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Home My WebLink AboutAgenda Report - August 1, 2001 E-16CITY OF LODI COUNCIL COMMUNICATION J �.__ I AGENDA TITLE: Adopt Resolution Amending Traffic Resolution Approving Speed Limit Modifications on Kettleman Lane, Stockton Street, and Turner Road MEETING DATE: August 1, 2001 PREPARED BY: Public Works Director RECOMMENDED ACTION: That the City Council adopt a resolution amending Traffic Resolution No. 97-148 by approving the speed limit modifications on portions of Kettleman Lane, Stockton Street, and Turner Road as shown on Exhibits A through C. The Public Works Department recently performed Engineering and Traffic Surveys on the following fourteen streets: • Beckman Road • Brandywine Drive • California Street, Lockeford Street to Turner Road • Cluff Avenue, Lodi Avenue to Turner Road • Eilers Lane • Ham Lane • Holly Drive • Kettleman Lane • Lockeford Street • Loma Drive • Rutledge Drive • Sacramento Street, Lodi Avenue to Turner Road • Stockton Street • Turner Road, West City Limits to Lower Sacramento Road Per Section 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. Speed limits on streets where surveys are older than five years cannot be enforced using radar. Engineering and Traffic Surveys are performed using State of California Department of Transportation (Caltrans) guidelines. The surveys include a map showing the street and 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. Accident rates, determined by the number of accidents occurring within a segment of roadway along with the traffic volume, are shown in accidents -per -million -vehicle -miles (ACC/MVM). The citywide accident rate is 4.2 ACC/MVM. Three factors should be considered when determining the speed limit most appropriate to facilitate the orderly and reasonably safe movement of traffic: prevailing speeds, unexpected conditions to drivers, and accident records. Reasonable speeds conform to the actual behavior of the majority of motorists and, by measuring motorists' speeds, one can select a speed limit that is both reasonable and effective. Speed limits should normally be established at the first five - mile -per -hour (mph) increment below the 851" percentile speed. However, engineering judgement may indicate the need to reduce the speed limit by 5 mph. STUDY RESULTS: Of the fourteen streets surveyed, staff is recommending modifying the speed limit on the following street segments: APPROVED: Dix n Flynn - City Manager CSPDKTLMNSTKNTRNR 07!24/01 E-) G Adopt Resolution Amending Traffic Resolution Approving Speed Limit Modifications on Kettleman Lane, Stockton Street, and Turner Road August 1, 2001 Page 2 KETTLEMAN LANE Highway 99 to Beckman Road (North) — Since the previous survey, there have been several improvements made on this portion of Kettleman Lane, including the addition of traffic signals at the Highway 99 on- and off -ramps and the realigned intersection of north Beckman Road. A raised median and an additional travel lane were also installed in each direction making it a four -lane roadway. The 85t' percentile speeds on this segment are 33 and 38 mph. The 50'" percentile speeds are 27 and 33 mph. The accident rate of 5.5 in this segment is higher than the citywide average, and significantly lower than the 31.7 rate from the 1996 survey. Based on prevailing speeds, this segment could be set at either 30 or 35 mph; however, in coordinating with adjacent jurisdictions, we recommend reducing the speed limit from 40 mph to 35 mph in this segment. Beckman Road (North) to East City Limits — Since the previous survey, the City limits have been extended east, incorporating approximately 900 additional feet of roadway. The 851" percentile speed on this segment is 49 mph. The 501" percentile speeds are 43 and 45 mph. The accident rate of 0.6 is lower than the citywide average and similar to the 0.9 rate from the 1996 survey. Based solely on the 85'" percentile speeds, the speed limit on this segment could be set at 45 mph; however, since the accident rate appears to have stabilized at the existing speed limit, we recommend reducing the speed limit from 45 to 40 mph in this segment. This area is also a transition area between the 35 mph limit west of Beckman Road and the 45 mph limit east of the City limits, in the area under county jurisdiction. STOCKTON STREET Harney Lane to Kettleman Lane — The 85'" percentile speeds in this segment are 43 and 44 mph. The 50'" percentile speed is 39 mph. The accident rate of 4.0 on this segment is lower than the citywide average and slightly below the 4.4 rate from the 1996 survey. Since the 1996 survey, much development has occurred in this segment and the daily traffic volumes have increased. Based on the reduction in 85'" percentile speeds and recent development, we recommend reducing the speed limit from 45 to 40 mph in this segment. TURNER ROAD I West City Limits to Evergreen Drive — The 85"percentile speeds on this segment are 50 and 52 mph. The 50`" percentile speeds are 44 and 46 mph. There have been no accidents occurring in this segment during this or the previous study. The remaining portion will be surveyed in 2003. Based on the 85" percentile speeds and lack of accidents, we recommend reducing the speed limit from 55 to 50 mph in this segment. RECOMMENDED ACTION: Speed limit changes are recommended on the following: Street Segment Existing Proposed Kettleman Lane, from Highway 99 to Beckman Road (north) 40 mph 35 mph Stockton Street, from Harney Lane to Kettleman Lane 45 mph 40 mph Turner Road, from the West City limits 55 mph 50 mph Evtry+ttn U0140 - FUNDING: Funding for the modifications to speed limit signs and pavement legends from the Street Maintenance Account at an approximate cost of $2,000. Vicky McAthie Prepared by F c!F§'K%,D,4JUtR5ineering Technician RCP/RSK/Im Attachments cc: City Attorney Police Chief City Engineer Street Superintendent Associate Traffic Engineer Police Officer - Rafiq Police Sergeant Grenko CSPDKTLMNSTKNTRNR JaL Richard C. 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These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. 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 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 five miles per hour. 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 driveway characteristics, and pedestrian traffic in the roadway without sidewalks. 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 accident rate ranged from 0.6 to 5.5 ACC/MVM. The average Citywide accident rate is 4.2 ACC/MVM. ° STUDY RESULTS Two radar surveys were performed and the 85th percentile speeds ranged from 33 to 49 mph as shown below: Street Segment Eastbound Westbound Highway 99 to Beckman Road (north) 38 mph 33 mph Beckman Road (north) to East City Limits 49 mph 49 mph Kettleman SPEED ZONE REPORT - Kettleman Lane Page 2 Highway 99 to Beckman Road (north) The 85th percentile speeds on this segment are 33 and 38 mph and the 50th percentile speeds are 27 and 33 mph. The accident rate of 5.5 in this segment is higher than the Citywide average, and significantly lower than the 31.7 rate from the 1996 survey. The reason for the reduction of accidents in this area is likely due to the median and traffic signal installed since the 1996 survey. Based on prevailing speeds this segment could be set at either 30 or 35 mph; however, in coordinating with adjacent jurisdictions (Caltrans jurisdiction west of Highway 99), we recommend reducing the speed limit from 40 mph to 35 mph in this segment. Beckman Road (north) to East City Limits The 85th percentile speed on this segment is 49 mph. The 501h percentile speeds are 43 and 45 mph. The accident rate of 0.6 is lower than the Citywide average and basically unchanged from the 0.9 rate from the 1996 survey. Based solely on the 85th percentile speeds, the speed limit on this segment could be set at 45 mph; however, since the accident rate appears to have stabilized at the existing speed limit, we recommend retaining the 40 mph speed limit in this segment and extending this speed limit to the new east city limits. This area is also a transition area between the 35 mph limit west of Beckman Road and the 45 mph limit east of the city limits, which is under the county's jurisdiction. CONCLUSION The recommended speed limits are shown below: STREET SEGMENT Highway 99 to Beckman Road Beckman Road to New East City Limits F. 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RID S .LISIHX.7 August 2001 SPEED ZONE REPORT - Stockton Street REFERENCE - 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. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. 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 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 five miles per hour. 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 driveway characteristics, and pedestrian traffic in the roadway without sidewalks. 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 accident rate ranged from 0.0 to 8.7 ACClMVM. The average Citywide accident rate is 4.2 ACC/MVM. STUDY RESULTS Fourteen radar surveys were performed and the 85th percentile speeds ranged from 30 to 44 mph as shown below: Street Segment Northbound Southbound Harney Lane to Kettleman Lane 44 mph 43 mph Kettleman Lane to Tokay Street 38-41 mph 39-39 mph Tokay Street to Lodi Avenue 35 mph 32 mph Lodi Avenue to Pine Street 33 mph 32 mph Pine Street to Lockeford Street 30 mph 31 mph Lockeford Street to Turner Road 42 mph 40 mph Stockton SPEED ZONE REPORT - Stockton Street Page 2 Harney Lane to Kettleman Lane The 85th percentile speeds in this segment are 43 and 44 mph. The 50th percentile speed is 39 mph. The accident rate of 4.0 on this segment is lower than the Citywide average and slightly below the 4.4 rate from the 1996 survey. Since the 1996 survey, much development has occurred in this segment and the daily traffic volumes have increased. Based on the reduction in 85th percentile speeds, we recommend reducing the speed limit in this segment to 40 mph. Kettleman Lane to Tokav Street The 85th percentile speeds in this segment range from 39 to 41 mph. The 50th percentile speeds range from 34 to 36 mph. The accident rate of 3.4 on this segment is lower than the Citywide average and below the 5.4 rate from the 1996 survey. Based on the 85h percentile speeds and continuing low accident rate, we recommend retaining the 35 mph speed limit in this segment. Tokav Street to Lodi Avenue The 85th percentile speeds on this segment are 32 and 35 mph. The 50th percentile speed is 30 mph. The accident rate of 1.4 on this segment is lower than the Citywide average and above 0.5 rate from the 1996 survey. Based on 851h percentile speeds and continuing low accident rate, we recommend retaining the 30 mph speed limit in this segment. Lodi Avenue to Pine Street The 85th percentile speeds on this segment are 32 and 33 mph. The 50th percentile speed is 27 mph. The accident rate of 2.1 on this segment is lower than the Citywide average and below the 4.0 rate from the 1996 survey. Based on the 850, percentile speeds and continuing low accident rate, we recommend retaining the 30 mph speed limit in this segment. Pine Street to Lockeford Street The 85th percentile speeds on this segment are 30 and 31 mph. The 50th percentile speeds are 28 and 29 mph. The accident rate of 8.7 on this segment is higher than the Citywide average and below the 9.5 rate from the 1996 survey. Based on the 85th percentile speeds and reduced accident rate, we recommend retaining the 30 mph speed limit in this segment. Lockeford Street to Turner Road The 85th percentile speeds on this segment are 40 and 42 mph. The 50th percentile speeds are 36 and 37 mph. The accident rate of 4.7 in this segment is higher than the Citywide average and above the 3.6 rate from the 1996 survey. Based solely on the 85th percentile speeds, the speed limit could be set at 40 mph; however, due to the increased accident rate, we recommend retaining the 35 mph speed limit in this segment. Stockton SPEED ZONE REPORT - Stockton Street Page 3 CONCLUSION The recommended speed limits are shown below: STREET SEGMENT Harney Lane to Kettleman Lane Kettleman Lane to Tokay Street Tokay Street to Lodi Avenue Lodi Avenue to Pine Street Pine Street to Lockeford Street Lockeford Street to Turner Road F. Wally Sandelin City Engineer Stockton POSTED SPEED LIMIT 45 mph to 40 mph 35 mph (no change) 30 mph (no change) 30 mph (no change) 30 mph (no change) 35 mph (no change) August 2001 SPEED ZONE REPORT - Turner Road, West City Limits to Lower Sacramento Road REFERENCE - 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. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. 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 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 five miles per hour. 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 driveway characteristics, and pedestrian traffic in the roadway without sidewalks. 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 accident rates on this segment are 0.0 and 0.7 ACC/MVM. The average citywide accident rate is 4.2 ACC/MVM. STUDY RESULTS Two radar surveys were performed and the 85th percentile speeds ranged from 42 to 52 mph as shown below: Street Segment Westbound Eastbound West City limits to Evergreen Drive 50 mph 52 mph Evergreen Drive to Lower Sacramento Road 42 mph 44 mph West City Limits to Evergreen Drive The 85" percentile speeds on this segment are 50 and 52 mph. The 50" percentile speeds are 44 and 46 mph. There have been no accidents within this segment during the two-year survey period. Based on recent prevailing speeds and low accident rate, we recommend reducing the speed limit from 55 to 50 in this segment. Turner SPEED ZONE REPORT - Turner Road Page 2 Evergreen Drive to Lower Sacramento Road The 85`h percentile speeds on this segment are 42 and 44 mph. The 501h percentile speed is 37 mph. The accident rate of 0.7 on this segment is lower than the Citywide average and slightly above the 0.0 rate from the 1998 survey. Based on 851h percentile speeds and continuing low accident rate, we recommend retaining the 40 mph speed limit in this segment. CONCLUSION The recommended speed limits are shown below: STREET SEGMENT West City limits to Evergreen Drive Evergreen Drive to Lower Sacramento Road F. Wally Sandelin City Engineer Turner POSTED SPEED LIMIT 55 to 50 mph 40 mph (no change) RESOLUTION NO. 2001-191 A RESOLUTION OF THE LODI CITY COUNCIL APPROVING SPEED LIMIT MODIFICATIONS ON PORTIONS OF KETTLEMAN LANE, STOCKTON STREET, AND TURNER ROAD, AND THEREBY AMENDING TRAFFIC RESOLUTION NO. 97-148 ------------------------------------------------------------------ ------------------------------------------------------------------ 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 the following fourteen streets: • Beckman Road • Brandywine Drive • California Street, Lockeford Street to Turner Road • Cluff Avenue, Lodi Avenue to Turner Road • Eilers Lane • Ham Lane • Holly Drive • Kettleman Lane • Lockeford Street • Loma Drive • Rutledge Drive • Sacramento Street, Lodi Avenue to Turner Road • Stockton Street Turner Road, West City Limits to Evergreen Drive WHEREAS, of the fourteen streets surveyed, staff recommends modifying the speed limit on the following street segments: Street Segment Existing Proposed Kettleman Lane, from Highway 99 to Beckman Road (north) 40 mph 35 mph (See Exhibit A attached) Stockton Street, from Harney Lane to Kettleman Lane 45 mph 40 mph (See Exhibit B attached) Turner Rd., from the West City Limits to Evergreen Drive 55 mph 50 mph (See Exhibit C attached) NOW, THEREFORE, BE IT RESOLVED, that the City Council of the City of Lodi does hereby approve the speed limit modifications on the Street Segments as recommended above; and BE IT FURTHER RESOLVED, that the City of Lodi Traffic Resolution No. 97-148, Section 7 "Speed Limits," is hereby amended by designating speed limit modifications as recommended above. Dated: August 1, 2001 I hereby certify that Resolution No. 2001-191 was passed and adopted by the City Council of the City of Lodi in a regular meeting held August 1, 2001, by the following vote: AYES: COUNCIL MEMBERS — Hitchcock, Howard, Land, Pennino and Mayor Nakanishi NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS — None ABSTAIN: COUNCIL MEMBERS — None SUSAN J. BLACKSTON City Clerk 2001-191 F. XFTTRTT _4 J LJ it Li ^J Y lIL21�= �• y I t -< D _ I = I i i I�- ^ I ( J r I4 �- . I 1 ii II C 0 O 3 C3 . ..�Z . .. r 1' .� - Ir. Y,I Z I y I3 u� 1 z Y 1' YUT IQ TT M ,y __ y7Nnn_ � L_ tlC �7YNCC _3 CLOJi�1701 444••• cw.g ,a -,j �i u O Ixl<• :V � _ 7•Vld ��+�. � • JC• ..13ce�:» +� CCO.C74 LS 77am C:s,`.^.i ie u U TY Y W 2 `aC C•:u171C1 ,W 1 N] \ ! 10 1 I I (/ ; ' 1 r t 1 T T � I I I vl 1 9I 2i 1 61 � 4 n In I I I hl ><•1 �.1I ~I I ."71 —I• I I 71.," h h II Awl "AAL/A I I I A L _. • {� LLJ C Q� 1. 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