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Home My WebLink AboutAgenda Report - July 15, 2015 C-23AGENDA ITEM Co"bZt3 CITY OF LODI COUNCIL COMMUNICATION TM AGENDA TITLE: Adopt Resolution Amending Traffic Resolution No. 97-148 by Approving a 50 Miles -Per -Hour Speed Limit on Lodi Ave from West City Limits to Rose Gate Drive MEETING DATE: July 15, 2015 PREPARED BY: Public Works Director RECOMMENDED ACTION: Adopt a resolution amending Traffic Resolution No. 97-148 by approving a 50 miles -per -hour speed limit on Lodi Avenue from west city limit to Rose Gate Drive. BACKGROUND INFORMATION: Staff recently updated the Engineering and Traffic Survey (ETS) on Lodi Avenue due to the recent roadway improvement on Lodi Avenue. Based on the State -mandated requirements, staff is recommending decreasing the existing speed limit from 55 to 50 mph on Lodi Avenue from west city limit to Rose Gate Drive. The 55 mph speed limit was previously under the county jurisdiction. The ETS includes three primary factors when establishing posted speed limits: prevailing speeds, accident rates, and unexpected conditions. Other characteristics, such as residential density, pedestrian and bicycle safety, and roadway design speed, are also considered. The Police Department has reviewed and concurs with staff's recommendations. As shown in the attached Lodi Avenue ETS, the recommended posted speed limit is based on the prevailing speeds (85th percentile speeds), accident rate and specific characteristics of this road segment. FISCAL IMPACT: Normal maintenance only. FUNDING AVAILABLE: Funding for the sign and legend installation is from the Street Maintenance Operating Account (30156002), at an approximate cost of $800. Jordan Ayers Deputy City Manager/Internal Services Director Prepared by Dorothy Kam, Assistant Engineer FWS/DK/eb cc: City Engineer/Deputy Public Works Director Transportation Manager/Senior Traffic Engineer APPROVED: Ctr_2_� gw F. Wally Sandelin Public Works Director City Manager K:\WP\TRAFFIC\Cspeedsurveylodi2015 doc 6/30/2015 June 2015 SPEED ZONE REPORT - Lodi Avenue, West City Limits to Lower Sacramento Road ° 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: 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 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 2.6 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 & 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 RESULTS Four radar surveys were performed and the 85th percentile speeds ranged from 41 to 50 mph as shown below. Radar surveys were not performed between intersections that were too close together to record free flowing traffic conditions. Street Segment Eastbound Westbound West City Limits to Rose Gate Drive 50 mph 48 mph Rose Gate Drive to Lower Sacramento Rd 43 mph 41 mph K:\TRAFFIC\SPEEDZN\2015\Lodi2015.doc SPEED ZONE REPORT - Lodi Avenue, West City Limits to Lower Sacramento Road Page 2 West City Limits to Rose Gate Drive The 85th percentile speeds on this segment are 48 and 50 mph. The 50th percentile speeds are 43 and 45 mph. There have been no accidents on this recently widened street segment. Based solely on the 85th percentile speeds, we recommend changing the speed limit to 50 mph along this segment. Rose Gate Drive to Lower Sacramento Road The 85th percentile speeds on this segment are 41 and 43 mph. The 50th percentile speed ranged from 37 to 38 mph. The accident rate of 0.9 on this segment is below the Citywide average and lower than the 2.2 rate from the 2007 survey. Based solely on the 85th percentile speeds and the continuing low accident rate at the current speed limit, we recommend retaining the 40 mph speed limit along this segment. ° CONCLUSION The recommended speed limits are shown below: STREET SEGMENT West City Limits to Rose Gate Drive Rose Gate Drive to Lower Sacramento Road *County road annexed into City's jurisdiction. Paula Fernandez Transportation Manager/ Senior Traffic Engineer K:\TRAFFIC\SPEEDZN\2015\Lodi2Ol5.doc EXISTING SPEED LIMIT 55 mph* 40 mph POSTED SPEED LIMIT 50 mph no change 1777KIf"NIn117771777nIKI/1% I W LIVVIIVLLINil VV U O AND TRAFFIC SURVEY o o Q J I— d Z LUQ SEE NARRATIVE FOR O O O IY BACKGROUND INFORMATION � < w m LU O O 5 Q 2 w Q o J 1-- iY 0� J i) 0� >_ 1,100' 1,520' N � U F Z7 N IJ LODI AVE. J U 1/2 MILE J SPEED TABLE ROADWAY WIDTH 23 40' 0. 72' Varies 48'-64' NO. OF LANES 2 3 4 MEDIAN (TYPE) None Raised Concrete None TRAFFIC SIGNAL DATA 80ACT AVERAGE DAILY TRAFFIC 3,763 5,488 9,000 OBS. SPEED-CRITICAL,85th% EB 50 43 WB 48 41 -PACE(%) EB 43-53(72) 34-44(72) WB 39-49(71) 32-42(76) -MEDIAN,50th% EB 45 38 WB 43 37 EXISTING SPEED ZONE 55 mph Count 55 mph 1 40 mph PROPOSED SPEED ZONE 55 mph (County) 50 mph 40 mph LEGEND: MPH SPEED GRAPH T -SIGN LOCATION R1-1 -STOP SIGN R2-1() -SPEED LIMIT SIGN (MPH) 50 R1-2 -YIELD SIGN C -ASSEMBLY C (SCHOOL 25 MPH SIGN) W1 _x -CURVE WARNING SIGN 40--- W1 3-1 -CURVE ADVISORY SPEED O-ROUNDABOUT TRAFFIC SIGNAL 30 -CITY LIMIT SPEED - -CRITICAL -LOWER LIMIT OF PACE ACCIDENT PLOT YR: 2013 N/A 0 YR: 2014 N/A 1 ACCIDENT RATE - ACC. / MILL. VEH. - MI. N/A 0.9 DR: DK No. Date Revision Appr Approved By TransportationManager/SrTrafficEngineer TR 1625 Date • 10 CITY OF LO D I PUBLIC WORKS DEPARTMENT LODI AVE West City Limits to Lower Sacramento SPEED ZONE SURVEY DH: PJF DATE: JUNE 2015 RESOLUTION NO. 2015-114 A RESOLUTION OF THE LODI CITY COUNCIL AMENDING TRAFFIC RESOLUTION NO. 97-148 BY APPROVING A 50 MILES -PER -HOUR SPEED LIMIT ON LODI AVENUE FROM THE WEST CITY LIMITS TO ROSE GATE DRIVE WHEREAS, staff has recently updated Engineering and Traffic Surveys on Lodi Avenue; and WHEREAS, based on the State -mandated requirements, staff recommends decreasing the existing speed limit from 55 to 50 miles per hour on Lodi Avenue from the west City limits to Rose Gate Drive. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby approve the speed limit reduction from 55 miles per hour to 50 miles per hour on Lodi Avenue from the west City limits to Rose Gate 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 from 55 miles per hour to 50 miles per hour on Lodi Avenue from the west City limits to Rose Gate Drive. Dated: July 15, 2015 ---------------------------------- I hereby certify that Resolution No. 2015-114 was passed and adopted by the City Council of the City of Lodi in a regular meeting held July 15, 2015, by the following vote: AYES: COUNCIL MEMBERS — Chandler, Kuehne, Mounce, Nakanishi, and Mayor Johnson NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS — None ABSTAIN: COUNCIL MEMBERS — None NNIFER FERRAIOLO City Clerk 2015-114