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Home My WebLink AboutAgenda Report - January 2, 2003 I-03, Dk_11TY OF LODI r"Orv, COUNCIL COMMUNICATION AGENDA TITLE: Adopt Resolution Amending Traffic Resolution 97-148 Approving Speed Limit Reduction on Lodi Avenue between Cherokee Lane and Guild Avenue from 40 to 35 Miles per Hour MEETING DATE: January 2, 2003 PREPARED BY; Public Works Director RECOMMENDED ACTION: That the City Council adopt a resolution amending Traffic Resolution 97-148 by approving the speed limit reduction on Lodi Avenue between Cherokee Lane and Guild Avenue from 40 to 35 miles per hour, as shown on the attached Engineering and Traffic Survey (Exhibit A). BACKGROUND INFORMATION: Per Section 40802(b) of the California Vehicle Code, in order for speed limits to be enforceable using radar, Engineering and Traffic Surveys must be updated a minimum of every five years on all "non -local" streets. "Non -local" streets are collector and arterial streets included in the Federal Aid System. In compliance with this code section, the Public Works Department has reviewed speed limits on the following six streets. The existing speed limits on these streets are shown on Exhibit B, • Century Boulevard • Evergreen Drive, Elm Street to Turner Road • Lodi Avenue • Lower Sacramento Road • Victor Road, Cherokee Lane to Highway 99 • Vine Street, Lower Sacramento Road to Hutchins Street Engineering and Traffic Surveys are performed using State of California Department of Transportation (Caltrans) guidelines. The surveys include a map showing the physical characteristics of the roadway, such as roadway width, number of through lanes, and traffic controls. Traffic volumes, prevailing speeds, and accidents are analyzed and the results are provided in a written narrative for each street. The following three factors are considered when determining speed limits. Prevqii�g,eq§ eeds - 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 5 miles per hour (rnph). 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 APPRGw_rX Dix& Flynn Citi Man CA M.NS peedReoucuun 1211 q/02 Adopt Resolution Arrending Traffic Resolution 97-148 Approving Speed Limit Reduction on Lodi Avenue between Cherokee Lane and Guild Avenue from 40 to 35 Miles per Hour January 2, 2003 Page 2 following factors were considered: roadway design speed, safe stopping sight distance, superelevation, shouider conditions, profile condition, intersection spacing and offsets, commercial and residential driveway characteristics, residential density, and pedestrian and bicycle safety. .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 average Citywide accident rate is 4.1 ACC/MVM. STUDY RESULTS, Of the seven streets surveyed, staff is recommending changing the speed limit on the portion of Lodi Avenue from Cherokee Lane to Guild Avenue. Since the 1997 survey, there has been increasing, development in this area including the extension of Guild Avenue south of Lodi Avenue. These changes are reflected in the substantial increase in traffic volumes. "The range of 85t' percentile speeds has also reduced from 45 to 40 mph to 40 to 34 mph. used on the reduction in speeds and commercial driveway characteristics, we support reducing the speed limit from 40 to 35 mph on this segment_ Staffrecommends that City Coundl approve reducing the speed limit on the portion of Lodi Avenue described below: Street ,aggn: jMt ExiA stin Pro osed Cherokee Lane to Guild Avenue 40 mph 35 mph FUNDING: Funding for the modifications to speed limit signs and pavement legends from the Street Maintenance Account at an approximate cost of $600. Funding Available: _.- -')-" Finance �Directr Richard C. Prim Jr. Public Works Director Prepared by Rick S. Kiriu, Senior Engineering Technician RCPIRSK!pmf Attachiments cc: City Attorney poke cheF City Engineer Street SLIperintendent. Senior Traffic, Engineer Police Lieutenant Grenko (,Lodi S p(_,�-! R FA w,"Lior i 12/19102 ENGINEERING AND TRAFFIC SURVE", SEE NARRAr IVF Fop BACKGROUND 114FORM110N 2 �6' Q' 2 X A JLJL �®r- JL 4JtJUJ 7, t AVE M, /2 m,,i-E ml --- 2 ----------- SPEED TABLE - ----- - - -------- — -------------------------- ------------------- ----------------- ---- ---------- 4� R 0� - --------------- --------- � 6f-" Vur;ts '56' U, RR 'DwA.-r - ---------- - ----------- NO. OF LANE� 2 - ------ ------------ ------ 2 MEDIAN (TYPE) 'LRA F€C SINAL DAT,% ?,qACT '��ACT 30ACT 2 0 A T, <3>20AC� A(, 1. 24PC� �,IoAC5 - -- -------------------- ---------- — -------- 7, 10 9. 40 5 5 0)1 4701 �.-,20 5. 7 6 C� -- — ---------------- ----- CBS, 36 kq - - ------------------------ W Ei 44 43 -sz 40 -PAC` 4 - 4 4 7 c5' 3 3 24 25, 26-W75) 4'l17) ) --- - . . I -------------------- --- 'W FA 34 - 4 4 7 19) 24 -34(86) 3i(72 26-316(54' 2 3 8 N� T�P�i —50 � _h%F -Z3 39 M 28 3C3J 34 — — ------------ 40 39 9 30 30 35 LXISTAE ED ZONE - - -- -- --- -- ----- mph 0- rr,,)h 40) r1 - -------- ... .. ROPO��EO SPHO ZONE (i mThi . ...... 0 rr ------ 3L� rlP�- ----- --- ---------- - - - - -- - - - - - - - - - - -7 LEGEND D L 1. 1 '1 - - - - - - j T - - - - - - - - -7- C -4. - - - - - - 4 j--- 1 -------- ACC€CENT PLI-11 T 1 4 --o-7- --------- -- YR: 2 1 ---------- A- -NT --ACC,. -,i M: D R TE -AC 2 2.1 2,6 I SPEED LODI y 0� ZONE "ARTMEN'T ....... .. . . PUOUC WO�3KS DEF SURVE December 2002 SPEED ZONE REPORT .- Lodi Avenue, West City Limits to Guild Avenue REFERENCE - Speed zone surveys are performed in the City of Lodi following State of CaVomia 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 Mani_4. STUDY CRITERIA - limportant factors to consider in determining the speed lirnit which is most appropriate to facilitate the orderly movement of traffic and that is masonably safe are; Prevailing Speeds f85th-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 'he 85th percentile speed. However, in rnatching 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. Q'_n�exp ��hd - Condifions - When roadside development results in traffic conflicts and unuslual conditions which are not readily apparent to drivers, speed lirnits 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, Accidents - Accident records of the two most recent years were considered in deterrnsning the speed zones. Accidents an 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 6.3 ACC/MVM, The average Citywide accident rate 41 ACC(MVM. STUDY RESUI - TS Six radar surveys were performed and the 85th percentile speeds ranged from 34 to 44 mph as shown beiow. Radar sul-veys were not performed between signalized intersection that were too close together to record free flowing traffic conditions. Street Seqment West City limits to Mills Avenue Mills Avenue to Harr) Lane Ham Lane. to Church Street Church Street to, Beckman Road Beckman Road to Guild Avenue EastbOLAnd 43 mph 43 mph 33 mph 34 mph 36 & 39 mph Westbound 44 mph 43 mph 32 mph 35 mph 34 & 40 mph West Cid Limits to Mills Avenue The 85th percentile speeds on this segment are 43 and 44 mph. The 50th percentile speeds are 39 and 40 rT)ph, The highest accident rate of 4.5 on this segment is slightly above the Citywide average and slightly lower than the 4.7 rate from the 1997 survey. Based on 851h percentile speeds, reasonable accident rate, t 0!"� SPEED ZONE REPORT - Lodi Avenue, West City Limits to Guild Avenue 'I _age 2 intersection spacing and offsets, residential driveway characteristics, and residential density, we recommend retaining the 40 mph speed limit along this segment, Mills Avenue to Ham Lane The 85th percentile s ' peed an this segment is 43 mph. The, 50th percentile speeds ,9 c -e 38 and 39 mph, The accident rate of 2.1 on this segment is below to the Citywide average and slightty higher than the 1,4 rate from the 1997 survey. used on 855`' percentile speeds, continuing low accident rate, residential driveway characteristics, and residential density, we recommend retaining the 40 mph speed Hmit aiong this segment. Hare Lane to Church Street The 85th percentile speeds on this segments are 32 and 33 mph. The 50th percentile speeds are 28 and 29 mph. The highest accident rate of 6,3 on this segment is above, the Citywide, average and slightly higher than the 5.1 rate from the 1997 suvey. Based on 85'r percentile speeds, reasonable accident rate, mtersection offset and spa6ng, vve recommend retaining the 30 mph speed limit along this segment, Church Street to Cherokee Lane hey 85th percentile speeds on this segment are 34 and 35 mph. The 50th perCenUle speed is 30 mph, The highest accident rate of 5.8 on this segment is above -the Citywide average but lower than the 7.6 rate from the 1997 survey. Based on 85f' percentile, speeds, reasonable accident rate, commercial and resiedential driveway characteristics, we recommend retaining Vie 30 mph speed limit along this segment, Qherqlk_e�e LQ_aej_to Guiid Avenue The 85th percentile speeds on this segment range from 34 to 40 mph. The 50th percentile speeds range from 30 to 35 mph. The accident rate of 2.6 in this segm.-nt is below the Citywide average and lower than the 5.5 rate from the 1997 survey, used on 85�" percentile speeds and commercial driveway characteristics we recornmend reducing the speed limit from 40 mph to 35 mph along this segment. DONCLUSION I- - The recommended speed limits are shown below. - STREET SEGMENT ''Vest City Limits to Mills Avenue Mills Avenue to Ham Lane Ham Lane to Church Street C"hUrch Street to Cherokee Lane Cherokee Lane to Guild Avenue F. �Alaiiy 'Sandellin City Engineer POSTED SPEED LIMIT 40 mph (no change} 40 mph (no change) 30 mph (no change) 30 mph (no change) 40 to 35 mph CITY OF LJI PUBLIC WORKS DEPARTMENT .; XHIBs B L I 3 ul 61 i m_L,30 / 41 �t(40) Ge3- ;OKAY V!; "'OR {t-1Y1Y 12J 40 4i) s VINE � tiff v 4C x ;l: c� o w i'OF�R w Y 35 35 35 U :35 40 4S 4C� ALMON[) REVISED: NoVembei2002 �4:\7RAF'F'EC\BRAC€�12Ai72.D S 9 I 40 .00 �_ .�i 30 U af —34 3 3c 30 c ! o €303 `., j 'T`LOCKEFO„'u "e 35 g 35 i ct. a 35 EY 3 .; XHIBs B L I 3 ul 61 i m_L,30 / 41 �t(40) Ge3- ;OKAY V!; "'OR {t-1Y1Y 12J 40 4i) s VINE � tiff v 4C x ;l: c� o w i'OF�R w Y 35 35 35 U :35 40 4S 4C� ALMON[) REVISED: NoVembei2002 �4:\7RAF'F'EC\BRAC€�12Ai72.D I 40 .00 �_ .�i 30 v N,E 3 35 3Q z j w EY B, .ttiJY.S'�NE y< 30 CENTURY 1 E 45 s5 G �i 4a 35 r3.ARNEYY 1, E i .; XHIBs B L I 3 ul 61 i m_L,30 / 41 �t(40) Ge3- ;OKAY V!; "'OR {t-1Y1Y 12J 40 4i) s VINE � tiff v 4C x ;l: c� o w i'OF�R w Y 35 35 35 U :35 40 4S 4C� ALMON[) REVISED: NoVembei2002 �4:\7RAF'F'EC\BRAC€�12Ai72.D 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; and WHEREAS, per §40802(b) of the California Vehicle Code, Engineering and Traffic Surveys, must be updated a minimum of every five years on "non -local" streets, "Non -local" streets are collector and arterial streets included in the Federal Aid System, and speed limits on streets where surveys are older than five years cannot be enforced using radar; and WHEREAS, the Public Works Department recently performed Engineering and Traffic Surveys on Century Boulevard.- Evergreen Drive, Elm Street to Turner Road; Lodi Avenue, Lower Sacramento Road; Victor Road, Cherokee Lane to Highway 99; Vine Street, Lower Sacramento Road to Hutchins Street; and WHEREAS, staff recommends modifying the speed limit on Lodi Avenue between, Cherokee Lane and Guild Avenue from 40 to 35 miles per hour. NOW, THEREFORE, BE IT RESOLVED, that the City Council of the City of Lodi does Hereby approve the speed limit reduction on Lodi Avenue between Cherokee Lane and Guild Avenue from 40 to 35 miles per hour; 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 Lodi Avenue between Cherokee Lane and Guild Avenue from 40 to 35 miles per hour. Dated: January 2, 2003 I hereby certify that Resolution No. 2003-06 was passed and adopted by the City Council_ of the City of Lodi in a regular meeting held January 2, 2003, by the following vote: AYES: COUNCIL MEMBERS — Beckman, Hansen, Howard, Land, and Mayor Hitchcock NOES; COUNCIL MEMBERS — None gmim