rl X50' ACCIDENT PLOT YRS 19tl 2 1 : hrh h 3 2 1YM 19 O opo n Z' ACCIDENTRATE-ACC/MdJ-VEH-MI F _ '( �(/{' CHURr H ST N �� CNURCN i II2 AI I I/t HI I II2 NI 1/7.NI I 1/Z Ht SPEED TABLE PUSIIC WORKS DEPARTMENT :3-(.4' ---rte--_6 —'^ 1 AVERAGE DAILY TRAFFIC 08S SPEED-CRITICAL.$S - PACE -MEDIAN » EXISTING SPEED. ZDNE SPEED ZONE LEGEND= t-SYY{LDq,TOM RI -SAW S" Ra 1 -SPEED IAT SKS• • R39 -'W.W SIGN C - Ems "oom 25 W. -S15 �>ES Ng 50 MPH '^' 35 - 5+ ZlvlJo(3!e ?i '9n 3 ;� ': 3i '.o 3o upH 7t B -a (Pi Z9 =g. (91 _3` 35 NCH ff _ _. >� - iz Z(. 81 9e2 /?¢ !N-� i4i Zte-'51. M") 31 50 .. - 955 ;-=?(= Zi -3'+ (&7 30MPN 30 M P,4PROPOSED .. -4SURVEY . -tMTKAL SPEED i 41 22 } r la 1 5 $ Z ACCIDENT PLOT YRS 19tl 2 1 : 1 t} ? 1 3 2 1YM 19 O Z 5 Z' ACCIDENTRATE-ACC/MdJ-VEH-MI _ '( �(/{' CNURCN PUSIIC WORKS DEPARTMENT June 1991 SPEED ZONE REPORT - Church Street ° REFERENCE - Speed zone surveys are performed in the City of Lodi fcllowing State of Cal ifcrnia Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are cutl i ned in Chapt?r 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Resonable speed limits conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one w4 l l be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at Lhe first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Twelve radar surveys were performed and the 85th percentile ranged from 33 to 37 mph as shown below: Street Segment Northbound Southbound Century Boulevard - Kettleman Lane 34-36 mph 34-35 mph Kettleman, Lane - Tokay Street 37 mph 34-36 mph Tokay Street - Turner Road 33-35 mph 33-35 mph Unexpected Conditions Ahm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. Sane of the west side does not have sidewalk from Century Boulevard to Kettleman Lane. With the combination of parked vehicles and pedestrians, this could cause an unsafe condition. This is not readily apparent to drivers traveling southbound. There are a number of cross streets and apartment complex driveways on Church Street between two roadway segnents - Century Boulevard and Kettleman Lane, and Lockeford Street and Turner Road. These roadway segments also have high on -street parking demand. This can cause sight problems which are unexpected to Church Street motorists. For this reason, it is recommended to further reduce the speed limit. SPEEDZ04/TXTW.02M SPEED ZONE REPORT - Church Street Page 2 Accidents Accident records of the two most recent years were considered in determining the speed zones. Accidents cn segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM). The accident rates ranged from 0 to 17.4 ACC/MVM. The average city-wide accident rate is 4.7 RCC/MVM. 'Ihe speeds were reduced further due to accident data for two roadway segments - Century Boulevard to Kettleman Lane and Lockeford Street to Turner Road. The current accident rate between Kettleman Lane and Century Boulevard is 5.9 ACC/MVM which is higher than the city-wide accident rate. The accident rate between Lockeford Street and Turner Road has decreased from 13.4 ACC/MVM (1986 survey) to 5.4 ACC/MVM (1991 survey) but is still slightly higher than the city-wide accident rate. The majority of the accidents occurred at the intersections and were right angle accidents. This is an unexpected condition to the Church Street motorists. It should be noted the reduction in accidents could mean the current speed limit is appropriate. This was also a factor in reducing the speed limit below the 85th percentile between Lockeford Street and Turner Road ° CONCLUSION Century Boulevard to Kettleman Lane Based on the 85th percentile speeds observed in the field, the posted speed limit could be 30 or 35 mph from Century Boulevard to Kettleman Lane. However, considering the described conditions not readily apparent to the driver and the accident data, a posted speed limit of 30 mph is appropriate. Kettleman Lane to Tokay Street Reviewing both the prevailing speeds and unexpected conditions, a posted speed limit of 35 mph is appropriate for the street segment from Kettleman Lane to Tokay Street. 'Ihe speed limit was not further reduced due to accident records. Tokay Street to Lockeford Street A posted speed limit of 30 mph is appropriate between Tokay Street and Lockeford Street based on the 85th percentile. A 30 mph speed limit is also appropriate for signal timing purposes in this segment. SPEEDZ04/TXTW.02M SPEED ZONE REPORT - i hurch Street Page 3 Lockeford Street to Turner Road From Lockeford Street to Turner Road, the 85th percentile is 35 mph. The speed was not further reduced based on the unexpected conditions described above. There was reduction in accidents from the previous survey as mentioned above and for this reason, the existing speed limit appears to be appropriate. A posted speed limit of 30 mph is appropriate for this section. There are no changes to existing speed zones as shown below: Church Street Segment Posted Sneed Limit Century Boulevard - Kettleman Lane 30 mph Kettleman Lane - Tokay Street 35 mph Tokay Stre Turner Road 30 mph ack L. Ronsko Publi Works Director ia ENGINEERING < - M. AND TRAFFIC SURVEY W p u SEE NARRATIVE FOR BACKGROUND INFORMATION ec Rao r hoo I5d e`I 7-;00, Y GLU AVE i I I/2 MI I 1/2 MI i SPEED TABLE RDADVW VAM ? van > NO. OF LANES 2 MEDIAN (TYPE) NONE TRAFFIC SIGNAL DATA N/A AVERAGE DAAY TRAFFIC 000 10000 4'000) 3200 OM SPEED -CRITICAL.85 S13 43 NO 3r 55 -PACEL%3 Nv 30 -MEDIAN % 56 =O J- N� EXISTING SPED ZONE r :5 MPp 40 MPH -- _-* PROPOSED aPEED TONE Fes---- >8 M;l� ;0 m -PA --'y IEGENo• MPH SPEED -SON LOCATOR -'" RI -STOP SIGN d I s0 -"- RZ(. I -SPEED LAT SIGN ANS — _ R39 -HELD SWA —czax ..... .. .. 'I .. [ ' 25� SIGRSfRG"a=. 0 'TACE:LC SGNSL • . --GTTLWf .. .7 --omlm SPEEO ACCIDENT PLOT YR' YR' 1940 I ACCIDENT RICE-ACCMRl. VEH: Ml. I o.."fit.. » a... L •cT� CITY OF LODI SPEED CLUFF AVE ZONE P"•;c. `' "� PUBLIC WORKS DEPARTMENT - SURVEY June 1991 SPEED ZONE REPORT - Cluff Avenue ° REFERENCE - Speed zone surveys are performed in the City of Lodi Z ollowing State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits contbrm tote actual behavior of t e majority of motorists, and by measuring motorists' speeds, one wi11 be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indictte the need for a further reduction of five miles per hour. Six radar surveys were performed and the 85th percentile ranged from 35 to 43 mph. Unexpected Condi t i o n s NMm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. There are no unexpected conditions that were used to further reduce the speed limits. Accidents Accident records of the two most recent years were considered in determining the speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) . The accident rates ranged from 1.1 to 5.9 ACC/MVM on Cluff Avenue. SPEEDZ04/TXTW.02M SPEED ZONE REPORT - Cluff Avenue age 2 CONCLUSION - Based on the 85th percentile speeds observed in the field, the posted speed limit could be 35 mph from Lodi Avenue to Vi'Aor Road and 40 mph from Victor Road to Turner Road. The speed limit was not further reduced due to accident records or conditions not apparent to the driver. The following existing posted speed limits are appropriate: Cluff Avenue Segment Posted Speed Limit Lodi Avenue to Victor Road 35 mph Victor Road to Turner Road 40 mph Ja L. Ronsko P blI rks Director SPEEDZ04/TXTW.02M ENGINEERING I .AND TRAFFIC SURVEY SEE NARRATIVE FOR BACKGROUND INFORMATION i 1/1 NI Ih NI I - SPEED TABLE �q — Na OF LANES 2 NONE M T N/A ' TRAFFIC SOUL IDRA DALY TRAFFIC i 1100 ' /NERRGE OBS SPEEQ-CRITICAL. W13 ;, 6 WP 25.35in F k EA uDY +�.. r Iia V � PACE l%) I IN. ira.< I � ;u1�llu�rON •�GkINJCiL a Hot -"y U �< , - 1/1 NI Ih NI I - SPEED TABLE �q — Na OF LANES 2 NONE NEDIAN MPE) N/A ' TRAFFIC SOUL IDRA DALY TRAFFIC 1100 ' /NERRGE OBS SPEEQ-CRITICAL. W13 ;, 6 WP 25.35in .•:9( PACE l%) I 3.- r zpZ6 ...w5N se% WO z4 31 - vp =� .� WEED ZOK - MPHEXISTING PROPOSED SPEED ZOME LEG uPN . -T -ya LOCATOR Rt :-Sroa 41GR _ �Q R2( UW SM _ R39 =vam SWA ] C .-CgCTLLAYIW25lCirN '. r . .. 0. TRA - M SKiNN. :. - . .. .. . i .. - - ._.__-0Wf1Cy. SiEEO 10- ACCIDENT PLOT YRS -. - -i:9 - 6• i 12 I - . - YR. IBRO ACCIDElTRATE-ACC/NILL VE)N: NL SPEED oIr a" CITY OF LODI HOLLY OR zoNE. 4=4—:. PUBLIC WORKS DEPARTMENT SURVEY '_1 Z__ June 1991 SPEEDZONE REPORT - Holly Drive ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. PrevailingSpeeds (85th Percentile Speeds) - Reasonable speed limits conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Four radar surveys were performed and the 85th percentile speeds ranged from 35 t o 38 mph. Unexpected Conditions VJm roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, prefile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. There are no unexpected conditions that were used to further reduce the speed limits. Accidents Accident records of the two most recent years were considered in determining speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of accidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ACC/MVM) and ranged from 0 to 8.6 ACC/MVM. The average city-wide accident rate is 4.7 ACC/MVM. The accident rates from the previous 1986 survey ranged between 0 and 23.0 ACC/MVM. The reduction in accidents could man the current speed limit is appropriate. This was a factor in reducing the speed limit below the 85th percentile in some segments as stated in the conclusion. SPEEDZ04/TXTW.02M SPEED ZONE REPORT - Holly Drive Page ° CONCLUSION - Based on the 85th percentile speeds observed in the field, the posted speed limit could be 35 mph on Holly Drive. Die to accident data, it is recommended to reduce the speed limit below the 85th percentile speed. Since the accidents have decreased, it is felt the 30 mph is appropriate. It is not recommended to further reduce the speed -1 im i t. due to unexpected conditions. Street Posted Speed Limit Holly Drive, 30 mph L. Ronsko c Wcd<s Director Na IM f.s" SPEfDZ04/TXTW.02M AND TRAFFIC SURVEY �a w� Z_4J R�gr SEENARRATIVE FOR r d d s BACKGROUND INFORMATION 4 nuc �'I 7?C.0' 3acc' 1350 It � _j' 4 e56 .1 at f a i — N -$� HUTCHINS 5T I %2 NI I j2141 1/1 ml I 1/Z.NI yzNl SPEED TABLE ROADWAY WIDTH 'r 04' • I • +ap -Ste' r H 40' -R N4 OF LANES 4 - p 2+ 2 WY I.T Lp'"o- Z MEDIAN (TYPE) -gcs czw_gLTE A.a.) matt;. --r-: a -c.4 NONE TRAFFIC SIGNAL DAM SQKf Act Act Aa AVERAGE DAILY TRAFFIC 14500 IiB00 tZ 100 VJ800 10.000 f.+50 '350 - 08S. SPEED- CHITICAL.83 N6 i -PACE(x) 50 40 31-41 2Je-lot>^� L3^3 84 NID Z - -10 2 -WT 22- r -MEDIAN 50 35 32 Z N0 41 4z S4 34 31 2r EXISTING SPEED ZONE 4SMPH 35H 30 PH �IZ51�— PROPOSED SPEED ZONE •VS MPH 55 MPH MPA LEGENQ+ ; MFM SPEED GRAPH1 Tr -Sia U)CsmR _t RI .-STOP SIGN.. ::�, R39 - 0D SIGN - le, tt�__ . -. ' -TRAFFIC. SKAAL ._ ... • . - . . --QTY LAW ��-OafNX SOEED __LDWEA LOUT OF FACE w. 1 .. .. . . ACCIDENT PLOT YR, 14 _ _1.' a T..t_.. _I. 4_.Z. $... $ T 2.. 2,.6 YRS - 1440 3 1 2 3 2 2 / t I 4 i Z 55 2 2 1 - ACCIDENT RATE-ACG/Kil VEHrML iQ 0.9 2.0 0.617_ 2 �.I .. �» 1 CITY OF LODI SPEED HUTCHNS ST I ZONE «» �.'`I' ■ er...., a» `OXY PUBLIC WORKS DEPARTMENT $IJRYEY June 1991 SPEED ZONE REPORT. - Hutchins Street ° REFERENCE - Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (Caltrans) guidelines in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY Important factors to consider in determining the speed limit which is most appropriate to facilitate the orderly movement of traffic and that is reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) - Reasonable speed limits conform tote actual behavior of the majority of motorists, and by measuring motorists' speeds, one will be able to select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five mile per hour increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgement may indicate the need for a further reduction of five miles per hour. Twelve radar surveys were performed and the 85th percentile ranged from 30 to 51 mph as shown below: Hutchins Street Segrnent Northbound Southbound Harney Lane - Kettleman Lane 45-47 mph 46-51 mph Kettleman Lane - Tokay Street 37-38 mph 3840 mph Tokay Street - Lockeford Street 30-35 mph 31-34 mph Lockeford Street - Holly Drive Die to curve, unable to measure Unexpected Conditions When roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile are warranted. The following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shoulder conditions, profile condition, intersection spacing and offsets, commercial driveway characteristics, and pedestrian traffic in the roadway without sidewalks. There are no unexpected conditions used to further reduce the speed limit. A ccidentc Accident records of the two most recent years were considered in determining the speed zones. Accidents on segments of roadways are classified by their accident rate. Accident rates are determined by the number of P.ccidents occurring within a segment of roadway and the traffic volume within that segment. Accident rates are shown in accidents per million vehicle miles (ASC/MVM) and ranged from 0.5 to 12.2 ACC/MVM. The average city-wide accident rate is 4.7 ACC/MVM. SPEEDZ04/TXTW.02M SPEED ZONE REPORT - Hutchins Street gage 2 ° CONCLUSION - Based on Lhe 85th percentile speeds observed in the field, unexpected conditions and accident data, staff recommends the following speed limits: Hutchins Street Segment Posted Speed Limit South City Limit - Kettl ema n Lane 45 mph Kettleman Lane - Tokay Street 35 mph Tokay Street - 1.3ckeford Street 30 mph Lockeford Street - Holly Drive 25 mph DE to the street configuration, speed surveys cannot be performed between Lockeford Street and Holly Drive. Since the accident rate is below the average rate, the current 25 nph posted speed limit is appropriate. In the segment between Tokay Street and Lodi Avenue, the 85th percentile speeds were 34 mph southbound and 35 mph northbound. This segment is a transition between the 30 mph and 35 mph speed zones. Since the number of accidents had decreased, it was felt the existing 30 mph is appropriate. /' XL.sko s Director SPEEDZ04/TXTW.02M 1 cnrnnUccurvn - .... �.-...-... �......^.. N i- ac lu O S K SEE NARRATIVE F `l a n ~ )UND INFORA N � a MR r h r yy5 cit F A R N M c RUTLEDGE DR. SPEED TABLE ROADWAY Warr„ R4 NQ OF LIMES 2 '� MEDIAN MPEI- NONE TRAFFIC SIGNAL. DATA 'AVERAGE N/A DAV TRAFFIC IQ OBS: SPEED -omr-u..84 24_ 3L -Pxe/xI S9 -MEW4r50 90 NS 32 29 33 EXI'ST04 SPEED ZONE 30 MPH PROPOSED SPEED TONE MPM - LEGENO� ��I,SPEED OIAPI, :1FTRI, t.. -STOP Sot I i 1 R21' I -spw tars SG* ww• R39 -MRD SIGN 0-TPAFFIC SGS-- _-dry uwsr.., , : 1 ! fi _ •- 1 ; 1 • ; i . , : _ .:/. - :.. .. _ _. i . F. 71 .. . ACCIDENT PIAT . YR- nm'. ... I r YRI .. . ACCIDENT RATE-AOC/MAL.Y -Mi, 44 �fsF — � — CITY OF LODI RUTLB E DR SPEED ZONE PUBLIC WORKS DEPARTMENT SURVEY RESOLUTION NO. 91-116 RESCLLTEON OF THE LODI CITY COUNCIL ANINM TRAFFIC RESOLUTION 87-163, AND THEREBY APPROVM SPEED LIMITS ON ELM STREET, LOCKEFORD STREET, MLLS AVENUE BETWEEN CENTURY BOULEVARD AND KETTLEMAN LANE, PINE STREET, TOKAY STREET, AND WOODHAVEN LANE RESOLVED, that the City Council of the City of Lodi does hereby amend Traffic Resolution No. 87-163, Section 7 - Speed Limits, to approve speed limits on the following streets: Street - Segment Exi st i ng Recommended ° Elm Street Hutchins Street - Cherokee Lane 30 25 ° Lockeford Street Church Street - Cherokee Lane 35 30 Mills Avenue Century Boulevard - Kettleman Lane 25 30 ° Pine Street Beckman Road - Cluff Avenue 40 35 ° Tokay Street Lower Sacramento Road M i l Is Avenue 25 35 Mills Avenue - Ilhn Lane 25 30 Hutchins Street - Cherokee Lane 30 25 ° Woodhaven Lane 30 35 sxaaxa_xaaaxa:..eoa_exx=xxaooe_e=..:caoxx=aa_-.cc.c..on_xxoco=_a_o-cx_.x..x====.aa_._=.:a==_ Dated: June 20, 1991 i hereby certify that Resolution No. 91-116 was passed and adopted by the Lodi City Council in an adjourned regular meeting held June 20, 1991 by the following vote: Ayes : Council Members - Pinkerton, Sieglock and Hinchman (Mayor) Noes : Council Members - Penni no Absent: Council Members - Snider 4. Alice M. Reimche City Clerk 91-116