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Home My WebLink AboutAgenda Report - August 20, 2008 E-1701 �1 AGENDA ITEM E CITY OF LODI COUNCIL COMMUNICATION AGENDA 'TITLE: Adopt Resolution Amending Traffic Resolution No. 97-148 by Approving Speed Limit Reduction from 50 to 40 Miles Per Hour on Turner Road between West City Limits and Evergreen Drive MEETING DATE: August 20,2008 PREPARED BY: Public Works Director RECOMMENDED ACTION: Adopt a resolution amending Traffic Resolution No. 97-148 by approving the speed limit reductionfrom 50 to 40 miles per hour (mph) on Turner Road between the west City limits and Evergreen Drive, as shown on ExhibitA. BACKGROUND INFORMATION: Staff has recently updated Engineering and Traffic Surveys on Turner Road and on Woodhaven Drive. Based on the results of the surveys, we are recommending no change to the existing 35 mph speed limit on Woodhaven Drive: however, on Turner Road, we are recommending the speed limit be reduced from 50 mph to 40 mph between the west City limits and Evergreen Drive. FISCAL IMPACT: The estimated cost to replace two speed limit signs and two speed limit legends is $600. FUNDING AVAILABLE: FY et, Account No. 3215031 Budget Manager F. Wally Satfdelin Public Works Director Prepared by Rick S. Kiriu. Senior Engineering Technician FWS/RWpmf Attachment cc: City Attorney Police Chief Streets and Drainage Manager Senior Traffic Engineer APPROVED: Blair KCity Manager K =PITRAFFICNCTurner Speed Survey 2008 doc 8/12/2008 i MM_ AND TRAFFIC SURVEY o.Eo o J o SEE NARRATIVE FOR BACKGROUND INFORMATION3a 1,200 < o 650'og 01,400' m o & 31 e v B o a�I�WI 'I TIII R, , Rt -1 �I � h h R -, RX h h ,-, --IryI h¢ �a r= Mew h �r=�rrlr=-��I ' h r-, �F ' Ri 1 .. iqI`_' ¢ ¢¢ ¢ N a ¢ 2 0 o V¢ n1.400' r c ¢ E x1,000' 2' 7,300' J 2,600' 2,300`� v ' ry v s ¢ a w' o ° -� 0 1,650' E a° 900' 900' 2,500' TURNER RD. 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE SPEED TABLE ROADWAY WIDTH NO. OF LANES 2-3w TWLTL&BL 4w/TWLTL 4+TWLTL 2 2w/TWLTL&8L MEDIAN (TYPE) NONE 12'Raised Conc NONE TRAFFIC SIGNAL DATA AVERAGE DAILY TRAFFIC OBS. SPEED-CRITICAL.85th% FF WE - -PACE% EE 35-45(77) 30-40(89) 31-41(84) 32-42(83) 36-46(83) 31-41(71) 35-45(74) 34-44(74) WE 36-46(77) 30-40(90) 29-39(85) 32-42(84) 33-43(80) 34-44(85) 35-45(79) 34-44(75) -MEDIAN,50th% EE 41 3F 35 37 Al 77 Al nn j EXISTING SPEED ZONE 55 mph(County 50 mph 140 mph 35 mph - 40 mph PROPOSED SPEED ZONI mnh(C'n f' l 40 moh R9 mnh An r,.,r,l, ` LEGEND: MPH SPEED GRAPH -SIGN LOCATION _...- R1-1 -STOP SIGN ... _ .... R2-1() -SPEED LIMIT SIGN (MPH) 50-- R1-2 -YIELD SIGN - C -ASSEMBLY C (SCHOOL 25 MPH SIGN) WZ-2 -INTERSECTION WARNING SICK 40 - W3 -5o -SPEED REDUCTION SIGN .- P-TRAFFIC SIGNAL 30- -- —� .. -CITY LIMIT i ..:. - .. —.. ..._._ _CRITICAL SPEED ..:.. _. -LOWER LIMIT OF PAGE i. ACCIDENT PLOT YR. 2006 0 ETE111 0 111 1 2 1 1 2 1 5 1 1 1 2 1 1 6 YR: 2007 1 1 1 11 1 1 21 1 1 111 1.4 3.5 2.2 ACCIDENT PATE-ACC,/MILS. VEH.—MI. 0.4 2. Q,8 2.6 °R' RSK No. 1 Dote I CH: Hevision PPS gpproved By C IlY OF LO D I TURNER R D SPEED ��TSR@Mil@6r25 . ZONE A.g.st 2008 Traffi e� Date PUBLIC WORKS DEPARTMENT W. Cit Limits to Guild Avenue y �/ SURVGI MM_ August 2008 SPEED ZONE REPORT- Turner Road 0 REFERENCE - Speed zone surveys are performed in the City of Lodi following the California MUTCD in accordance with Section 40802 (b) of the California Vehicle Code. STUDY CRITERIA - 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: Prevailinq Speeds (85th Percentile Speedsl - 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 nearest five mile per hour (mph) increment to 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. Accidents - Accident records for two 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 average Citywide accident rate is 3.4 ACC/MVM. Unexpected Conditions — Highway, traffic, and roadside conditions not readily apparent to the driver were considered. When roadside development results in traffic conflicts and unusual conditions which are not readily apparent to drivers, speed limits below the 85th percentile may be justified. Other Factors - The following factors were considered: residential density, pedestrian and bicycle safety, 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. ° STUDY RESULT Sixteen radar surveys were performed and the 85th percentile speeds ranged from 39 to 46 mph as shown below: Street Segmer t West City Limits to Lower Sacramento Rd/Woodhaven Ln Lower Sac Rd/Woodhaven Ln to Lower Sac (N) Lower Sac (N)to Mills Avenue Mills Avenue to Ham Lane Ham Lane to Church Street Church Street to Stockton Street Stockton Street to East City Limits iurner2008.doc Eastbound 45 mph 39 mph 39 mph 40 mph 45 mph 42 mph 45-46 mph Westbound 46 mph 39 mph 39 mph 42 mph 46 mph 43 mph 45-46 mph SPEED ZONE REPORT - Turner Road Page 2 West Citv Limits to Lower Sacramento Road/Woodhaven Lane The 85 percentile speeds on this segment are 45 and 46 mph. The 50`h percentile speed is 41 mph. The accident rate of 0.4 on this segment is lower than the citywide average and higher than the 0.0 rate from the 2003 study. Based solely on prevailing speeds, the speed limit could be posted at 45 mph; however, due to the continuing low accident rate and bicycle safety, we recommend a 40 mph speed limit on this segment. Lower Sacramento Road/Woodhaven Lane to Lower Sacramento Road (North) The 85th percentile speed on this segment is 39 mph. The 50th percentile speeds are 35 and 36 mph. The accident rate of 2.0 on this segment is lowerthan the citywide average and below the 4.4 rate from the 2003 survey. Based solely on prevailing speeds, the speed limit on this segment could be posted at 40 mph; however, due to the reduced accident rate at the current speed limit, we recommend retaining the 35 mph speed limit on this segment. Lower Sacramento Road (North) to Mills Avenue The 85th percentile speed on this segment is 39 mph. The 50th percentile speeds are 35 and 36 mph. The accident rate of 0.8 on this segment is below the citywide average and lower than the 1.3 rate from the 2003 survey. Based solely on prevailing speeds, the speed limit on this segment could be posted at 40 mph; however, due to the continuing low accident rate at the current speed limit, we recommend retaining the 35 mph speed limit on this segment. Mills Avenue to Ham Lane The 85th percentile speeds on this segment are 40 and 42 mph. The 50th percentile speeds are 37 and 38 mph. The accident rate of 2.6 on this segment is below the citywide average and lower than the 3.9 rate from the 2003 survey. Based solely on the prevailing speeds, the speed limit could be set at 40 mph; however, due to the reduced accident rate at the current speed limit and residential density, we recommend retaining the 35 mph speed limit on this segment. Ham Lane to Church Street The 85th percentile speeds on this segment are 45 and 46 mph. The 50th percentile speeds are 40 and 41 mph. The accident rate of 1.4 on this segment is below the citywide average and lower than the 3.6 rate from the 2003 survey. Based solely on prevailing speeds, the speed limit could be posted at 45 mph; however, due to the reduced accident rate at the current speed limit and residential density, we recommend retaining the 40 mph speed limit on this segment. Church Street to Stockton Street The 85th percentile speeds on this segment are 42 and 43 mph. The 50th percentile speeds are 37 and 38 mph. The accident rate of 3.5 on this segment is slightly higher than the citywide average and higher than the 3.2 rate from the 2003 survey. Based on prevailing speeds and reasonable accident rate at the current speed limit, we recommend retaining the 40 mph speed limit on this segment. Stockton Street East City Limits The 85th percentile speeds on this segment range from 45 to 46 mph. The 50th percentile speeds range from 40 to 41 mph. The accident rate of 2.2 on this segment is below the citywide average and slightly lower than the 2.8 rate from the 2003 survey. Based solely on prevailing speeds, the speed limit on this segment could be posted at 45 mph; however, due to the continuing low accident rate at the current speed limit and commercial driveway characteristics, we recommend retaining the 40 mph speed limit on this segment. Turner2008.doc SPEED ZONE REPORT - Turner Road Page 3 ° CONCLUSION The recommended speed limits are shown below: STREET SEGMENT West City limits to Evergreen Drive Evergreen Dr to Lower Sacramento Rd/Woodhaven Ln Lower Sacramento Rd/Woodhaven Ln to Lower Sac (N) Lower Sac (N) to Mills Avenue Mills Avenue to Ham Lane Ham Lane to Church Street Church Street to Stockton Street Stockton Street to East City Limits Paula J. Fernandez. Senior Traffic Engineer Turner2008.doc POSTED SPEED LIMIT 50 to 40 mph 40 mph (no change) 35 mph (no change) 35 mph (no change) 35 mph (no change) 40 mph (no change) 40 mph (no change) 40 mph (no change) (o L E r =3 au U 4 aa.�BJGA3 J CD X11 ^/ L L V O O O O O co U N cA O O C6 W E .5 G O � s� -0 '`�� 'aa Neo uaploE) � 70 O• O � cn O CL 0 I..L RESOLUTION NO. 2008-171 A RESOLUTION OF THE LODI CITY COUNCILAMENDING TRAFFIC RESOLUTION NO. 97-148 BY REDUCING SPEED LIMIT ON TURNER ROAD BETWEEN WEST CITY LIMITS AND EVERGREEN DRIVE FROM 50 MILES PER HOUR TO 40 MILES PER HOUR WHEREAS, staff has recently updated Engineering and Traffic Surveys on Turner Road; and WHEREAS, staff recommendsthe speed limit be reduced from 50 miles per hour to 40 miles per hour between the west City limits and Evergreen Drive. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby approve the speed limit reduction from 50 miles per hour to 40 miles per hour on Turner Road between the west City limits and Evergreen Drive; and BE IT FURTHER RESOLVED that the City of Lodi Traffic Resolution No. 97-148, Section 7, "Speed Limits," is hereby amended by reducing the speed limit on Turner Road between the west City limits and Evergreen Drive from 50 miles per hour to 40 miles per hour. Dated: August 20, 2008 I hereby certify that Resolution No. 2008-171 was passed and adopted by the City Council of the City of Lodi in a regular meeting held August 20, 2008, by the following vote: AYES: COUNCIL MEMBERS— Hansen, Hitchcock, Johnson, Katzakian, and Mayor Mounce NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS— None ABSTAIN: COUNCIL MEMBERS—Non n�__ RAND[ JOHL City Clerk 2008-171