HomeMy WebLinkAboutAgenda Report - April 2, 2003 E-0971
A4
I
!M
CITY OF LODI
COUNCIL COMMUNICATION
AGENDA TITLE: Adopt Resolution Amending Traffic Resolution 97-148 Approving a
30 -Mile -Per -Hour Speed Limit on Mills Avenue from Harney Lane to
Century Boulevard
MEETING DATE: April 2,2003
PREPARED BY.- Public Works Director
RECOMMENDED ACTION-. That the City Council adopt a resolution amending Traffic Resolution 97-148
approving a 30 -mile -per -hour (mph) speed limit on Mills Avenue from
Harney Lane to Century Boulevard, as shown on the attached Engineering
and Traffic Survey (Exhibit A).
BACKGROUND INFORMATION.: The portion of Mills Avenue south of Century Boulevard to
Harney Lane was accepted by City Council in October of 2002. Per
Section 40802(b) of the California Vehicle Code, in order to radar
enforce vehicle speeds on this portion of Mills Avenue, a valid
Engineering and Traffic Survey mLJSt exist. This portion of Mills Avenue has no existing survey.
Engineering and Traffic Surveys are performed based upon State of California Department of
Transportation (' Caltrans) guidelines. The surveys include a map showing the physical characteristics of
the roadway, such as roadway width, number of thfough lanes, and traffic controls. Traffic volumes,
prevailing speeds, and accidents are analyzed and the results are provided in a written narrative for each
st,,eet. The following three factors are considered when determining speed limits.
Prevailing _5Rqqqs (8 5th Percentile Speeder - 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 5 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 and residential
driveway characteristics; residential density; and pedestrian and bicycle safety.
Accidents - Accident records for the two most recent years are considered when determining speed
FIM—it—s. 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 4,1 ACC/MVM. No accidents were reported on this segment of
Mills Avenue since it was extended south to Harnev Lane.
APPROVED�
C CM 1 peed20103
Dixon Flynn .- City Manager
0X24/03
Adopt Resolution Amending Traffic Resolution 97-148 Approving a 30 -Mile -Per -Hour Speed Limit on
Mills Avenue from Harney Lane to Century Boulevard
April 2, 2003
Page 2
STUDY RESULT & This portion of Mills Avenue requires a valid Engineering and Traffic Survey in order
to establish an enforceable speed limit. used solely on the 851h percentile speeds, the speed limit on
this segment could be posted at 35 mph; however, based on the density of residences in the area, and
that bike lanes will be completed on this segment when the roadway is fully widened, reducing the speed
limit to 3.0 rnph is recommended. This speed limit is also consistent with the other portion of
Mills Avenue.
RECONIMENDATIONtaff recommends that City Council approve the speed limit as shown below.
StreetqLtrit istirPr_
oposed
Mills Avenue, Harney Lane to Century Boulevard N/A 30 mph
FUNDING: Funding to provide the speed limit signs and pavement legends at an approximate cost of
$250 is to come from the Street Maintenance Account.
Prepared by Rick S, Kiriu Senior Engineering Technician
RGP/RSK1pmf'
Attachments
cc: City Attorney
Policn Chief
City 'Engineer
Street Superintendent
Senior 'Traft Engineer
Concerned Citizens
April 2003
�jl`EED ONE REPORT -- Mills Avenue, Harney Lane to Century Boulevard
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.
D
STUDY CRi-rERIA - 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:
ELeyailinq-S,p-e-e-d5-J8-5th - 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.
Vatx ected Cortditsar - 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 & residential driveway
characteristics, residential density, and pedestrian & bicycle safety,
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). There
have been no accidents on this portion of Mills Avenue. The average Citywide
accident rate is 4.1 ACC/MVM.
STUDY RESULT
Two radar surveys were performed and the 85th percentile speeds ranged from 37
to 40 mph as shown below,
Street §q�mentt Northbound Southbound
Harney Lane to Century Boulevard 37-39 mph 40 mph
The 85th percentile speed on this segment ranged from 37 to 40 mph. The 50th
percentile speeds ranged from 32 to 35 mph. This portion of Mills Avenue was
extended south of Century Boulevard to Harney Lane in October of 2002 and there
were no reported accidents on this segment. Based solely on the B51h percentile
speeds, the speed on this segment could be posted at 35 mph; however,
considering the residential density and that bicycle lanes will be completed on this
segment of Mills Avenue when it is fully developed, we recommend establishing a 30
mph speed limit on this segment.
Wish
�EEE:D ZONE REPORT - Century Boulevard, West City Limits to Cherokee Lane
Page 2
CONCLUSION
The recommended speed 4imils are shown below-.
STREET SEGMENT
Harney Lane to Century Boulevard
F Wally Sandelin
City Engineer
WHEREAS, the portion sof Mills Avenue south of Century Boulevard to Harney Lane was
accepted by the City Council in October 2002; and
WHEREAS, per §40802(b) of the California Vehicle Code, in order to radar enforce
vehicle speeds on this portion of Mills Avenue, a valid Engineering and Traffic Survey must
exist. This portion of Mills Avenue has no existing survey; and
WHEREAS, Engineering and Traffic Surveys are performed based upon the State of
California Department of "transportation (Caltrans) guidelines; and
WHEREAS, the surveys include a wrap showing the physical characteristics of the
roadway, such as roadway width, number of through lanes, and traffic controls. Traffic
volumes, prevailing speeds, and accidents are analyzed arta the results are provided in a
written narrative for each street, and
WHEREAS, throe factors are considered when determining speeds limits, they are as
follows. ) Prevailing Speeds (85'h Percentile Speeds); ) Unexpected Conditions; and )
Accidents; and
WHEREAS, the Public Works Department recently performed an Engineering and
Traffic Survey on Mills Avenue from Marney Lame to Century Boulevard and recommends
approval of the speed limit as shown below. -
Mills Avenue, Harney Lane to Century Boulevard N/A 30 mph
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Lodi dotes
hereby approve the 30 mile per hour speed limit on Mills Avenue from Harney Lane to
Century Boulevard as shown above; and
BE IT FURTHER RESOLVED that the City of Lodi `traffic Resolution leo, 97-148,
Section 7, "Speed Limits," is hereby amended by designating the 30 utile per hour speed
limit on Mills Avenue from Harney Lane to Century Boulevard.
Dated, April 2, 2003
I hereby certify that Resolution No. 2003-52 was passed and adopted by the C4
Council of the City of Lodi in a regular meeting hold April 2, 2003, by the following vote:
AYES: COUNCIL MEMBERS — Beckman, Hansen, Howard, Land, and Mayor
Hitchcock
NOES: COUNCIL MEMBERS — None
CITY COUNCIL
SUSAN HITGHC0C1<T Mayor
EMILY j-1OVVARD
Mayor Pro Ternpore
JOHN BECKMAN
LARRY D. HANSEN
KEITH LAND
Nicholas & Lisa Nunez
1966 Norfolk Drive
Lodi, CA 95242
CIT17
PUBLIC WORKS DEPARTMENT
CITY HALL, 221 WEST PINE STREET
P.0- BOX 3006
YOGI, CALIFORNIA 95241-1910
(209) 333-6706
FAX (203) 333-6710
EMAIL owdept@ic)di.gov
11t1p:1,Nwww,Io di,gov
March 27, 2003
Tina M. Guerrero
2328 Mills Avenue
Lodi, CA 95242
H. DIXON FLYNN
City Manager
SUSAN J,BLACKSTON
City Clerk
RANDALL A. HAYS
City Attorney
RICHARD G. PRIMA, JR.
Public Works Director
SUBJECT: Adopt Resolution Amending Traffic Resolution 97-148 Approving a
30-Mile-Fler-Hour Speed Urnit on Mills Avenue from Harney Lane to
Century Boulevard
Enclosed is a copy of background in -formation on an item on the City Council agenda of
Wednesday, April 2, 2003, The meeting will be held at 7 p.m. in the
City Council Chamber, Carnegie Forum, 305 West Pine Street.
This itern is on the regular calendar for Council discussion. You are welcome to attend,
If YOU wish to write to the City Council, please address your letter to City Council,
City of Lodi. P. 0, Box 3006, Lodi, California, 95241-1910, Be sure to allow time for the
mail. Or-, you may hand -deliver the letter to City Hall, 221 West Pine Street.
If you wish to address the Council at the Council Meeting, be sure to fill out a speaker's
card (available at the Carnegie Forurn immediately prior to the start of the meeting) and
give it to the City Clerk, If you have any questions about communicating with the
Council, please contact Susan Blackston, City Clerk, at 333-6702.
If you have any questions about the item itself, please call Rick Kiriu,
Senior Engineering Technician, at 333-6800, extension 2668.
Richard C. Prima, Jr.
Public Works Director
RCP/pmf
Etidosure
cc: City Clerkvl_,�
NG0MU,S SPEE�;2003