HomeMy WebLinkAboutResolutions - No. 92-10RESOLUTION NO. 92-10
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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 Council does hereby approve changing
the speed limit from 25 mph to 35 mph on Sacramento Street from
Lockeford Street to Turner Road, based on the speed zone survey and
narrative attached as Exhibit A, and designating the street as a
"through" street with stop signs to be installed on minor streets
intersecting Sacramento Street as shown on Exhibit B, attached hereto;
and
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 U
92-10
RES9210/TXTA.02J
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PUBLIC WORKS DEPARTMENT
SURVEY
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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 (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
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.
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
limit below the 85th percentile speed due to unexpected conditions is
not recommended.
SPEEDZ05/TXTW.02M
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 (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 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 EXISTING RECOMMENDED
Lockeford Street - Turner Road 25 mph 35 mph
Jack L. Ronsko
Public Works Director
SPE-DZO5/TXTW.02M
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