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Home My WebLink AboutAgenda Report - December 15, 1993 (59)r CSW OF LODi COUNCIL COMMUNICATION c4iF �� AGENDA TITLE: Traffic Resolution Amendment - Approve Speed Limits on Harney Lane, from West City Limits to East City Limits, and on Turner Road, from West City Limits to East City Limits MEETING DATE: December 15, 1993 PREPARED BY: Public Works Director RECOMMENDED ACTION: That the City Council adopt a resolution amending the Traffic Resolution #87-183 to approve speed limits on the newly annexed segments on Hamey Lane and Turner Road. BACKGROUND INFORMATION: Public Works staff recently updated engineering and traffic studies foi rive 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, it is necessary to conduct enflineenng and traffic studies every five years on "non -local" streets in order to use radar enforcement. "Non -kcal" streets are the collector and arterial streets shown on the Federal Aid System Maps. Feur of the five streets have segments which have recently been annexed into the City limits. In ordiar to use radar enforcement on the newly annexed street segm snts, it was necessary to conduct engineering and traffic: studies. The engineering and traffic studies nclude measurements of prevailing speeds by a radar survey, review of unexpected conditions to the d iver, ana accident data. Three of the five streets have no changes to existing speed limits and do not need City Council approval. These three streets are Almond Drive (30 mph), Crescent Avenue (35 mph), and Lower Sacramento Road (45 mph)/Woodhaven Lane (35 mph). One of the two street segments that needs Council apps oval is or, Hamey Lane, from the west City limits to the Woodbridge Irrigation District (WID) Canal. The City recently annexed approximately 2,200 feet west of the WID Canal. Prior to the annexation, this segment was in the San J•)aquin County's jurisdiction; however, it was not radar enforceable since there was not an engineering and traffic study performed on this street segment. The other street segment is on Turner Road, from the west City limits to 800 feet east of Lower Sacramento Road/Woodhaven Lane. The City recently annexed approximately 1,400 tees ax the west end. The recommended speed limits are based on the 85th percentile speeds observed in the field. It is not recommended to rurther reduce the speeds due to unexpected conditions or accidant data. APPROVED --- THOMAS A. PETERSON recyC60 DAM City Manager GG -1 CRCS9301.00C 1100M3 C, Traffic,Resolution Amendment - Approve Speed Limits on Harney Lane, tram West City Limits to East City Limits, and on Turner Road, from West City Limits to East City Limits December 15, 1993 Page 2 The recommended speed limits for both streets are shown on the table below and on the attached narratives and engineering and traffic surveys. There are no changes in the remaining segments of Harney Lane and Turner Road. Council approval is only necessary on the asterisked segments. Harney Lane Existino Speed Limit -West City limits to WID Canal 45 mph 'WID Canal to East City Limits 45 mph Turner Road Existino Speed limit 'West City Limits to 800 feet west of Lower 55 mph Sacramento Road/Woodhaven Lane •800 feet west of Lower Sacramento Road/ 40 mph Woodhaven Lane to Mills Avenue Mitis Avenue to Ham Lane 35 mph Ham Lane to Stockton Street 40 mph Stockton Street to East City Limits 45 mph Recommended Speed Limit 55 mph 45 mph Recommended Speed Limi! 55 mph 40 mph 35 mph 40 mph 45 mph If the City Council changes the recommended limits, those street segments will not be radar enforceable. FUNDING: Funding to be provided by the Street Maintenance Account. /er� (Jack- Ronsko blit oft Directar Prepared by Paula J. Fernandez. Associate T. --4.r- Engineer JLRTPJFAm Attachments cc: City Attorney Police Chief Street Superintendent CRESMI.oac 12oaS3 I .r NGINEERIN_g TRAFFIC SURVEY z. ( `< ^� 4ND (O SEE NARRATIVE FOR SACXGROUHD INFORMATION ( 2 "moo" �: Qs ?3op' xx�' I(6�) r ;13I 71 / I +f� I u Ii '/2: Mi _ SPEED TABLE ROADWAY WIDTH ,��' �..-,.�� _/ __.r,) }.— !p' NO OF LANES I. 2 tWS3 MEDIAN (TYPEI I. .rbNL----+�.?I✓Y,ffTTlN1K.�•-••--. .YO�/L _ TRAFFIC SIGNAL WITA ! 84.AC'r AVERAGE DIULt TRAFFIC I - 099 7400 081 SPEED - CRITICAL .65 _ - QG d 2 �$ SBI 5 a •� ----PACE(%) w?I 46_. :6 _ /7.t Fi• �3 -� 9 I R (o - 4- (i f JA d63 f? G -ei s9 - -MEDIAN .50 *% :., - �i0 41 193F:>r _ e AI _ 49 47 fG — EXISTING SPEED ZONE I NPN �ow_PvYY _ _M.0 _ PROPOSED SPEED LONE . 3r,oAv C«A�ry $j f+N --- +{ - 46 AIPAI ••--.f IEGENpI MPH SPEED j0 T -sw. uxarw. - RI -STOP SIW A21 u 1 -SPEED l U;. _ R)9 -CLO SIG. C Cs hocL asirw f 1 RNii111Ws'Aiu:I' 1 1 i I - - —-wflcaL S-eEo — �.,4 LW T Of AMA ACCIDENT PLOT YR. Z YR. ACCIDENT rATE-ACCJMILL. u -M1. ;�----- z, ;— •7"—(p -..—+..I a "..... CITY OF LODi SPEEJD I • I •n �� fw .a. `vim' "UMK wCR[S 9EPAoinAENf HARNEY LN IJN SURV ``-�� I as a 004 December 1993 SPEED ZONE REPORT - Harney 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 Seeds (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. Eight radar surveys were performed and the 85th percentile speeds ranged from 46 to 56 mph as shown below: Harney Lane Segment West City Limits - WID Canal WID Canal - Hutchins Street Hutchins Street - Stockton Street Eastbound 58 mph 48 mph 49-52 mph Westbound 56 mph 46 mph 47-48 mph Unex ected 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. Accidents - Accident records for 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 range from 2.1 to 3.6 ACC/MVM. The average city-wide accident rate is 4.1 ACC/MVM. SPEEDZ1_5/TXTW.02M l', SPEED ZONE REPORT - Harney Lane Page 2 ° CONCLUSION West City Limit to WID Canal This segment has recently been annexed by the City. A posted speed limit of 55 mph is appropriate based on the 85th percentile speeds observed in the field, unexpected conditions, and the available accident data received from the County. The County had this segment posted at 45 mph. WID Ca,,al to East City Limit In reviewing this segment, the posted speed limit could be 45 or 50 mph. As stated above, the speed limit should be established at the first five mile per hour increment below the 85th percentile. Since the 85th percentile speeds ranged between 47 and 49 mph for three of the four radar surveys, the existing posted speed of 45 mph would be appropriate. It is not recommended to further reduce the speed limits due to unexpected conditions or accident records. The existing and recommended speed limits are shown below: Harney Lane Segment Existinj Recommended West City Limit to WID Canal 45 mph 55 mph WID Canal to East City Limit 45 mph 45 mph Jack L. Ronsko Public Works Director JLR/PJF/lm ' SPEEDZI5/TXTW.02M 1 ENGINEERING 1 �l uc.Nvcr:/ AND TRAFFIC SURVEY I? j SEE NARRATIVE FORrI Fiie� yio F/umj h TZ .t BACIEGROUNO INFORMATION A,t e7 (40) r `) I is W, 2/ IL i kR bra)' �d 3 oa' C (434 ±zm• Taiad OJN /e5' Z 1Zr ter, M(z F6r a t2(/D) % (�4) ��r JA T(` TUeryF2 �cLa c ti v au�— SPEED TABLE _ ROADWAY WIDTH�- d 1.► GO'- G C' V.JGd 5) - -- -----�+ NO pF LANES ... 3 -..F�-^_—.-' ---._.. .. _...__, .. Q ��.�_ — 4 - Z _�...___... MEDIAN ITYPEI /A .9 _ TRAFFIC SIGNAL DATA 1 1(O.k%- ',i Acr 'fir _ avERAGE OAV-Y TRAFFIC "- 1 7CIOo /06YYT 15,140 III lb604fj 14650—_— ODS SPEfO-CRITICAL.d5"% wdl +%L .3/ .t/ 413 a .f0 47 Qli gal O} +rO df 40 17 - - xl 8%(;;)'ACE Zd 6.1Gl7B� X1l.A 1 4767(57) 30 (8Z) JV -41 IV 30-40014) .40 i=•6:?B S) - -_--- —MEDIAN ,50"x W,41 32 3G _ - --- _ 4 3) 79 #: 9 J3 —•_-- _ a f I f[1S 11 7E 36 3i� 1a r%ISTING SPEEO ZONE (C-4)�-�� ►- • --• -,/aAd _.i3ayw----.-tii.--- • -- ��)o� __..:. d5 N N PROPOSED SPEED ZONE --331 - &10# moi-- �'w✓ •fes GO_M N -- dTuDe ---• -.d LEGEND' MPH SPEED GRAPH I T - %"I LOCATON i- 41 -STOP R21 1 -Sot to uwr Scr. H39 —CLO S" rtl _ C-a161ALLArwN c (SCHOOL ii - — ._--••.-- ..._ �'� _ A 731) I nJ - -_—_ -.UVEA L—T 0/ wE( _. .. ... ... 1 ACCIDENT PLOT YR' YR. Pp r I_ i I 1' ' 3 1 I '/ ' 1 ACCIDENT RATE•ACC,WL. VEH-Ml. E -- 1.2 -w--L y ,l -s ;.9 �j.Pj ---.-�•F�—...�-'•"^"-^. r• ---. .-�-"�'I i I •,�� CITY OF LODI TURNER RD SPEED 'PE E °i' ES• Ar��. "" PVBLK`NGRKSOEPA4TrAEt/( SURVEY 8613004 December 1993 SPEED ZONE REPORT - Turner Road ° 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 most appropriate to facilitate the orderly movement of traffic and which 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 speeds ranged from 39 to 57 mph as shown below: Turner Road Segment West City Limits - Lower Sacr:;mento Road/ Woodhaven Lane Lower Sacramento Road/Woodhaven Lane - Mills Avenue Mills Avenue - Ham Lane Ham Lane - Stockton Street Stockton St-eet - East City Limits Unexpected Conditions Eastbound Westbound 57 mph 57 mph 40 mph 41 mph 39 mph 41 mph 40-41 mph 40-43 mph 47-48 mph 46-47 mph 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. In reviewing the area from Mills Avenue to Loma Drive, some of the south side does not have sidewalk and there is pedestrian activity from Lodi Lake Park. This is not readily apparent to drivers traveling eastbound. SPEEDZIO/TYIW.02M I SPEED ZONE REPORT - Turner Road Page Roadside development in the area consists of the Lodi Lake Park and the drive-in across the street. Due to the lack of a food vendor in the Park, there is a large number of pedestrians crossing Turner Road. There are a number of residential driveways and the Lake entrance and exit on Turner Road. Visibility from these driveways is often reduced due to on -street parking. The effects of the above are included in the recommendation to reduce the speed limit. 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 is from 0.1 ACC/MVM to 4.5 ACC/MVM. The latest average City-wide: accident rate is 4.1 ACC/MVM. The accident rate on Turner Road, from Lower Sacramento Road (north) to Ham Lane, has decreased from 4.10 ACC/MVM (1991 speed zone survey) to 2.9 ACC/MVM (current speed zone survey). The speed limit was reduced from 40 to 35 mph in 1991. ° CONCLUSION The following posted speed limits are appropriate: Turner Road Segment West City Limits - 800 feet west of Lower Sacramento Road/Woodhaven Lane 800 feet west of Lower Sacramento Road/ Woodhaven Lane - Mills Avenue Mills Avenue - Ham Lane Ham Lane - Stockton Street Stockton Street - East City Limits Posted Speed Limit 55 mph 40 mph 35 mph 40 mph 45 mph Recommended Speed Limit 55 mph 40 mph 35 mph 40 mph 45 mph West City Limits - 800 Feet West of Lower Sacramento Road/Woodhaven Lane This segment has recently been annexed into the City limits. The current posted speed limit is 55 mph which was in the County's jurisdiction. Based on the 85th percentile speeds, a 55 mph speed limit is recommended. It is not recommended to further reduce the speed limit due to unexpected conditions or accident data. SPEEDZ10/TXTW.02M SPEED ZONE REPORT - Turner Road Page 800 Feet West of Lower Sacramento Road/Woodhaven Lane - East City Limit There are no changes from the existing posted limits. On the segment between Mills Avenue and Nam Lane, it is recommended to further reduce the 85th percentile speed by five miles per hour due to unexpected conditions and accident data as mentioned above. On the other segments, the posted speed limits are based on the 85th percentile speeds. It is not recommended to further reduce the speeds due to unexpected conditions or accident data. Jack L. Ronsko Public Works Director JLR/PJF/lm SPEEDZ10/TXTW.02M RESOLUTION NO. 93-15;(. sasssazsaaasassaasaaaz A RESOLUTION OF THE LODI CITY COUNCIL APPROVING SPEED LIMITS ON HARNEY LANE, FROM WEST CITY LIMITS TO EAST CITY LIMITS, AND ON TURNER ROAD, FROM WEST CITY LIMITS TO EAST CITY LIMITS AND THEREBY AMENDING TRAFFIC RESOLUTION NO. 87-163 aasaaasaaaaaasaaasssa;s:sasaa:aaasasaasasaaaasasaeasaaasaaasaassssssasa RESOLVED, that the City Council of the City of Lodi does hereby approve speed limits on Harney Lane, from West City Limits to East City Limits, and on Turner Road, from West City Lim,ts to East City Limits as shown below: Harney Lane Exist.Speed Limit Recommended Sneed Limit West City Limits to 45 mph 55 Aph Woodbridge irrigation Canal Woodbridge Irrigation 45 mph 45 mph Canal to East City Limits Turner Road - Exist.Speed Limit Recommended Speed Limit West City Limits to 800 55 mph 55 mph feet west of Lower Sacramento Road/Woodhaven Lane 800 feet west of Lower 40 mph 40 mph Sacramento Road/Woodhaven Lane to Mills Avenue FURTHER RESOLVED, that City of Lodi Traffic Resolution 87-163, Section 7 "Speed Limita" is hereby amended by designating the speed limits on Harney Lane, from We9t City Limits to East City Limits, and on Turner Road, from West City Limits to East City Limits as set forth above. Dated: December 15, 1993 a a a ass asaaa at a ......... a ... a...... aaaa ........... a C a a=--= aaaasaaCaa I hereby certify that Resolution No. 93-152 was passed and adopted by the City Council of the City of Lodi in a regular meeting held December 15, 1993 by the following vote: Ayes: Council Members - Davenport, Mann, Pennino, Snider, Sieglock (Mayor) Noes: Council Members - None Absent: Council Members - None fifer . Perrin City Cler i 93-152 RBS93152/TXTA.01V i - • A t