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Home My WebLink AboutAgenda Report - October 4, 2017 C-09CITY OF LODI COUNCIL COM MUNICATION AGENDA ITEM C•49 TM AGENDA TITLE: Adopt Resolution Amending Traffic Resolution No. 97-148, by Approving 35 Miles - Per -Hour Speed Limit on Beckman Road, from Lockeford Street to Turner Road MEETING DATE: October 4, 2017 PREPARED BY: Public Works Director RECOMMENDED ACTION: Adopt resolution amending Traffic Resolution No. 97-148, by approving 35 miles -per -hour speed limit on Beckman Road, from Lockeford Street to Turner Road. BACKGROUND INFORMATION: Staff recently updated the City's Engineering and Traffic Survey (ETS) on Beckman Road. Based on State -mandated requirements, staff recommends decreasing the existing speed limit from 40 miles - per -hour (mph) to 35 mph on Beckman Road, from Lockeford Street to Turner Road. The ETS includes three primary factors when establishing posted speed limits: prevailing speeds (85th percentile 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, accident rate, and specific characteristics of this road segment, as shown in the Beckman Road 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 35 mph speed limit on Beckman Road, from Lockeford Street to Turner Road. FISCAL IMPACT: FUNDING AVAILABLE: The fiscal impact associated with this action is negligible. Funding for the sign and legend installation is from the Street Maintenance Operating Account (30156002), at an approximate cost of $800. (3/v14764,T )6,1/?f Andrew Keys Deputy City Manager/Internal Services Director Prepared by Dorothy Kam, Associate Traffic Engineer CES/DK/tdb Attachment cc: City Attorney Police Chief Police Sgt. Freeman PW Management Analyst, Yadav Charles E. Swimley, Jr. Public Works Director Deputy Public Works Director/City Engineer Transportation Manager/Senior Traffic Engineer Utility Manager APPROVED: c wabaau rdCity Manager K:\WP\TRAFFIC\CspeedsurveyBeckman2017.doc 9/19/2017 September 2017 SPEED ZONE REPORT - Beckman Road o REFERENCE - Speed zone surveys are performed in the City of Lodi following the Federal Highway Administration MUTCD and MUTCD California Supplement in accordance with Section 40802 (b) of the California Vehicle Code. o 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 2.7 ACC/MVM. 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 & residential driveway characteristics, residential density, and pedestrian & bicycle safety. ° STUDY RESULTS Eight radar surveys were performed and the 85th percentile speeds ranged from 35 to 46 mph, as shown below: Street Segment Northbound Southbound Kettleman Lane to Lodi Avenue 46 mph 45 mph Lodi Avenue to Pine Street 38 mph 40 mph Pine Street to Victor Road 35 mph 35 mph Lockeford Street to Turner Road 42 mph 42 mph K:\TRAFFIC\SPEEDZN\2017\Beckman2017.doc Page 1 of 2 Kettleman Lane to Lodi Avenue 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 1.0 is lower than the Citywide average and is higher than the 0.4 rate from 2013 survey. Based on 85th percentile speeds, continuing low accident rate at the current speed limit, and bicycle safety, we recommend retaining the 45 mph speed limit in this segment. Lodi Avenue to Pine Street The 85th percentile speeds on this segment are 38 and 40 mph. The 50th percentile speed is 35 mph. The accident rate of 0.0 is lower than the Citywide average and lower than the 0.9 rate from 2013 survey. Based on 85th percentile speeds and continuing low accident rate at this current speed limit, we recommend retaining the 35 mph speed limit in this segment. Pine Street to Victor Road The 85th percentile speed on this segment is 35 mph. The 50th percentile speed is 31 mph. The accident rate of 0.0 is lower than the Citywide average and lower than the 2.5 rate from 2013 survey. Based on 85th percentile speeds and continuing low accident rate at this current speed limit, we recommend retaining the 35 mph speed limit in this segment. Lockeford Street to Turner Road The 85th percentile speed on this segment is 42 mph. The 50th percentile speeds are 36 and 37 mph. The accident rate 5.7 in this segment is higher than the Citywide average and higher than the 3.4 rate from 2013 survey. Based solely on 85t percentile speeds the speed limit could be set at 40 mph; however, due to the higher accident rate at the current limit and pedestrian safety at bus stop, we recommend reducing the speed limit to 35 mph speed limit in this segment. ° CONCLUSION The recommended speed limits are shown below: SEGMENT POSTED SPEED LIMIT Kettleman Lane to Lodi Avenue 45 mph (no change) Lodi Avenue to Victor Road 35 mph (no change) Lockeford Street to Turner Road 35 mph (from 40 mph) (Dorothy) Pui Man Kam Associate Traffic Engineer K:\TRAFFIC\SPEEDZN\2017\Beckman2017.doc Page 2 of 2 LivviivLLrAiivv .--- AND TRAFFIC SURVEY a' E 2 2,200' _/ j w 1,100' SEE NARRATIVE FOR BACKGROUND INFORMATION o 6,100' 1,350' ci M NCC v �d 3m l 1i O �, R1-1I l'IN R1-1 Ili\ Z F R1-1 \> 4, J)[1 Q /tT1 0 H %H ` IIr I1 1-1 1 11 iR1-1 r O IzR11II 1 o ', 0 Q 5 O Z (n (� w 0 o N .- M y 0 LU 13 Et W Z Q Q Q d 3 CC �� W H it Z > IY 2 J Q 0 p W W I- IY 1 Y 0 o i Q a Q z BECKMAN RD. CO 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE SPEED TABLE 55'-37' ROADWAY WIDTH 58' — — 1.--38' 40' 32' Ha 34' 40' 42' 34' H3T NO. OF LANES 2 Ins+ bike <X> 2 2 lanes + bike lanes - rt MEDIAN (TYPE) NONE TRAFFIC SIGNAL DATA 60ACT N/A AVERAGE DAILY TRAFFIC 7,330 (6,400) 5,460 1,280 OBS. SPEED-CRITICAL,85th% NB 46 38 35 42 SB 45 40 35 42 -PACE(%) NB 37-47 (66) 31-41 (89) 26-36 (82) 31-41 (62) SB 36-46 (68) 29-39 (77) 26-36 (78) 34-44 (69) -MEDIAN,50th% NB 41 35 31 36 SB 40 35 31 37 EXISTING SPEED ZONE 45 35 40 - mph mph mph PROPOSED SPEED ZONE — 45 mph h 35 mph 35 mph h 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) W1-4 -CURVE WARNING SIGN W13-1-CURVE ADVISORY SPEED () -TRAFFIC SIGNAL LIMIT - 50 NB NB /� 0 SB 0 �► NB !.. SSB •NB 30 —� • NB -CITY -CRITICAL SPEED -LOWER LIMIT OF PACE SD ACCIDENT PLOT YR: 2015 1 1 1 1 0 0 1 1 YR: 2016 1 1 0 0 1 X ACCIDENT RATE - ACC. / MILL. VEH. - MI. 1.0 0 0 5.7 DR: TP No. Date Revision Appr Approved By Traffic EngineerDate OF y<SPEED tioa CITY OF LODI°" A ,m9 �%��PUBLIC WORKS DEPARTMENT <, FOR BECKMAN RDDK/PJFa�; ZONE SURVEYonceTR SEPTEMBER 2017 2715e RESOLUTION NO. 2017-192 A RESOLUTION OF THE LODI CITY COUNCIL AMENDING TRAFFIC RESOLUTION NO. 97-148 BY APPROVING 35 MILES -PER -HOUR SPEED LIMIT ON BECKMAN ROAD, FROM LOCKEFORD STREET TO TURNER ROAD WHEREAS, staff recently updated the City's Engineering and Traffic Survey (ETS) on Beckman Road; and WHEREAS, the ETS includes three primary factors when establishing posted speed limits: prevailing speeds (85th percentile speeds), accident rates, and unexpected conditions. Other characteristics, such as residential density, pedestrian and bicycle safety, and roadway design speed, are also considered; and WHEREAS, the recommended posted speed limit is based on the prevailing speeds, accident rate, and specific characteristics of this road segment; and WHEREAS, based on the State -mandated requirements, staff is recommending decreasing the existing speed limit from 40 miles -per -hour (mph) to 35 mph on Beckman Road, from Lockeford Street to Turner Road; and WHEREAS, the Police Department has reviewed and concurs with staff's recommendations; and WHEREAS, staff recommends amending Traffic Resolution No. 97-148, Section 7 — Speed Limits, by approving 35 mph speed limit on Beckman Road, from Lockeford Street to Turner Road. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby amend Traffic Resolution No. 97-148, Section 7 — Speed Limits, by approving 35 miles -per -hour speed limit on Beckman Road, from Lockeford Street to Turner Road. Dated: October 4, 2017 I hereby certify that Resolution No. 2017-192 was passed and adopted by the City Council of the City of Lodi in a regular meeting held October 4, 2017, 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 r c NIFER City Clerk 2017-192 FERRAIOLO