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Home My WebLink AboutAgenda Report - January 15, 1992 (53)(fD CITY OF LODI COUNCIL COMMUNICATION AGENDA TITLE: Traffic Resolution Amendment Street to Turner Road - Speed Street Classification Sacramento Street, from Lockeford Limit Modification and "Through" MEETING DATE: January 15, 1992 PREPARED BY: Public Works Director RECOMMENDED ACTION: That the City Council adopt a resolution amending the Traffic Resolution k87-163 to change the speed limit from 25 mph to 35 mph or. Sacramento Street, from Lockeford Street to Turner Road, and designate the street as a "through" street. BACKGROUND INFORMATION: The Public Works Department has acted on an inquiry from the Municipal Court regarding the lack of an engineering and traffic survey on Sacramento Street, from Lockeford Street to Turner Road. The Court has observed a large number of drivers violating the existing 25 mile per hour (mph) prima facie speed limit. This may indicate that this speed limit is not reasonable. Staff has also received two citizen requests for a higher speed limit on this segment. This section of Sacramento Street is classified as a "local" street. Per Section 40802(b) of the California Vehicle Code, "local" streets do not require an engineering and traffic survey to be radar enforceable. The results of staff's study are shown on the speed zone survey and narrative attached as Exhibit A. This segment of Sacramento Street also conforms to the City's informal guidelines I consideration as a "through" street. Criteria for a "through" street are traffic volumes of approximately 2,000 vehicles per day and use as a minor collector. Minor cross streets intersecting" through" streets are generally controlled by stop signs. The traffic volume north of Lockeford Street is approximately 3,950 vehicles per day and the segment is being used as a minor collector. RECOMMENDATION Based on the results of the study performed on Sacramento Street from Lockeford Street to Turner Road, staff recommend- that Council approve the speed limit modification from 25 mph to 35 mph. Staff also recommends that Council establish this segment of Sacramento Street as a "through" street. Stop signs will be installed on minor streets intersecting Sacramento Street as shown on Exhibit B. APPROVED--- T140MAS A. PETERSON -....,.,.. city Manager CC-: CCSACRAM/TXTW.01L (CO -COM) January 7, 1992 Traffic Resolution Amendment - Sacramento Street, from Lockeford Street to Turner Road - Speed Limit Modification and "Through" Street Classification January 15, 1992 Page 2 This recommendation has been reviewed by the Police Department and the Court. The Police were concerned about the amount of loading that takes place on the street. Since this condition is readily apparent to the driver and double parking is prohibited by Vehicle .:ode Section 22500(h), staff and the Court feel the recommended speed limit is reasonable. FUNDING: Funding to be provided by the Street Maintegance Account. Jack L.. Ronsko Public�orks Director Prepared by Rick Kiriu, Senior Engineering Technician JLR/RSK/lw Attachment cc: City Attorney Police Chief Street Superintendent Municipal Court Judges Assistant Civil Engineer Concerned Citizens CCSACRAM/TXTW.01L (CO.COM) January 7, 1992 _l a,rar� �IIli� O I _ f`II1 to irZ 1 1 I I 4 r-----—--�—� ' I 1 � f > n0� I N N � Fes' �z 7 Z�K A O I _ T777--7-Exhibit to irZ 1 1 I I 4 r-----—--�—� ' I O W Icy W 2> V O > n0� m N N � Fes' �z 7 Z�K Z W W¢ Q F a � co I 0 z w - Q cc U U) � T 1 F W� O I _ O 4 to irZ EINI �Ci� > W Fes' �z 7 Z�K Z W~ W¢ w u a a � m I 'WILL J a 1 1 � T 1 F W� O I _ O 4 to irZ EINI 7I > W a �z 7 Z�K Z W~ W¢ w u a a � m _— 1.L. I _ 11 s� d � o �, •1 _ u m 1 1 I I 1 11 I � I 'WILL J a 1 1 January 1992 SPEED 700E REPORT - Sacramento Street Speed zone surveys are performed i n the City of Lodi following State of California Department of Transportation (Caltrans) quidelines. in accordance with Section 40802(b) of the California Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. STUDY Important factors to consider i n determining the Speed I i m it which is most appropriate to facilitate the orderly movement of traffic and that i s reasonably safe are prevailing speeds, unexpected conditions to drivers, and accident records. Prevailing Speeds (85th Percentile Speeds) Reasonable speed I i m i is conform to the actual behavior of the majority of motorists, and by measuring motorists' speeds. one w i I I be able to select a speed I i m i t that i s 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 comnunity. engineering judgement may indicate the need for a further reduction of five miles per hour. Four radar surveys were performed and the 85th percentile speeds ranged from 34 to 37 mph as shown below: Sacramento Street Segment Northbound Southbound Lockeford Street - Turner Road 35-36 mph 34-37 mph Unexpected Conditions When roadside development results i n 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. Although there are two sections on the east side of this segment without concrete sidewalk, the areas are paved allowing pedestrian travel. A large number of commercial driveways also exist along this segment, however, no accidents occurred at these driveways. Reducing the speed I i m i t below the 85th percentile speed due to unexpected conditions i s not recommended. SPEEDZ05/TXTW.02M SPEED ZONE REPORT - `•a�ramerstc Stmt age 2 Accidents Accident records of the two most rrcent years were considered in determining 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 city-wide accident rate was 4.7 ACC/MVM. The accident rate between Lockeford Street and Turner Road is 3.86 ACC/MVM. This rate is below the city-wide average. Only one of the six accidents was speed related. Reducing the speed limit below the 85th percentile speed due to accident rate i s not recommended. ° CONCLUSION Lockeford Street to Turner Road Between Lockeford Street and Turner Road, a posted speed I i m i t of 35 mph is appropriate based on the 85th percentile speeds observed in the field, unexpected conditions, and the accident data. The existing and recommended speed limits are shown below: SACRAMENTO STREET SEGMENT Lockeford Street - Turner Road Jack L. Ronsko Public Works Director SPEEDZ05/TXTW.02M EXISTING RECOMMENDED 25 mph 35 mph CITY OF LODI PUBLIC WORKS DEPARTMENT TIAIzp ei?- V --p F N 0 Exhibit B o�-tom To fa -i-j �.. e U E� �-j r� RESOLUTION NO. 92-10 A RESOLUTION OF THE LODI CITY COUNCIL APPROVING SPEED LIMIT MODIFICATION ON SACRAMENTO STREET FROM LOCKEFORD STREET TO TURNER ROAD AND DESIGNATING THE STREET AS A "THROUGH" STREET, THEREBY AMENDING TRAFFIC RESOLUTION NO. 87-163 RESOLVED, that the Lodi City the speed limit from 25 mph to Lockeford Street to Turner Road, narrative attached as Exhibit A, "through" street with stop signs intersecting Sacramento Street as and Council does hereby approve changing 35 mph on Sacramento Street from based on the speed zone serve; and and designating the street as a to be installed on minor streets shown on Exhibit B, attached hereto; BE IT FURTHER RESOLVED, that City of Lodi Traffic Resolution 87-163, Section 7 - Speed Limits and Section 2(B) "Through* Streets are hereby amended by changing the speed limit from 25 mph to 35 mph on Sacramento Street from Lockeford Street to Turner Road and designating the street as a "through" street. Dated: January 15, 1992 I hereby certify that Resolution No. 92-10 was passed and adopted by the Lodi City Council in a regular meeting held January 15, 1992 by the following vote: Ayes: Council Members - Hinchman, Pennino, Sieglock, Snider and Pinkerton (Mayor) Noes: Council Members - None Absent: Council Members - None Alice M. Re imche City Clerk 92-10 RES9210ITXTA.02i �NGIN�,R N�i ANO TRAFFIC W VEY •�c i II, 1 SEE NARRATIVE FOR BACKGROUND INFORMATION 48� ebT9 UC SPEEOTABLE - noaowAY tn-cf LANES wFDiAN (7YPEI TRAFFIC PGNAL DATA AYEAAGE DAILY TRAFFIC gA 0 065. SPEED-CAITICA�,65' G ^' 7y'� y ------•• E i� � `_ ► to -PACEiX)_ G �+�� 'N•�� -(MEDIAN: % 71�j - _—_ 1Me !![STING SPEED 20FIE PA SO SPEED ZONE LggEN MPH SKED GROH "r - 144 LDunDM RI -STv SGN R21 ! -SPEED LSI► SCA aWI, R39 -Ti[L0 $414 — - , tS:�CN iS NPn •,- a - IaurnC %NAL 1114 -Ci Tr LANT . - _CIIdt CSL S+ELD lam' e# _- -tCMLN LMNt OI INCE ACCIDENT PLOT ACCIDENT AATE ^ ACC AAILL. VEH -MI. ---------- --------� __ _ __ —_ .—_ �. - K 77`T CITY OF l O D I SACRAMENTO STREET zor l° �` ^o..a-^�.. �,•,� f.N�a �••a N.a�yf.r ��I PUBi1CWQPifSUIPAAFMtIIt SURVEY 8613004 A January 1992 SPEED ZONE REPORT - Sacramento Street REFERENCE Speed zone surveys are performed in the City of Lodi following State of California Department of Transportation (''zltrans) guidelines in accordance with Section 40802(b) of the U=iifornia Vehicle Code. These guidelines are outlined in Chapter 8 of the Caltrans Traffic Manual. ° STUDY 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, unexpected conditions to drivers, and accident records. 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 judgement may indicate the need for a further reduction of five miles per hour. Four radar surveys were performed and the 85th percentile speeds ranged from 34 to 37 mph as shown below: Sacramento Street Segment Northbound Southbound Lockeford Street - Turner Road 35-36 mph 34-37 mph 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. Althouh there are two sections on the east side of this segment without concrete sidewalk, the areas are paved allowing pedestrian travel. A large number of commercial driveways also exist along this segment, however, no accidents occurred at these driveways. Reducing the speed limit below the 85th percentile speed due to unexpected conditions is not recommended. SPEEDZ05/TXTU.0214 3 SPEED ZONE REPORT - Sacramento Street Page 2 Accidents Accident records of the two most recent years were considered in determining 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 MUM). The average city-wide accident rate was 4.7 ACC/MVM. The accident rate between Lockeford Street and Turner Road is 3.86 ACC/MM. This rate is below the city-wide average. Only one of the six accidents was speed related. Reducing the speed limit below the 85th percentile speed due to accident rate is not recommended. CONCLUSION Lockeford Street to Turner Road Between Lockeford Street and Turner Road, a posted speed limit of 35 mph is appropriate based on the 85th percentile speeds observed in the field, unexpected conditions. and the accident data. The existing and recommended speed limits are shown below: SACRAMENTO STREET SEGMENT Lockeford Street - Turner Road Jack L. Ronsko Public Works Director SPEEDZ05/TXTW.02M EXISTING REC0MMENDED 25 mph 35 mph CITY QF LODI PUBLIC WORKS DEPARTMENT Tow z V4799f.jeor �%vfl�-' F �2efapm�; AoA s Exhiht E CITY COUNCIL IAMES Wt P040MON. Mayat PI-KUP A. PENNINO Minor Pra Its wore O^nD M. HP4CHMAid ;ACK A. SIEGIOCK IC *4N IL may) SN"xW CITY OF LODI CITY HALL. 221 WEST FINE STREET PJU BOD( 3006 Imo. CALIFORNIA 95241-1910 (209) 3345634 ►AX Rw" "30" January 8, 1992 THOMAS A PETERSON City Manager ALKE M REIMCHE City Cleric BOB WNA- T City Attorney SUBJECT: Traffic Resolution Amendment - Sacramento Street. from Lockeford Street to Turner Road - Speed Limit Modification and *Through" Street Classification Dear Mr. Hansen: Enclosed is a copy of background information on an item that w i I I be discussed at the City Council meetfnq on Wednesday, January 15, 1992, at 7:30 p.m. The meeting w i I I be held i n the City Council Chamber. Carnegie Forum, 305 West Pine Street. You are welcome to attend. If you wish to comawnicate with the City Council, please contact Alice Reimche, City Clerk. a t (209) 333-6702. If you have any questions about the item, please call Rick K i r i u or me at (209) 333-6706. JLR/lm Ronsko Works Director Enclosure f cc: City Clerk✓/ CCSACRA].NOC/TXTW.OIL PA43 W PNOWERTON, mw,Q• PHILLIP A. PBOJ840 Marto► Pro Telae DAnD M. FMNCH AAN JACK A. SIEGLM )OHlN IL abrxf l SMDER CITY OF LODI CITY HALL, 221 WEST PINE STREET P.O BOX 3006 LODI, CALIFORNIA 95241-1910 (209) 3345634 KX 12M 333-"S January 8, 1992 THOMAS A. PMRSON Cay manw ALICE M. REIMCHE Cary Clerk 806 WKATT City Anorney SUBJECT: Traffic Resolution Amendment - Sacramento Street, from Lockeford Street to Turner Road. - Speed Limit Modification and "Through" Street Classification Dear M r . Kalange: Enclosed is a copy of background information on an item that w i 11 be discussed at the City Council meeting on Wednesday. January 15. 1992. at 7:30 p.€n, The meeting will be held in the City Council Chamber, Carnegie Fbrm. 305 West Pine Street. Yca are welcome to attend. If you wish to carrimnicate with the City Council, please contact Alice Reinchye, City Clerk, at (209) 333-6702. If you have any questions about (209) 333-6706. Jack . °3nsko Works Director JLR/1m Enclosure cc: City Clerk CCSACRAM,NOC/TXTW.UtL the item. please call Rick Kiriu or me at