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Home My WebLink AboutAgenda Report - October 20, 2010 D-09AGENDA ITEM s.Opt yOF� a. Oo OF LODI COUNCIL COMMUNICATION AGENDA TITLE: Adopt Resolution Approving Updated Engineering and Traffic Surveys on Almond Drive, CrescentAvenue (Kettleman Lane to Lodi Avenue), and Harney Lane (West City Limits to East City Limits) Resulting in No Change to Existing Speed Limits MEETING DATE: PREPARED BY: October 20,2010 Public Works Director RECOMMENDED ACTION: Adopt a resolution approving updated Engineering and Traffic Surveys on Almond Drive, CrescentAvenue (Kettleman Lane to Lodi Avenue), and Harney Lane (west City limits to east City limits) resulting in no change to existing speed limits. BACKGROUND INFORMATION: Staff recently reviewed Engineering and Traffic Surveys on Almond Drive, CrescentAvenue from Kettleman Lane to Lodi Avenue, and Harney Lane from the west City limits to east City limits. Based on this State -mandated review, staff is recommending no changes to the existing speed limits (ExhibitA). The Engineering and Traffic Surveys consider three primaryfactors: prevailing speeds; accident rates; and conditions a driver would not expect. Other characteristics, such as residential density, pedestrian and bicycle safety, and shoulder conditions, are also considered. The Police Department has not expressed any concerns regarding the proposed speed limits. A map showing speed limits on surveyed streets within the City is attached as Exhibit B. FISCAL IMPACT: Not applicable. FUNDING AVAILABLE: Not applicable. Prepared by Rick S. Kiriu, Senior Engineering Technician FWS/RSK/pjt Attachments cc: CityAttorney Police Chief Police Sergeant Jacobsen Senior Civil Engineer Chang Streets and Drainage Superintendent APPROVED: KNPURAFFIMCSpeed zone survey201 MOO J� .,/- JZAf..4. A F. Wally S ndelin Public Works Director Konradt Bartlam, Interim City Manager 10/13/2010 ENGINEERING_ AND TRAFFIC SURVEY S Z SEE NARRATIVE FOR ° 2,600' N BACKGROUND INFORMATION ; W � U R1-1 Ri-1 T' i R1-1 T Z Ul s -R1-1 I I Iia Y R1-1 IIII O II II w 0 o a a O II II p LU U 0 N Of I I I I Q 0 I I 0 z ALMOND DR —1 a a U J m cn 1/2 MII E SPEED TABLE ROADWAY WIDTH 44' MEDIAN (NPE) NONE TRAFFIC SIGNAL DATA NONE AVERAGE DAILY TRAFFIC 3,345 OBS SPEED—CRITICAL,85th% EB 36 7U WBI 39 36 —PACE(%) EBI 32 31 WBI 33 31 —MEDIAN,50th% EB 28-38(88) 26-36(74) W8 29-39(781, 77-37(76) EX'Sl-SPEED ZONE 30 mnh PROPOSED SPFFD 70NE 30 m h LEGEND: MPH SPEED GRAPH T —SIGN LOCATION - ---. RI -1 —STOP SIGN /� R2-1( ) —SPEED LIMIT SIGN (MPH) '} 0 - -- - - RI— 2 —YIELD SIGN ,. _. ...... EB... C —ASSEMBLY C 25 MPH SIGN)0 (SCHOOL WI—X —CURVE WARNING SIQi _ W13-1( ) —CURVE ADVISORY SPEED I.111C SIGNAL 20 _ —CITY LIMIT — _CRITICAL SPEED —LOWER LIMIT OF PACE - --- ACCIDENT PLOT YR: 2008 1 1 1 1 YR: 2009 1 1 ACCIDENT RATE—ACC. MILL. VEH.—MI. 55.0 °R RS K No. Dote Revision `" JAppllAppro,,d By CITY 0 F LO D I ALMOND D R SPEED . ZONE DATE: OCt 201 0 TRa;e6zsa11on Mgr/Sr Traffic Engineer D°1e PUBLIC WORKS DEPARTMENT Stockton to Cherokee SURVEY E October 2010 SPEED ZONE REPORT -Almond, Drive O 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 (ACCIMVM). The average Citywide accident rate is 3.5 ACCIMVM. 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 Four radar surveys were performed and the 85th percentile speeds ranged from 36 to 39 mph as shown below. Street Segment Eastbound Westbound Stockton Street to Cherokee Lane 36 mph 36-39 mph Stockton Street to Cherokee Lane The 85th percentile speeds on this segment range from 36 to 39 mph. The 50th percentile speeds range from 31-33 mph. The accident rate of 5.0 is above the City- wide average and below the 6.0 rate from the 2003 survey. Based solely on the prevailing speeds, the speed limit could be set at 35 mph; however based on the continuing higher than average accident rate, we recommend retaining a 30 mph speed limit on this segment. CONCLUSION The recommended speed limits are shown below: STREET SEGMENT Stockton Street to Cherokee Lane Paula J. Fernandez Transportation Manager/Senior Traffic Engineer POSTED SPEED LIMIT 30 mph (no change) CIVVIIVCCRIIVV AND TRAFFIC SURVEY 1,300' SEE NARRATIVE FOR1,300' BACKGROUND INFORMATION 1,325' 1,325' 0 Q > LEROY NICHOLS v ~O p ,� j v < SCHOOL ¢ v R1-1 C Rt -1 R1 R1 1 R1-1 R1 R1 1 = < of z} I }¢ ~I�Rl Of i Q co z< T T T T W R1 1 D R7� 1 t Rt 1 R7 i y {. R1-tI' Rt -1 � P1 -1y R1-1 p Rt -1 R1 -1R1 C � R1-1 R1-Jzw- -1F < I m_ It (L z_ z_ = Q U �01 U > < < CRESCENT AVE. 1/2 MILE T 1/2 MILE SPEED TABLE ROADWAY WIDTH 49' NO OF IAN S 2 w Bike Lane MEDIAN TYPE NONE TRAFFIC SIGNAL DATA 60 Act 2 2 Act AVERAGE DAILY TRAFFIC 2,765 2,500 2,310 OBS. SPEED—CRITICAL,85th% NBI 36 35 35 SE 36 35 34 —PACE (%) NE 32 31 31 SE 32 31 30 —MEDIAN 50th% NF 29-39(83) 27-37(87) 27-37(82) si 27-37(86) 27-37(81) 25-35(77) PROPOSED SPEED ZONF — 35 mph LEGEND: MPH SPEED GRAPH - - - T -SIGN LOCATION R7-1 -STOP SIGN /I - -- -- _ - -- R2-1( ) -SPEED LIMIT SIGN (MPH) `-j'- 0 Rt ni:D _ .. - .... -2 -YIELD SIGN , S-. _... C -ASSEMBLY C---' (SCHOOL . MPH SIGN) -- - - - - _ - 30 NB �— - W1 -X -CURVE WARNING SIGN "' --- -- — ---- .- - - - W73-1( ) -CURVE ADVISORY SPEED - - SB -TRAFFIC SIGNAL -CIN LIMIT — -CRITICAL SPEED -LOWER LIMIT OF PACE 2 O ... ...... . .. - _... - ..... .... -- - - "'--` . - ACCIDENT PLOT YR. 2008 0 1 0 YR. 2009 1 1 0 0 ACCIDENT RATE—ACC./MILL. VEH.—MI. 2.0 2.2 0.0 °R` RSK No. Date CH: Revision PPr Approved By • CIIY OF LODI CRESCENT AVE. SPEED ZONE DATE: Transportation Mgr/Sr Traffic Engineer Daf• PUBLIC WORKS DEPARTMENT Lodi Ave. to Kettleman Ln. SURVEY ) Oct '201 0 R 1625 October 2010 SPEED ZONE REPORT - Crescent Avenue, Kettleman Lane to Lodi Avenue 0 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. 0 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 3.5 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 34 to 36 mph as shown below. Street Segment Kettleman Lane to Vine Street Vine Street to Tokay Street Tokay Street to Lodi Avenue Crescent.doc Northbound Southbound 36 mph 36 mph 35 mph 35 mph 35 mph 34 mph Kettleman Lane to Vine Street The 85t percentile speed on this segment is 36 mph. The 50th percentile speed is 32 mph. The accident rate of 2.0 is below the Citywide average and lower than the 3.4 rate from the 2003 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 speed on this segment is 35 mph. The 50th percentile speed is 31 mph. The accident rate of 2.2 is below the Citywide average and lower than the 0.0 rate from the 2003 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 speeds on this segment range from 34 to 35 mph. The 50th percentile speeds ranged from 30 to 31 mph. The accident rate of 0.0 is below the Citywide average and slightly less than the 2.0 rate from the 2003 survey. Based on prevailing speeds and continuing low accident rate, we recommend retaining the 35 mph speed limit 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 Crescent.doc Posted Saeed Limit 35 mph (no change) 35 mph (no change) 35 mph (no change) LN(jINF717HINU AND TRAFFIC SURVEY SEE NARRATIVE FOR BACKGROUND INFORMATION 650' 7,285'2,650' a 2,190 N m z N p o _ �, R11 n E a i R,-,� RI R,- N�E SQA _ Q - VzT EsEl w a< HARNEY LN. 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE 1/2 MILE SPEED TABLE ROADWAY WIDTH County 23' County 50' 40 - 28'-50' 22'-50' NO. OF LANES County 2 County 2+TWLTL+Bike Ln 2+TWLTL 2 MEDIAN (TYPE) County None County NONE TRAFFIC SIGNAL DATA 8 0 Act 8 0 Act 6 0 Act AVERAGE DAILY TRAFFIC 7,360 (9,130) 10,900 15,690 12,550 OBS. SPEED—CRITICAL,85th% EB 52 49 46 45 WE 50 45 45 45 —PACE(%) EB 46 44 42 41 WE 45 41 41 42 —MEDIAN,50th% EB 43-53(70) 39-49(79) 38-48(83) 36-46(81) WE 42-52(80) 35-45(78) 35-45(77) 37-47(83) EXISTING SPEED ZONE 25(C.-ty) 45(C.—tY) 45 mph 45 mph PROPOSED SPEED ZONE 25(co°ntY) f s Not 45(co-ty) 45 m h 45 mph LEGEND: MPH SPEED GRAPH T -SIGN LOCATION R7-1 -STOP SIGN 50 EB --- ---" - --- _ - - - - - - -- ' R2-1() -SPEED LIMIT SIGN (MPH) - - ----_,_ - - - --_, R1-2 -YIELD SIGN C -ASSEMBLY C (SCHOOL 25 MPH SIGN) 40 Wt -X -C CURVE WARNING SIGN W13-1( ) -CURVE ADVISORY SPEED -TRAFFIC SIGNAL ® 30 . -CIN LIMIT _ _CRITICAL SPEED -LOWER LIMIT OF PACE ...... i _.... ... .. _. ...... ,. - .. __ .... _. ..... -_ _.. ACCIDENT PLOT YR: 2008 1 1 1 1 1 1 1 1 1 1 1 1 1 1111 1 1 1 1 YR: 2009 4 1 1 11 1 1 1 1 1 1 1 1 1 1 1 1 1 ACCIDENT RATE—ACC./MILL. VEH.—MI. 2.2 3.1 1.1 °R RSK No. Date cn: Revision PPr APP,oved By C IlY 0 F LO D I HARNEY L N SPEED . ZONE DATE: Oct 201 0 Tro°sFona,i°n Mgr/Sr Traffic Engineer ome TR 1625 PUBLIC WORKS DEPARTMENT West City Limits to East City Limits SURVEY October 2010 SPEED ZONE REPORT - Harney Lane, West City Limits to East City Limits 0 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. 0 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 3.5 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 Eight radar surveys were performed and the 85th percentile speeds ranged from 45 to 52 mph, as shown below: Segment Eastbound Westbound West City Limits to Lower Sacramento Rd N/A N/A 980' West of Legacy Wy to Hutchins St 49-52 mph 45-50 mph Hutchins Street to Stockton Street 46 mph 45 mph Stockton Street to East City Limits 45 mph 45 mph West City Limits to Lower Sacramento Road This portion of Harney Lane is a short (660') isolated segment surrounded by portions under San Joaquin County's jurisdiction. Due to its short length and close proximity to the signalized intersection at Lower Sacramento Road it is not possible Harney.doc to obtain the measurement of vehicle speeds needed to establish an enforceable speed limit. The County is currently reviewing their portion of this segment. Until the County is able to determine an enforceable speed limit, this portion of Harney Lane will remain posted at an unenforceable 25 mile per hour speed limit. 980' West of Legacy Way to Hutchins Street The 85' percentile speeds on this segment range from 45 to 52 mph. The 50th percentile speeds range from 41 to 46 mph. The accident rate of 2.2 is below the citywide average and slightly higher than the 1.7 rate from the 2003 survey. Based on the prevailing speeds and continuing low accident rate, we recommend retaining the 45 mph speed limit on this segment. Hutchins Street to Stockton Street The 85th percentile speeds on this segment are 45 and 46 mph. The 50th percentile speeds are 41 and 42 mph. The accident rate of 3.1 ACC/MVM is slightly below the citywide average and higher than the 1.7 rate from the 2003 survey. Based on the prevailing speeds and reasonable accident rate, we recommend retaining the 45 mph speed limit on this segment. Stockton Street to East City Limits The 85th percentile speed on this segment is 45 mph. The 50th percentile speeds are 41 and 42 mph. The accident rate of 1.1 ACC/MVM is below the citywide average and slightly higher than the 0.6 rate from the 2003 survey. Based on the prevailing speeds and continuing low accident rate, we recommend retaining the 45 mph speed limit on this segment. ° CONCLUSION The recommended speed limits are shown below: Street Segment West City Limits to Lower Sacramento Road 980' West of Legacy Way to Hutchins Street Hutchins Street to Stockton Street Stockton Street to East City Limits Paula J. Fernandez Transportation Manager/Senior Traffic Engineer Harney.doc Posted Speed Limit 25 mph (unenforceable) 45 mph (no change) 45 mph (no change) 45 mph (no change) EXHIBIT B POSTED SPEED LIMITS 403( 0 45 rn Z 0 30 a 3 TURNER ' ¢ WID Canal v U � 35 CITY LIMIT z 35 I� z �� z CITY 0 (4�)U = O LIMIT �0<<Y 30 35 o o� 00 -(`0)- FILERS 3 2 35 LOCKEFORD 40 35 < 40 U 1 35 w 3035 CD 30 0 A Uj ?(30 3 5 w �Y EXHIBIT B POSTED SPEED LIMITS 403( ' LODI 45 rn 0 30 a 3 TURNER ' 40 U � 35 VINE z 35 I� z �� 0 (4�)U �0<<Y 30 35 35 PIONEER— = 45 2 m LOCKEFORD < 40 U 35 35 3035 35 3 5 I P NE(ZS}I__-- —44 'I v 403( ' LODI 45 0 30 TOKAY z Ld — 35 35 U � 35 VINE � 3 30 4 0 'OT J J_ U = 45 KETTLEMAN 11 U 5 (HWY 12) BRANDYWINE` I .--(30?—_ CENTURY HARNEY V) to n o J J J d } } *—NOT RADAR ENFORCEABLE )R (HWY 12) 45 -�40 Y g UOfJ ¢ I U_ O � U I VINE z 1 J ¢ Y I z 0 35 w 40 m ) U Y AUTO CENTER' 35 0 O w NOTE: The speed limits shown on this map are in miles per hour. The speed limit on streets within the City not shown on this map are 25 miles per hour. ALMOND U r1 45 rn CENTURY 40 V REVISED: OCTOBER 2008 RESOLUTION NO. 2010-180 A RESOLUTION OF THE LODI CITY COUNCIL APPROVING UPDATED ENGINEERINGAND TRAFFIC SURVEYS ON ALMOND DRIVE, CRESCENT AVENUE (KETTLEMAN LANE TO LODI AVENUE), AND HARNEY LANE (WEST CITY LIMITS TO EAST CITY LIMITS) RESULTING IN NO CHANGE TO EXISTING SPEED LIMITS WHEREAS, staff recently reviewed Engineering and Traffic Surveys on Almond Drive, Crescent Avenue (Kettleman Lane to Lodi Avenue), and Harney Lane (west City limits to east City limits). Based on this State -mandated review, staff is recommending no changes to the existing speed limits; and WHEREAS, the Engineering and Traffic Surveys consider three primary factors: prevailing speeds; accident rates; and conditions a driver would not expect. Other characteristics, such as residential density, pedestrian and bicycle safety, and shoulder conditions, are also considered; and WHEREAS, the Police Department has not expressed any concerns regarding the proposed speed limits. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby approve the updated Engineering and Traffic Surveys on Almond Drive, Crescent Avenue (Kettleman Lane to Lodi Avenue), and Harney Lane (west City limits to east City limits) and no change to existing speed limits be made. Dated: October 20, 2010 I hereby certify that Resolution No. 2010-180. was passed and adopted by the City Council of the City of Lodi in a regular meeting held October 20, 2010, by the following vote: AYES: COUNCIL MEMBERS— Hansen, Hitchcock, Johnson, Mounce, and Mayor Katzakian NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS— None ABSTAIN: COUNCIL MEMBERS— None JOHL City Clerk 2010-180