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Home My WebLink AboutAgenda Report - June 5, 1996 (85)U ' <CO' • • •UNCIL COMMUNICATION �4C FOR�`Q AGENDA TITLE: Traffic Resolution Amendment - Speed Limit Surveys on Various City Streets MEETING DATE: June 5, 1996 PREPARED BY: Public Works Director RECOMMENDED ACTION: That the City Council adopt a resolution amending the Traffic Resolution #87-163 by approving the speed limit changes on four of the ten streets shown below. The streets where speed limit changes are recommended are followed by an asterisk. • Central Avenue` • Cherokee Lane* • Church Street* • Cluff Avenue • Elm Street • Holly Drive • Hutchins Street* • Pine Street • Rutledge Drive • Tokay Street BACKGROUND INFORMATION: The Public Works Department recently performed Engineering and Traffic Surveys on ten City streets. Per Section 40802(b) of the California Vehicle Code, Engineering and Traffic Surveys must be updated within a minimum of every five years on "non -local" streets. Speeds on streets on which surveys exceed five years cannot be enforced using radar. "Non -local" streets are collector and arterial streets shown on the Federal Aid System Map. Attached as Exhibit A are the results of the surveys performed. As indicated, speed limit modifications are recommended on portions of four of the ten streets surveyed. These surveys are attached in alphabetical order by street name. The surveys performed, which follow State of California Department of Transportation guidelines, include maps and written narratives for each street. The maps show physical characteristics and field data, such as roadway widths, number of through lanes, traffic controls, traffic volumes, prevailing speeds, and accident rates. 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 average citywide accident rate is 4.6 ACC/MVM. The narratives describe the data indicated in the maps and results of the survey. Three factors should be considered in determining the speed limit most appropriate to facilitate the orderly and reasonably safe movement of traffic. These factors are prevailing speeds, unexpected conditions to drivers, and accident records. 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 both reasonable and effective. Speed limits should normally be established at the first five mile per hour (mph) increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgment may indicate the need for a further reduction of five mph. SURVEY RESULTS As noted, speed limits for most of the streets studied are not recommended for changes. APPROVED: 7 �H. Dix n Flynn -- Ci Manager CSPDLN�6.DOC - 05(28M Traffic Resolution Amendment - Speed Limit Surveys on Various City Streets June 5, 1996 Page 2 The recommended speed limit changes are as follows: Central Avenue Kettleman Lane to Vine Street - Vehicle speeds recorded in this segment support a 35 mph speed limit. The accident rate of 5.2 is only slightly above the citywide average. Based on the minor disparity between accident rates, staff does not feel that continuing to enforce this segment at 30 mph is justified as this would place well over 50 percent of the drivers in violation. Based on these factors, we recommend increasing the speed limit on this segment from 30 mph to 35 mph. Vine Street to Tokay Street - Vehicle speeds recorded in this segment support a 30 mph speed limit. The accident rate of 10.0 is well above the citywide average and about the same as the 10.1 rate from the 1991 survey. Based on the continuing high accident rate in this segment, we recommend lowering the speed limit from 30 to 25 mph in this segment. Cherokee Lane Kettleman Lane to Poplar Street - Vehicle speeds recorded in the segment between Kettleman Lane and Hale Road support a 40 mph speed limit. The accident rate of 2.5 is substantially below the citywide average. Based on these factors, we recommend reducing the speed limit on this segment from 45 mph to 40 mph. Vine Street to Hale Road - This segment is also included in the survey between Kettleman Lane and Hale Road, as indicated above. During the 1991 survey, there were no existing traffic controls on the approximately one -mile segment of Cherokee Lane between Kettleman Lane and Lodi Avenue. The past survey performed indicated that a speed limit break was needed in this segment and the uncontrolled intersection of Vine Street was selected; however, changes in speed limits are usually made at major intersections where there are signals or stop controls. Since that survey, a traffic signal was installed at Hale Road. Staff recommends extending the 40 mph speed limit from Vine Street to Hale Road. Church Street Century Boulevard to Kettleman Lane - Vehicle speeds recorded in this segment support a 35 mph speed limit. These speeds have increased since the 1991 survey, possibly due to the widening performed on the southerly portion of this segment. This increase is understandable since drivers' speeds are affected by changes in roadway conditions. The accident rate of 4.2 is slightly below the citywide average and lower than the 5.9 rate from the 1991 survey. Based on the increased vehicle speeds and low accident rate, staff does not feel that continuing to enforce this segment at 30 mph is justified as this would place well over 50 percent of the drivers in violation. Based on these factors, we recommend increasing the speed limit on this segment from 30 to 35 mph. Tokay Street to Lodi Avenue - Vehicle speeds recorded in this segment support a 35 mph speed limit. The speeds recorded have increased slightly since the 1991 survey. The current accident rate of 2.6 is significantly below the citywide average and has reduced from the 6.6 rate in the previous survey. Based on the increased vehicle speeds and low accident rate, staff does not feel that continuing to enforce this segment at 30 mph is justified as this would place over 50 percent of the drivers in violation. Based on these factors, we recommend increasing the speed limit on this segment from 30 to 35 mph. Lockeford Street to Turner Road - Vehicle speeds recorded in this segment support a 35 mph speed limit. The current accident rate of 3.5 is below the citywide average and has reduced from the 5.4 rate in the 1991 survey. Based on the recorded vehicle speeds and low accident rate, staff does not feel that continuing to enforce this segment at 30 mph is justified as this would place over 50 percent of the CSPDLM96.DOC 5128/96 Traffic Resolution Amendment - Speed Limit Surveys on Various City Streets June 5, 1996 Page 3 drivers in violation. Based on these factors, we recommend increasing the speed limit on this segment from 30 to 35 mph. Hutchins Street Tokay Street to Lodi Avenue - Vehicle speeds recorded in this segment support a 35 mph speed limit. Recorded vehicle speeds have increased since the 1991 survey. The current accident rate of 1.9 is still significantly below the citywide average and has slightly increased from the 0.5 rate in the previous survey. Based on the increased vehicle speeds and low accident rate, staff does not feel that continuing to enforce this segment at 30 mph is justified as this would place over 50 percent of the drivers in violation. Based on these factors, we recommend increasing the speed limit on this segment from 30 mph to 35 mph. Vehicle speeds recorded before and after the bike lanes were installed on Hutchins Street indicate only a very slight reduction in vehicle speeds. These differences were not significant and did not affect the recommended posted speed limits. Tokay Street Lower Sacramento Road to Mills Avenue - Recorded vehicle speeds and accident rate information from the 1991 survey supported a 35 mph speed limit. However, due to objections from the residents on this segment of Tokay Street, a 30 mph speed limit was posted. Since this limit was not supported by the survey performed in 1991, the segment could not be enforced using radar. Although the current vehicle speeds recorded continue to support a 35 mph speed limit, the accident rate has increased from the 1.5 rate recorded in the 1991 survey to the current rate of 8.7. Based on the increased accident rate, staff recommends retaining the 30 mph speed limit; however, since this limit is now supported by a valid survey, the only change is this segment will now be radar enforceable. RECOMMENDATION Based on the surveys performed on ten city streets, staff recommends the following speed limit changes: STREET SEGMENT SPEED LIMIT Central Avenue Kettleman Lane to Vine Street 30 to 35 mph Vine Street to Tokay Street 30 to 25 mph Cherokee Lane Kettleman Lane to Poplar Street 45 to 40 mph Vine Street to Hale Road 35 to 40 mph Church Street Century Boulevard to Kettleman Lane 30 to 35 mph Tokay Street to Lodi Avenue 30 to 35 mph Lockeford Street to Turner Road 30 to 35 mph Hutchins Street Tokay Street to Lodi Avenue 30 to 35 mph FUNDING: Funding for costs to modify eleven speed limit signs and legends from the Street Maintenance Account at an approximate co of $1,000. J, Jack L. Ronsko blic orks Director Prepared by Rick S. Kiriu, Senior Engineering Technician Attachments cc: City Attorney City Engineer Police Chief Street Superintendent Associate Traffic Engineer CSPUM96.DOC 5128M Exhibit A Recommended Speed Limit Changes Date: May 24, 1996 Street segments where speed limits changes are recommended are shown in bold and italics. 1. Central 5. Elm Kettleman to Vine 30 to 35 mph Lower Sac to Hutchins 35 mph no change Vine to Tokay 30 to 25 mph Hutchins to Cherokee 25 mph no change Tokay to Lodi 25 mph no change Lodi to Railroad 25 mph no change S. Holly Mills to California 30 mph no change 2. Cherokee S. city limit to Kettleman 45 mph no change 7. Hutchins Kettleman to Poplar 45 to 40 mph Harney to Kettleman 45 mph no change Poplar to Vine 40 mph no change Kettleman to Tokay 35 mph no change Vine to Hale 35 to 40 mph Tokay to Lodi 30 to 35 mph Hale to Vidor 35 mph no change Lodi to Lockeford 30 mph no change Vidor to Pioneer 40 mph no change 8. Pine 3. Church Ham to Church 30 mph no change Century to Kettleman 30 to 35 mph Church to Stockton 30 mph no change Kettleman to Tokay 35 mph no change Stockton to Cherokee 30 mph no change Tokay to Lodi 30 to 35 mph Cherokee to Beckman 30 mph no change Lodi to Lockeford 30 mph no change Beckman to Cluff 40 mph no change Lockeford to Turner 30 to 35 mph Cluff to E. city limits 40 mph no change 4. Cluff 9. Rutledge Lodi to Victor 35 mph no change Elm to Tumer 30 mph no change Victor to Turner 40 mph no change 10. Tokay Lower Sac to Hutchins 30 mph no change Hutchins to Cherokee 25 mph no change 96CHANGI.XLS ENGINEERING_ i 1 2600' i 1300' 11450' I 1150• I 450' 1 400' 1 900' 1 AND TRAFFIC SURVEY F y a r N o SEE NARRATIVE FOR z a oN i ? o a o BACKGROUND INFORMATION o s c I ��Ju T7 Lv�, L�JU-ouU { : Uzv �1 �l T1I 1 RI�1i{{IIIJJJL R1 R1 R1 R1 �1 R1 I I R1 _ h h h y v Rl � R7 R1 R7 S.D.A. ELEM SCHOOL R7 Ri� R1 R1 R � � N j 1 �j 4 CENTRAL AVE. I a 1/2 MILE I 1/2 MILE 1/2 MILE SPEED TABLE ROADWAY WIDTH I 56'38'--h-50'--+-a0----------- J _ 2 _ N0. OF LANES MEDIAN (TYPE) NONE TRAFFIC SIGNAL DATA 60ACT _ 20ACT AVERAGE DAILY TRAFFIC 4300 (4440) 4585 2000 1500 OBS. SPEED-CRITICAL,85th% SB 39 36 32 31 29 NB 37 35 32 31 30 -PACE(%,) SBI 29-39 (77) 28-38 (84) 23-33 (79) 23-33 (82) 21-31 (83) _ NBI — 28-38 (74) 28-38_-(82) 24-34 (81) 23-33 (81) 21-31 (78) -MEDIAN,50th% SB 34 32 28 27 25 NB 34 31 28 27 26 E7(ISTING SPEED ZONE 30 MPH 25 MPH PROPOSED SPEED ZONE 35 MPH -h 25 MPH LEGEND M 111-14 - — T —SIGN LOCATION �T— Rl —STOP SIGN 40 I R2() —SPEED—SPEEDUMT SIGN (MPH) RI -2 —YIFAO sm c —INSTALUTMIN C rjjS 25 MPN 30—i—� --i--- NVL -2), 1R R7i)j —TRAFM SCNAL 20- — � —CRITICAL SPEED I ` � —LQ. UW OF PAGE I � .... ) 1994— _ 1995 _ VEHVEH.—MI. RR gv- yelp a r MAY 1996 1 5.2 Dr roves ar — - CNP Engineer —'— - RCE NO. 1818} }.,...I. 1 00 _... 0 1 0 11 10.0 13.1 18.9 1 0 24.1 �. CITY 0FBLIC WORKSp EPARIVIENT LODI CENTRAL AVE T jt--. i_ 1 1 10.7 SPEED ZONE SURVEY June 1996 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 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 judgment may 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: Street Segment Northbound Southbound Kettleman Lane to Vine Street 35-37 mph 36-39 mph Vine Street to Tokay Street 32 mph 31 mph Tokay Street to Lodi Avenue 31 mph 31 mph Lodi Avenue to Railroad Avenue 30 mph 29 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. Central Avenue has diagonal parking from Vine Street to Flora Street. This can cause sight distance problems for cross street traffic and exiting vehicles. This hazard is not readily apparent to the Central Avenue motorists. These factors may be a reason to consider reducing the speed limit. CENTRLSP.DOC SPEED ZONE REPORT - Central Avenue Page 2 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 rate on Central Avenue ranged from 0.0 to 24.1 ACC/MVM. The average Citywide accident rate is 4.6 ACC/MVM. ° CONCLUSION Kettleman Lane to Vine Street The 85th percentile speeds in this segment range from 35 to 39 mph. The 50th percentile speeds range from 31 to 34 mph. The accident rate of 5.2 on this segment is higher than the Citywide average but lower than the 6.5 rate from the 1991 survey. Although the rate is slightly higher than the Citywide average, the difference is minor. Based on these factors, we do not feel enforcing this segment at 30 mph is justified as this would place well over 50 percent of the drivers in violation. We recommend increasing the speed limit on this segment from 30 mph to 35 mph. Vine Street to Tokay Street The 85th percentile speed on this segment is 32 mph. The 50th percentile speed is 28 mph. The accident rate of 10.0 in this segment is significantly higher than the Citywide average and slightly lower than the 10.1 rate from the 1991 survey. Based solely on the 85th percentile speeds, the speed limit could be set at 30 mph; however, due to visibility problems for cross street traffic caused by diagonal parking and the difficulty drivers can experience backing out of these stalls, as indicated by the high accident rate, we recommend reducing the speed limit in this from 30 mph to 25 mph. Tokay Street to Lodi Avenue The 85th percentile speed on this segment is 31 mph. The 50th percentile speed is 27 mph. The accident rate of 13.1 in this segment is significantly higher than the Citywide average but lower than the 15.5 rate from the 1991 survey. Based solely on the 85th percentile speeds, the speed limit could be set at 30 mph; however, due to the high accident rate and diagonal parking along a portion of this segment, which can create visibility problems for drivers on cross streets and exiting parking stalls, we recommend retaining the 25 mph speed limit. Lodi Avenue to Railroad Avenue The 85th percentile speeds on this segment are 29 and 30 mph. The 50th percentile speeds are 25 and 26 mph. The highest accident rate of 24.1 in this CENTRLSP.DCC SPEED ZONE REPORT - Central Avenue Page 3 segment is significantly higher than the Citywide average and much higher than the 4.0 rate from the 1991 survey. The significant increase in accident rate is due to reduced traffic volume count information. The number of accidents in this high segment increased by only 1 accident over the previous survey. Based on these factors, we recommend retaining the 25 mph speed limit in these segments. The recommended speed limits are shown below: SEGMENT Kettleman Lane to Vine Street Vine Street to Tokay Street Tokay Street to Lodi Avenue Lodi Avenue to Railroad Avenue Jack L. Ronsko Public Works Director CENTRLSP.DOC POSTED SPEED LIMIT 30 mph to 35 mph 30 mph to 25 mph 25 mph (no change) 25 mph (no change) ENGINEERING II I 1750• C 1100• 1 1800, 1 1250' 1 2100• I 2000• 1100• 1200• 1400' 1 1550' 1 Is AND TRAFFIC SURVEY 1 J SEE NARRATIVE FOR I o a w r a w W BACKGROUND INFORMATION a in r N a o o u < x W E a N S N a I I R1T :1 :1 �� 1 L�ll 1+1 R NR Rl LL ;1 L. EJIG UY 99 RAMPS RI �`) I N Li N x 0 CHEROKEE LANE 1/2 MILE I 1/2 MILE - 1/2 MILE I 1/2 MILE I 1/2 MILE SPEED TABLE ROADWAY WIDTH 1 75'1 (VARIES) NO. OF LANES 1 2 4 MEDIAN (TYPE) I--NONE----i--LANDSCAPED — NONE TRAFFIC SIGNAL DATA 80ACT _ 20ACT 60ACT 20ACT 20ACT (2) _ AVERAGE DAILY TRAFFIC ' _ 11450 16700 17250 19250 (16450) 13700 _ - ----- OBS, SPEED-CRITICAL,85 th% SB 47 44 43 38 38 44 NB 48 48 45 37 38 43 _ rn -PACE %SB 40-50 (82) 35-_45 (87) 34-44 (80) _ 30-40 (84) 30-40 (87) 35-45 (72) - -- NB 38-48 (74Z 41-51 (76) 36-46 (84) 27-37 (7) _29-39 (84) 34-44 (70) _-M_E_DIAN,50th7 SBI 43 40 38 35 _ _ 35 39 Q NB 43 44 39 33 33 35 of EXISTING SPEED ZONE 45 -MPH _ _ --+--40 MPH 35 MPH _ 40 MPHR rn PROPOSED SPEED ZONE I 1 45 MPH_ I 40 MPH 35 MPH _ 40 MPH '--I LEGEND: 1 MPH I SPEED GRAPH - i T _scN LoanGN`t- o R1 -STOP SIGNG r� 1:_:_I t 7t1-�.�--�'!�_1 1 3 R2() -SP® UMW SIGN (MPH) 50 +- I I ._- R1-2 -nELD SIGN — —:H I.j ',.-__I,� .. i T 1 f { _ Y C-INSTN1A C - i 4 11.. -�� _�.I-1-�4. �_ay l 1. -'C. _ �. 1i �7.� .. T:_L I ` I.r� I it.1 tF�.+ T' 11 rrSCMODL 25 PH - r' o $IGNS.(weSA2(25), f 40`1 - TI 1 rl ilie-mATnc SIGNAL -'-'--t- 2 LUT 3D I GROIGAL SPEED I i �.. 7 7 _ z € �� T I rr u� l�- LONER MAT OF PACE I o ACCIDENT PLOT YR: 1994; 0 4 i 1 1 1 1 1 3 1 4 2 1 2 2 42 1 1 21 3 4 2 1 .-.. YR: 19951 0 21 2 1 1 1 1 1 2 1 2 11 2 421 41 3 431 11 {II{1 4 31 0_ 1 2 ACCIDENT RATE-ACC./MILL. VEH. MI. I 0 2.6 2.5 5.5 5 I 5.0 4,4 2.0 'LL oR No. Date Revision PT - --� - — APPmw! ey a — _ _ _ -_ _ __ =CITY OF LODI CHEROKEE LN SPEED _ ZONE s °''" MAY 19 6 --- - - - _ --- E N 28183 °otv PU8iJC WORKS DEPARTMENT SURVEY June 1996 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 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 judgment may indicate the need for a further reduction of five miles per hour. Twelve radar surveys were performed and the 85th percentile speeds ranged from 37 to 48 mph as shown below: Street Segment Northbound Southbound South City Limit to Century Boulevard 48 mph 47 mph Century Boulevard to Kettleman Lane 48 mph 44 mph Kettleman Lane to Hale Road 45 mph 43 mph Hale Road to Lodi Avenue 37 mph 38 mph Lodi Avenue to Victor Road 38 mph 38 mph Victor Road to Pioneer Drive 43 mph 44 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. There are a number of commercial driveways on Cherokee Lane. Visibility from these driveways is often reduced due to the on -street truck parking and landscaped median. Although this effect was not quantified to further reduce the recommended speed limit, it was considered in the overall recommendation. CHEROKSP.00C SPEED ZONE REPORT - Cherokee Lane Page 2 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 rate on Cherokee Lane ranged from 0.0 to 6.5 ACC/MVM. The average Citywide accident rate is 4.6 ACC/MVM. ° CONCLUSION South Citv Limit to Century Boulevard The 85th percentile speeds on this segment are 47 and 48 mph. The 50th percentile speed is 43 mph. There have been no accidents in this segment in the two-year survey period. Based on these factors, we recommend retaining the 45 mph speed limit in this segment. Century Boulevard to Kettleman Lane The 85th percentile speeds on this segment are 44 and 48 mph. The 50th percentile speeds are 38 and 39 mph. The accident rate of 2.6 on this segment is lower than the Citywide average. Based on the low accident rate, we recommend retaining the 45 mph speed limit on this segment. Kettleman Lane to Hale Road The 85th percentile speeds on this segment are 43 and 45 mph. The 50th percentile speeds are 38 and 39 mph. The accident rate of 2.5 on this segment is lower than the Citywide average. Based on these factors, we recommend a 40 mph speed limit in this segment. Hale Road to Lodi Avenue The 85th percentile speeds on this segment are 37 and 38 mph. The 50th percentile speeds are 33 and 35 mph. Although the accident rate of 5.5 on this segment is higher than the Citywide average, the amount is minor. Based on these factors, we do not recommend reducing the speed limit in this segment and recommend retaining the 35 mph speed limit. Lodi Avenue to Victor Road The 85th percentile speed on this segment is 38 mph. The 50th percentile speeds are 33 and 35 mph. The highest accident rate of 6.5 on this segment is higher than the Citywide average but lower than the 8.2 rate from the 1991 survey. Based on these factors, we recommend retaining the 35 mph speed limit in this segment. CHEROKSP.DOC 4.. SPEED ZONE REPORT - Cherokee Lane Page 3 Victor Road to Pioneer Drive The 85th percentile speeds on this segment are 43 and 44 mph. The 50th percentile speeds are 35 and 39 mph. The highest accident rate of 4.4 on this segment is slightly lower than the Citywide average and below the 6.6 rate from the 1991 survey. Based on these factors, we recommend retaining the 40 mph speed limit in this segment. The recommended speed limits are shown below: CHEROKEE LANE SEGMENT South City Limit to Century Boulevard Century Boulevard to Kettleman Lane Kettleman Lane to Poplar Street Poplar Street to Vine Street Vine Street to Hale Road Hale Road to Lodi Avenue Lodi Avenue to Victor Road Victor Road to Pioneer Drive Jack L. Ronsko Public Works Director CHEROKSP.DOC POSTED SPEED LIMIT 45 mph (no change) 45 mph (no change) 45 to 40 mph 40 mph (no change) 35 to 40 mph 35 mph (no change) 35 mph (no change) 40 mph (no change) ENGINEERING I 2900' 12500• 1 1400• 1 1400' 600' 1450' 1450. 1 450'1 900 2550' AND TRAFFIC SURVEY I > SEE NARRATIVE FOR F BACKGROUND INFORMATION w N J N v oo I1 Rtll R11 J R, z � Q 5 U ` T' L SII - I 1 RI RI R7' RR111 o zvl U 0 Z vri vri N o ,oi w 1^ K7' R1 I RIS 7i�.�ll� l i ��-L I ¢ mzo v R1 lu R7 R1 R1 R1-� R1 R1 R1 R1 H1 R1 r v R1 M A��o n rn'1 R1 i -n r Rt R1 R1 Rt ¢ ¢ m n OOf CHURCH STREET Y 0 I _ 1/2 MILE 1/2 MILE —� 1/2 MILE 112 MILE I 1/2 MILE -..----- SPEED TABLE ' ROADWAY WIDTH40-44' I _ _ 50' _60'-64' I 53'—I NO. OF LANES I 4 I 2-i MEDIAN (TYPE) - NONE _.._. _.,_ TRAFFIC SIGNAL DATA 60 ACT 20ACT 20SEMIACT (4) 20FIXED 60ACT AVERAGE DAILY TRAFFIC _ I 6000 _ 6500 _ _ 8100 9200 6500 OBS. SPEED-CRITICAL,SSth7 SB, 38 37 38 _37 36 34 36 _ NB, 35 37 _ 39 38 35 34 _ 35 -PACE(%') -- SB 29-39 81 29-39 (82) 31-41 (84) 29-39 (85) 28-38 (81) - 25-35 (81) 28-38(86)- NB 27-37 83) 28-38 (81) _ 32-42 (83) 3,-41 (84) 29-3 9 _ (83) 25-35 (81) 26-36 _ - -MEDIAN,50th% SB 33 32 - 34 33 32 31 - - -- _ - B 32 31 33 35 34 32 79 31 - - -- oEXIS71NG SPEED ZONE3 0 MPH I 35 MPH -- -I- 30 MPH '= PROPOSED SPEED _ZONE I 35 MPH_ 30 MPH I 35 MPH—�-I LEGEND: MPH SPEED GRAPH -T �T y T >. T -SIGN LOCATION i y--�-tl} 1 aT STOP SIGN I I I �- 1 _-,.i.r T-•- _ Ij _ az(1 -sPEm uurt smN (MPI) 40 1 :. , _��. _. ` I t 4 Y rt �. a1-2 -mw SIGN I 1111-- -�. t- I - - . -TTS T: i 1 I y. U L INSTALLATION C - �-- - �_ { _ 1. • - - -I --`� - —r SCHOOL 25 MPH T47, -• [SCHOOL I 30 - -}r _ -- -_ -.+ j . _.:_ I • I.!�I I t -TaAmc SIGNAL_i— — T GNv uMrr —-CRrtICAL SPEED 2O - I -_�r� ''-- �_ I T 1 4 `- I--' - 7{I -.�-- fiI _ t_1__ —y J.� --�- i _ ------"'---117-------- --r W-LOWER 11M1T OF PACE N ACCIDENT PLOT YR: 1994, 1 1 1 7 7 1 t 2 7 t __ 1 0 1 1 0 1 1 2 1 -1 -- � a YR: 1995 1 1 3 t 2 2 1 1 1 2 , 2 D 2 1 1 ._ --... . _ ..- -- ... _. ACCIDENT RATE-ACC./MILL VEH.-MI. 4.2 4.7 2.6 2.6 .511.2 D 4.4 3,$ �RRNo_. Date R-ision.- =p'" CITY OF LODI SPEED CHURCH ST ZONE Dta '— — — - PUBUC WORKS DEPARTMENT SURVEY June 1996 SPEED ZONE REPORT - Church 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. Prevailina 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 judgment may indicate the need for a further reduction of five miles per hour. Fourteen radar surveys were performed and the 85th percentile speeds ranged from 34 to 39 mph as shown below: Street Segment Northbound Southbound Century Boulevard to Kettleman Lane 35-37 mph 37-38 mph Kettleman Lane to Tokay Street 38-39 mph 37-38 mph Tokay Street to Lodi Avenue 34 mph 36 mph Lodi Avenue to Lockeford Street 34 mph 34 mph Lockeford Street to Turner Road 35 mph 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. The segment of Church Street from Lodi Avenue to Lockeford Street is in the downtown area. This area is commercial with high on -street parking demand and numerous driveways and alleys to private businesses and public parking areas. Activity in and out of these driveways is high. These factors may be a reason to reduce the speed limit. CHURCHSP.DOC SPEED ZONE REPORT - Church Street Page 2 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 rate ranged from 0.0 to 5.2 ACC/MVM. The average Citywide accident rate is 4.6 ACC/MVM. ° CONCLUSION Century Boulevard to Kettleman Lane The 85th percentile speeds on this segment range from 35 to 38 mph. The 50th percentile speeds range from 32 to 33 mph. The accident rate of 4.2 in this segment is slightly lower than the Citywide average and below the 5.9 rate from the 1991 survey. Based on these factors, we do not feel that continuing to enforce this segment at 30 mph is justified, as this would place well over half of the drivers in violation. We recommend increasing the 30 mph speed limit to 35 mph in this segment. Kettleman Lane to Tokav Street The 85th percentile speeds on this segment range from 37 to 39 mph. The 50th percentile speeds range from 33 to 35 mph. The accident rate of 4.7 in this segment is slightly higher than the Citywide average and has increased from the 2.5 rate from the 1991 survey. This rise in accident rate appears to be due to an increase in accidents at the intersection of Church and Vine Streets. Church Street traffic is not controlled at Vine Street. Nine of the seventeen accidents in this segment occurred at Vine Street. Excluding these accidents, the rate in this segment would drop to 2.2. Based on these factors, we recommend retaining the 35 mph speed limit in this segment. Staff will be reviewing the Vine Street intersection separately to determine any improvements that may reduce accidents. Tokav Street to Lodi Avenue The 85th percentile speeds on this segment are 34 and 36 mph. The 50th percentile speed is 32 mph. The accident rate of 2.6 on this segment is lower than the Citywide average and significantly below the 6.6 rate from the 1991 survey. Based on these factors, we do not feel that continuing to enforce this segment at 30 mph is justified, as this would place over half of the drivers in violation. We recommend increasing the 30 mph speed limit to 35 mph in this segment. CHURCHSP.DOC SPEED ZONE REPORT - Church Street Page 3 Lodi Avenue to Lockeford Street The 85th percentile speed on this segment is 34 mph. The 50th percentile speeds are 29 and 31 mph. The highest accident rate of 5.2 in these short segments is above the Citywide average but significantly lower than the 17.4 from the 1991 survey. Although the accident rate is higher than the Citywide average, the amount is minor and has reduced dramatically. Based on these factors, we do not recommend reducing the speed limit in this segment and recommend retaining the 30 mph speed limit. Lockeford Street to Turner Road The 85th percentile speeds on this segment are 35 and 36 mph. The 50th percentile speed is 31 mph. The accident rate of 3.5 on this segment is lower than the Citywide average and below the 5.4 rate from the 1991 survey. Based on these factors, we do not feel that continuing to enforce this segment at 30 mph is justified, as this would place over half of the drivers in violation. We recommend increasing the 30 mph speed limit to 35 mph in this segment. The recommended speed limits are shown below: SEGMENT Century Boulevard to Kettleman Lane Kettleman Lane to Tokay Street Tokay Street to Lodi Avenue Lodi Avenue to Lockeford Street Lockeford Street to Turner Road Jack L. Ronsko Public Works Director CHURCHSP.DOC POSTED SPEED LIMIT 30 to 35 mph 35 mph (no change) 30 to 35 mph 30 mph (no change) 30 to 35 mph ENGINEERING AND TRAFFIC SURVEY J Q N N W co Ir SEE NARRATIVE FOR o� Z r a 2 r o BACKGROUND INFORMATION aax _ �o tJ > Y o a- = m WJ Y� IO �N ) m tt „+ JJ� WRI ,o O 2250' 2800' 2500' 1400' 1350' 1600' �1 �' i 850' iR) h h h h h h h R h h h 500' R2(25) a n � � rc n rc z ¢ 450 • HUTCHINS STREET 1/2 MILE I _1/2 MILE _1 1/2 MILE_ -t__1/2 MILE MILE _L SPEED _ ROADWAY WIDTH - - 84' + 50-56' 40'----i N0. OF LANES _ _ I I _ a I 2 + 2 WY LT LANE -I- 2---{ MEDIAN (TYPE) RAISED CONCRETE (R.0}- -{ NONE R.C. NONE— -I TRAFFIC SIGNAL DATA j 80ACT 80ACT 80ACT 20ACT 20ACT BOACT AVERAGE DAILY TRAFFIC i 13000 15000 17800 11000 _ 10500 (7050) 4050 OBS. SPEED-CRITICAL,85th% SBI 47 a7 39 39 37 30 NB 46_ - 47 39 42 37 31 -PACE(%) SBI _ 40-50 (93) _ 38-48 (84)_ _ 30-40 (88) _ 31-41 (77) 29-39 (85)_,.., 21-31 (91) m - NB' 38-48 (89) 39-49 (90) --30-40 (87) _ 33-43 (78) 27-37 (81) 23 N MEDIAN,SOth% SB' 44 44 3S 34 _ _ 32 26 NB - 44 43 35 36 32 28 d EXISTING SPEED ZONE ,— 45 MPH 35 MP_H 30 MPH —; 25 1- `" PROPOSED SPEED ZONE a5 MPH + MPH H --I 25 1 _ 35 30 MP m LEGEND: MPH 'SPEED GRAPH -F=FE -mm l nON T— = RI -STOP SIGN R2() -SPEED UMR SIGN (MPH) 50 _ ( 1---�--- .I f� RI -2 -nEIM SIGN , I _ i-- I =�— — -INSTALtA110N C I `-�1-u - -� J T ti (SCNOOL 25 MfM 40 LTi 1 — _ '_ ._ I _ �'Y I ). .... '1 1 I t - RTMEFIC rwz-, - : SIGNAL -em EUrc 30 SPEED ____—iI- -CRMCK -ONER UMR OF PKK I -L ' o ACCIDENT PLOT YR: 19941 2 1 2 1 1 t 2 2 1 1 0 13 2 4` 1 2 0 YR: 19951 -- 2 ..... - _ ._t 2 _ 4 1 2 0 1 3 1 2 0 1 2 0 -- N rlR NT RATE-ACC./MILL. VEH.-MI. 2.2 1.7 1.8 0.6 1.9 5.6 2.4 6.0 0.0 I' -'i No. Date _ _ _ Reviswn ppr_ - "�- CITY OF LO D I SPEED -. --- -- - - HUTCHINS ST ZONE i a City Enginaer DONle) PUBLIC �EP�M�r SURVEY .. MAY 1996 —_--- _ ---_—" -- RcE No. 2nfa1 June 1996 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 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 judgment may indicate the need for a further reduction of five miles per hour. Twelve radar surveys were performed and the 85th percentile speeds ranged from 30 to 47 mph as shown below: Street Segment Northbound Southbound Harney Lane to Century Boulevard 46 mph 47 mph Century Boulevard to Kettleman Lane 47 mph 47 mph Kettleman Lane to Vine Street 39 mph 39 mph Vine Street to Tokay Street 42 mph 39 mph Tokay Street to Lodi Avenue 37 mph 37 mph Lodi Avenue to Lockeford Street 31 mph 30 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. The segment of Hutchins Street from Kettleman Lane to Vine Street is primarily residential with numerous cross streets and private driveways. Since parking is allowed, visibility from these driveways and cross streets can be difficult at times. These unexpected conditions may be a reason to reduce the speed limit. HUTCHNSP.DOC T.. SPEED ZONE REPORT - Hutchins Street Page 2 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 rate ranged from 0.0 to 5.6 ACC/MVM. The average Citywide accident rate is 4.6 ACC/MVM. ° CONCLUSION Hamev Lane to Century Boulevard The 85th percentile speeds on this segment are 46 and 47 mph. The 50th percentile speed is 44 mph. The accident rate of 2.2 in this segment is lower than the Citywide average and slightly higher than the 2.0 rate from the 1991 survey. Based on these factors, staff recommends retaining the 45 mph speed limit in this segment. Century Boulevard to Kettleman Lane The 85th percentile speed on this is 47 mph. The 50th percentile speeds are 43 and 44 mph. The accident rate of 1.7 is lower than the Citywide average and slightly higher than the 0.9 rate from the 1991 survey. Based on these factors, staff recommends retaining the 45 mph speed limit in this segment. Kettleman Lane to Vine Street The 85th percentile speed on this segment is 39 mph. The 50th percentile speed is 35 mph. The accident rate of 1.8 is below the Citywide average and slightly higher than the 1.5 rate from the 1991 survey. Based solely on the 85th percentile speeds, we recommend retaining the 35 mph speed limit in this segment. Vine Street to Tokav Street The 85th percentile speeds on this segment are 39 and 42 mph. The 50th percentile speeds are 34 and 36 mph. The accident rate of 0.6 is below the Citywide average and significantly lower than the 3.2 from the 1991 survey. Based solely on the 85th percentile speeds, this segment could be set at 40 mph; however, since short speed zones are not recommended unless in transition areas, we recommend retaining the 35 mph speed limit in this segment. Tokav Street to Lodi Avenue The 85th percentile speed on this segment is 37 mph. The 50th percentile speed is 32 mph. The accident rate of 1.9 is below the Citywide average and slightly higher HUTCHNSP.DOC 1. SPEED ZONE REPORT - Hutchins Street Page 3 than the 0.5 rate from the 1991 survey. Based on these factors, staff recommends increasing the speed limit from 30 to 35 mph on this segment. Lodi Avenue to Lockeford Street The 85th percentile speeds on this segment are 30 and 31 mph. The 50th percentile speeds are 26 and 28 mph. The highest accident rate of 6.0 in this segment is higher than the Citywide average but significantly lower than the 12.2 rate from the 1991 survey. Based on these factors, staff recommends retaining the speed limit of 30 mph on this segment. The recommended speed limits are shown below: HUTCHINS STREET SEGMENT Harney Lane to Century Boulevard Century Boulevard to Kettleman Lane Kettleman Lane to Vine Street Vine Street to Tokay Street Tokay Street to Lodi Avenue Lodi Avenue to Lockeford Street Jack L. Ronsko Public Works Director HUTCHNSP.DOC POSTED SPEED LIMIT 45 mph (no change) 45 mph (no change) 35 mph (no change) 35 mph (no change) 30 to 35 mph 30 mph (no change) RESOLUTION NO. 96-63 T A RESOLUTION OF THE LODI CITY COUNCIL APPROVING SPEED LIMIT CHANGES ON CENTRAL AVENUE, CHEROKEE LANE, CHURCH STREET AND HUTCHINS STREET, AND THEREBY AMENDING TRAFFIC RESOLUTION NO. 87-163 WHEREAS, 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, which are outlined in Chapter 8 of the Caltrans Traffic Manual. RESOLVED, that the City Council of the City of Lodi does hereby approve the speed limit changes on Central Avenue, Cherokee Lane, Church Street, and Hutchins Street as shown below: STREET SEGMENT SPEED LIMIT Central Avenue Kettleman Lane to Vine Street 30 to 35 mph Vine Street to Tokay Street 30 to 25 mph Cherokee Lane Kettleman lane to Poplar Street 45 to 40 mph Vine Street to Hale Road 35 to 40 mph Church Street Century Boulevard to Kettleman Lane 30 to 35 mph Tokay Street to Lodi Avenue 30 to 35 mph Lockeford Street to Turner Road 30 to 35 mph Hutchins Street Tokay Street to Lodi Avenue 30 to 35 mph FURTHER RESOLVED, that City of Lodi Traffic Resolution No. 87-163, Section 7 "Speed Limits" is hereby amended by designating speed limit changes on Central Avenue, Cherokee Lane, Church Street, and Hutchins Street as shown above. Dated: June 5, 1996 I hereby certify that Resolution No. 96-63 was passed and adopted by the City Council of the City of Lodi in a regular meeting held June 5, 1996, by the following vote: AYES: COUNCIL MEMBERS - Davenport, Mann, Pennino, Sieglock and Warner (Mayor) NOES: COUNCIL MEMBERS - None ABSENT: COUNCIL MEMBERS - None ABSTAIN: COUNCIL MEMBERS - None IFE M. PERRIN City Clerk 96-63