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Home My WebLink AboutAgenda Report - December 21, 2016 C-12TM CITY OF LODI COUNCIL COMMUNICATION AGENDA ITEM C- 1 2 AGENDA TITLE: Adopt Resolution Amending Traffic Resolution No. 97-148 by Approving 30 Miles - Per -Hour Speed Limit on Crescent Avenue, from Lodi Avenue to Tokay Street MEETING DATE: December 21, 2016 PREPARED BY: Public Works Director RECOMMENDED ACTION: Adopt resolution amending Traffic Resolution No. 97-148 by approving 30 miles -per -hour speed limit on Crescent Avenue, from Lodi Avenue to Tokay Street. BACKGROUND INFORMATION: Staff recently updated the Engineering and Traffic Survey (ETS) on Crescent Avenue. Based on the State -mandated requirements, staff is recommending decreasing the existing speed limit from 35 miles per hour (mph) to 30 mph on Crescent Avenue, from Lodi Avenue to Tokay Street. 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 recommended, posted speed limit is based on the prevailing speeds (85th percentile speeds), accident rate, and specific characteristics of this road segment, as shown in the Crescent Avenue ETS (Exhibit A). The Police Department has reviewed and concurs with staff's recommendations. Staff recommends City Council adopt resolution amending Traffic Resolution No. 97-148 by approving a 30 mph speed limit on Crescent Avenue, from Lodi Avenue to Tokay Street. 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. . usan Bjork Supervising Budget Analyst Prepared by Dorothy Kam, Assistant Traffic Engineer CES/DK/tdb Attachment cc: City Attorney Police Chief Police Sgt. Freeman Charles E. Swimley, Jr. Public Works Director Deputy Public Works Director/City Engineer Transportation Manager/Senior Traffic Engineer Utility Manager APPROVED: 10- - chwaba er, • ity Manager K:\WP\TRAFFIC\Cspeedsurveycrescent2016.doc 12/12/16 November 2016 SPEED ZONE REPORT - Crescent Avenue, Kettleman Lane to Lodi Avenue ° 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 RESULT Six radar surveys were performed and the 85th percentile speeds ranged from 33 to 37 mph as shown below. Street Segment Kettleman Lane to Vine Street Vine Street to Tokay Street Tokay Street to Lodi Avenue Crescent2016.doc Northbound Southbound 36 mph 35 mph 37 mph 33 mph 35 mph 35 mph Kettleman Lane to Vine Street The 85th percentile speeds on this segment is 35 and 36 mph. The 50th percentile speeds are 30 and 32 mph. The accident rate of 0.9 is below the Citywide average and lower than the 2.0 rate from the 2010 survey. Based on prevailing speeds and continuing low accident rate, we recommend retaining the 35 mph speed limit on this segment. Vine Street to Tokay Street The 85th percentile speeds on this segment are 33 and 37 mph. The 50th percentile speeds are 30 and 31 mph. The accident rate of 0.0 is below the Citywide average and lower than the 2.2 rate from the 2010 survey. Based on prevailing speeds and continuing low accident rate, we recommend retaining the 35 mph speed limit on this segment. Tokay Street to Lodi Avenue The 85th percentile speed on this segment is 35 mph. The 50th percentile speed is 31 mph. The accident rate of 7.3 is above the Citywide average and higher than the 0.0 rate from the 2010 survey. Based on prevailing speeds, the speed limit on this segment could be posted at 35mph; however, due to the higher accident rate than average accident rate, we recommend reducing the speed limit to 30 mph in this segment. ° CONCLUSION The recommended speed limits are shown below: Crescent Avenue Segment Kettleman Lane to Vine Street Vine Street to Tokay Street Tokay Street to Lodi Avenue Paula J. Fernandez Transportation Manager/Senior Traffic Engineer Crescent2016.doc Posted Speed Limit 35 mph (no change) 35 mph (no change) 30 mph (from 35 mph) LINVIINLLRIINV AND TRAFFIC SURVEY .z_________-1,/,/!.,,____________ SEE NARRATIVE FOR BACKGROUND INFORMATION z LEROY NICHOLS SCHOOL R1-1 1,325' I C l R1-1 T 1 325' v N JI T 1 R1 1 RT1IIG _.,111i. �� R1 1 R1-1 T 0 ¢ W R1 1 1,300' li ¢ R1�1 R1 1 >- OI R1-1 1 ,300' 0 -113 - LU CC LU a_ CCY II 41 R1 1 0 2 Q �• ��. �� T R1 T T AM w •0 I- r C Q m 2 E R1-1 0 U Q Q Q 1 - R1-1 0 w i- Q U J Q R17111 ,n< �� j w Nm �� R1-1 uj Z o (1 < R1-1 Y Q a_ 1~ YL)• 0 >- R1-1 0 O� 0 zZ > CRESCENT R1-1 F c 1 U) w z > AVE. �l l 2 I C R1-111 r tO �_ I N C 1/2 MILE 1 /2 MILE SPEED TABLE ROADWAY WIDTH 49' NO. OF LANES 2 w/Bike Lane MEDIAN (TYPE) NONE TRAFFIC SIGNAL DATA 60 Act 2 0 Act AVERAGE DAILY TRAFFIC 3,020 2,410 2,275 OBS. SPEED—CRITICAL,85th% Ng 36 37 35 SB 35 33 35 —MEDIAN,50th% Ng 32 31 31 SB 30 29 31 —PACE(%) NB 26-36(79) 26-36(65) 27-37(82) S3 24-34(71) 24-34(77) 26-36(74) EXISTING SPEED ZONE — 35 mph PROPOSED SPEED ZONE — 35 mph —}— 30 mph LEGEND: MPH SPEED GRAPH T —SIGN LOCATION R1-1 —STOP SIGN R2-1( ) —SPEED LIMIT SIGN (MPH) R1-2 —YIELD SIGN C —ASSEMBLY C (SCHOOL 25 MPH SIGN) W1—X —CURVE WARNING SIGN W13-1( ) —CURVE ADVISORY SPEED QII —TRAFFIC SIGNAL LIMIT 40 NB SSB O 1 1 5H NB 20 —CITY — —CRITICAL SPEED LOWER LIMIT OF PACE ACCIDENT PLOT YR:2014 0 0 1 YR: 2 01 5 1 0 1 1 ACCIDENT RATE—ACC./MILL. VEH.—MI. 0.9 0.0 7.3 DR: D.KAM No. Date Revision APPr Approved By Transportation Mgr/Sr Traffic Engineer Dote TR 1625 9 O'F _ _ y, ` CRESCE\T AV- Lodi Ave. to Kett e m a n Ln . SPEED SURVEY...) J ---�H:PAF°7'ZONE • CITY ()F LORI _��' •Q -9- •• PUBLIC WORKS DEPARTMENT - .- - FOR= DATE: November 2016 RESOLUTION NO. 2016-220 A RESOLUTION OF THE LODI CITY COUNCIL AMENDING TRAFFIC RESOLUTION NO. 97-148 BY APPROVING 30 MILES -PER -HOUR SPEED LIMIT ON CRESCENT AVENUE, FROM LODI AVENUE TO TOKAY STREET WHEREAS, staff recently updated the Engineering and Traffic Survey (ETS) on Crescent Avenue; and WHEREAS, based on the State -mandated requirements, staff recommends decreasing the existing speed limit from 35 miles per hour (mph) to 30 mph on Crescent Avenue, from Lodi Avenue to Tokay Street; and WHEREAS, 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 a consideration; and WHEREAS, staff recommends that the City Council authorize amending Traffic Resolution No. 97-148 by approving a 30 miles -per -hour speed limit on Crescent Avenue, from Lodi Avenue to Tokay Street. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby amend Traffic Resolution No. 97-148, Section 7, "Speed Limits," by approving a 30 miles -per -hour speed limit on Crescent Avenue, from Lodi Avenue to Tokay Street. Dated: December 21, 2016 I hereby certify that Resolution No. 2016-220 was passed and adopted by the City Council of the City of Lodi in a regular meeting held December 21, 2016, by the following vote: AYES: COUNCIL MEMBERS — Chandler, Johnson, Mounce, Nakanishi, and Mayor Kuehne NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS — None ABSTAIN: COUNCIL MEMBERS — None 2016-220 NIFEFERRAIOLO ity Clerk