HomeMy WebLinkAboutAgenda Report - August 21, 1985 (53);w
CITY OF LODI
• PUBLIC WORKS DEPARTMENT
19
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TO: City Council
FROM: City Manager
DATE: August 14, 1985
COUNCIL COMMUNICATION
SUBJECT: Four -Way Stops at Stockton Street/Pine Street
RECOMMENDED ACTION: None
BACKGROUND INFORMATION: The City Council approved installation of four-way
stop signs at the Stockton Street and Pine Street intersection on February 20,
1985. The -additional signs on Pine Street were installed on February 26, 1985.
The Council requested a follow-up accident study in order to compare the re
sults of the four-way stop control with the previous two-way stop control at
this location. Exhibit I is an accident diagram showing three accidents
occurring -in the 5 -month period after installation of four-way stop signs.
Accident No. i - This was a rear -end accident on Stockton Street and
is -not related to the installation.of stop signs
on Pine Street.
Accident No. 2.- This was a right-angle accident which occurred
approximately two months after the conversion to
a 4 -way stop. This is the type of accident that
the 4 -way stop should have eliminated.
Accident No. 3 - This was a right-angle accident which occurred
only 8 days after the conversion to a 4 -way stop.
It appears that this accident occurred due to
the newness of the installation. As -staff indicated
to the Council, immediately upen the installation
of new stop signs, no matter what kind of advance
warning is provided, some vehicles will fail to
yield or run a new stop sign.
Exhibit 2 presents the accident diagram for a four-year, four-month period
with the previous 2 -way stop control. As shown, twenty-one (21) accidents
occurred with the majority being right-angle accidents due to failure to yield
on Stockton Street.
The four-way stop was recommended based upon the five right-angle accidents
which occurred between February 1984 and February 1985. This rate was five
accidents per year, or 0.4 accidents per month. Referring to Exhibit 1, if
City Council
August 14, 1985
Page 2
Accident No. 3 is not included, the monthly rate is 0.2. It is felt that
in using a five-month period, it is too early to make a definite statement
about overall accident reduction. It is, therefore, recommended that an
additional rvey a made after a full 12 months.
Jac L. Ronsko
Publ"i c Works Director
Attachments
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