HomeMy WebLinkAbout2011/11/15 Item 07CITY COUNCIL
~~ AGENDA STATEMENT
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CHULA VISTA
11/15/ll, Item
ITEM TITLE: ORDINANCE OF THE CITY OF CHULA VISTA ESTABLISHING
A 35 MPH SPEED LIMIT ON DUNCAN RANCH ROAD
BETWEEN PROCTOR VALLEY ROAD AND STONE GATE
STREET AND AMENDING SCHEDULE X OF THE REGISTER
MAINTAINED IN THE OFFICE OF THE CITY ENGINEER TO
REFLECT THE ESTABLISHED SP D IMIT
SUBMITTED BY: DIRECTOR OF PUBLIC WORKS
ASSISTANT DIRECT R OF ENG
REVIEWED BY: CITY MANAGER
ASSISTANT CITY ANAGER~
4/STHS VOTE: YES ^ NO
SUMMARY
Based on the provisions of California Vehicle Code (CVC) Sections 22357 and 22358 and
pursuant to authority under Chula Vista Municipal Code (CVMC) Section 10.48.020, the City
Engineer has determined that a 35 mph speed limit be established on Duncan Ranch Road
between Proctor Valley Road and Stone Gate Street.
ENVIRONMENTAL REVIEW
The Director of Development Services has reviewed the proposed activities for compliance with
the California Environmental Quality Act (CEQA) and has determined that the activities qualify
for a Class 1 (c} categorical exemption pursuant to Section 15301 [Existing Facilities] of the
State CEQA Guidelines because the proposal involves negligible or no expansion of an existing
City street use. Thus, no further environmental review is necessary.
RECOMMENDATION
Council adopt the Ordinance.
BOARDS/COMMISSION RECOMMENDATION
At the October 5, 2011 meeting of the Safety Commission, a motion was made to accept staff's
recommendation and approve the establishment of the 35 mph posted speed limit on Duncan
Ranch Road between Proctor Valley Road and Stone Gate Street. The motion carried by a vote
of 6 (in favor) - 0 (opposed) - 1 (absent).
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Page 2 of 4
DISCUSSION
Speed zones are established on the basis of an Engineering and Traffic Survey. The survey
includes an analysis of the current speed distribution of free-flowing vehicles along Duncan
Ranch Road between Proctor Valley Road and Stone Gate Street during periods w11en no
roadside or nearby development and/or construction was occurring.
City staff completed a speed survey along Duncan Ranch Road between Proctor Valley Road
and Stone Gate Street in accordance with the California Vehicle Code Sections 22357, 22358,
40802 and the Chula Vista Municipal Code Section 10.48.020, which indicates that the posting
of speed limits be determined by an Engineering and Traffic Survey at least once every seven
years. As described in the California Vehicle Code, the survey shall include:
(1) Prevailing speeds as determined by traffic engineering measurements;
(2) Accident records
(3) Traffic/roadside conditions not readily apparent to the driver.
These roadway characteristics are then used to help determine an appropriate speed limit. In
addition, the Manual on Uniform Traffic Control Devices (MUTCD, Traffic Operations Policy
Directive 09-04) states that the speed limit shall be established at the nearest 5 mph increment of
the 85th percentile speed. Also, if the Smph reduction is applied, the Engineering and Traffic
Survey shall document in writing the conditions and justification for the lower speed limit and be
approved by a registered Civil or Traffic Engineer.
Speed limits established on this basis conform to the consensus of those who drive the street as
to what speed is reasonable and safe, and are not dependent on the judgment of one or a few
individuals. Speed limits higher than the 85th percentile speed are not generally considered
reasonable and safe while speed limits below the 85th percentile typically do not facilitate the
orderly movement of traffic. Only when roadside development results in traffic conflicts or
unusual conditions not readily apparent to drivers may speed limits be further reduced.
Physical Conditions
Duncan Ranch Road between Proctor Valley Road and Stone Gate Street is 3,565 foot (0.68
miles) long and 40'-44' wide curb-to-curb. Parking is allowed on both sides along this segment
of Duncan Ranch Road, except for the eastside in front of Eastlake Middle School. There are no
bike lanes on Duncan Ranch Road.
The following table describes the existing conditions along Duncan Ranch Road:
Segment Limits Duncan Ranch Road Parkway between Proctor Valley Road and Stone
Gate Street
Len th/Width 3,565 feet (0.68 miles)/varies from 40' - 44' curb to cL~rb
Classification None
ADT (Year) 3,487 (2011)
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Exist. S eed Limit None -
85th% S eed 34 mph between Proctor Valley Road and Stone Gate Street
1 lane in each direction, two-way left turn lane in front of middle school
Number of Lanes and left turn lane pockets at intersections.
Centerline double yellow, left-turn pockets, crosswalks, stop legends,
Striping limit lines, and two-way left turn lane.
Parking and Bike Parking is allowed, except for the eastside in front of Eastlake Middle
Facilities School. There are no bike lanes.
Land Use Residential, Parlc, and middle school
A horizontal curve located approximately 1100' north of Stone Gate
Horizontal Alignment Street with a radius of 450' along the centerline produces a design speed
of 35 mph.
A crest vertical curve located approximately 60' south of Proctor Valley
Vertical Alignment Road with a 0.87% to -5.43% grade change over 200' produces a design
speed of 30 m h.
The accident rate at this segment is 0.39 (accidents per million vehicle
Accident Rate: miles} and is lower than. the rate of 1.49 for similar roadways in the State
Segment /State of California (2008).
Montevalle Park is located at the intersection of Duncan Ranch Road and
Special Conditions South Compass Dr. Eastlake Middle School is located at the intersection
of Duncan Ranch Road and Stone Gate Street.
CONCLUSION:
Based on the 85`I' percentile speed of the roadway, as well as other roadway characteristics
outlined in the Engineering/Traffic Survey, staff has determined that the 35 mph speed limit
should be established along Duncan Ranch Road. Also, the Commission recommended that staff
add warning signs at the crest vertical curve of .the road where the design speed is 30 mph.
However, after the field investigation and the review of the MUTCD requirements, staff has
determined that it is not appropriate and/or required to do so.
Should the City Council concur with the Safety Commission and establish the proposed 35 mpl~
speed limit, Schedule X of the register maintained in the office of the City Engineer would. be
revised to show the following:
10.48.020 Schedule X -Established Speed Limits in Certain Zones -Designated
Name of Street Beginning At Ending At Proposed Speed Limit
Duncan Ranch Road Proctor Valley Road Stone Gate Street 35 mph
DECISION MAKER CONFLICT
Staff has reviewed the property holdings of the City Council and has found no property holdings
within 500 feet of the boundaries of the property, which is the subject of this action.
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CURRENT YEAR FISCAL IMPACT
The segment has no posted speed limits. Two speed limit signs, two sets of speed limit legends,
and two 25 mph school speed limit for "WHEN CHILDREN ARE PRESENT" are required.
The cost to install these improvements is approximately $1500. The required work will be
funded by an existing Traffic Engineering Capital Improvement Project, TF-332, Signing and
Striping Program.
ONGOING FISCAL IMPACT
There will only be minor routine maintenance costs in 7 to 10 years. Eligible funding sources
include Transnet or Gas Tax.
ATTACHMENTS
1. Location Plat
2. Speed Survey
Prepared by: Murzci Cuthbert, Senior Civil Engi~ieer, Pa~bdic Works/Engineering Dept.
J:\Enaineer\AGENDA\CAS20] lU t-15-I 1\FINAL\Duncan Ranch traffic Speed\DUNCAN RANCH COUNCIL REPORTrev.doc
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SPEED LIMIT -ENGINEERING/TRAFFIC SURVEY
STREET: Duncan Ranch Road
LIMITS: Proctor Valley Road -Stone Gate Street
Length of Segment (ft): 3,565' (.68 miles)
Existing Posted Limit (mph): Not established
SUMMARY OF SPEED SURVEYS
Segment:
Date Taken:
No. of Vehicles on Sample (cars):
85`h Percentile (mph):
Range of Speeds Recorded (mph):
ROADWAY CHARACTERISTICS
Proctor Valley Rd -Stone Gate St
,ATTA~#~dI~NT ~''
9/ 14/2011
~0
34
24-40
Width (ft): 40 - 44' curb to curb.
Total No. of Lanes: 2 lanes (1 per direction) with a two way left-turn lane between South Compass Circle and
Stone Gate St.
Horizontal Alignment: A horizontal curve located approximately 1100' north of Stone Gate Street with a radius
of 450' along the centerline produces a design speed of 35 mph.
Vertical Alignment: A crest vertical curve located approximately 60' south of Proctor Valley Road with a
0.87% to -5.43% grade change over 200' produces a design speed of 30 mph.
TRAFFIC CHARACTERISTICS
Average Daily Traffic: 3,487 (2011)
On-Street Parking: Parking is allowed, except for the eastside in front of Eastlake Middle School.
Special Conditions: Montevalle Park is located at the intersection of Duncan Ranch Road and South Compass
Drive. Eastlake Middle School is located at the intersection of Duncan Ranch Road and
Stone Gate Street.
Accident History: The accident rate at this segment is 0.39 (accidents per million vehicle miles) which is lower
than the rate of 1.49 for similar roadways in the State of California (2008).
SURVEY RESULTS
Study was Prepared by: Ben Herrera
Date: 9/26/2011
Recommendation: Establish a 35 mph speed limit due to
the 85th percentile speed, roadway and
traffic conditions.
Date Recommendation Approved:
By: Muna Cuthbert, P.E.
Approved Speed Limit (mph): 35 mph
Per CVC 40802, Survey Expires: 9/14/2018
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CITY OF CHULA VISTA -VEHICLE SPEED SURVEY
SEGMENT UNDER STUDY Duncan Ranch Road (Proctor Valley Rd- Stone Gate St)
DATE :911412011 SURVEY SITE: In front of Montevalle Park POSTED SPEED: Not Estab.
T111AC oTnoT 7.1F D11A TIME END 3:04 PM WEATHER Sunny/Clear
MPH DIRECTION: NB = O SB = /
5 io is zo
TOTAL
%
CUM
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
O
1
1
50
39
38
37
36
35
O
0
\
0
0
\
1
2
5
3
2
5
3
49
47
42
34 O O O 8 8 39
33 0 0 0 0 1 1 1 \ 4 4 31
32 O O \ \ 6 6 27
31
30 O
0 O
0 \
0 1
0 \
1 \
1 \ \ \ 9
4 9
4 21
12
29 \ \ \ \ 4 4 8
28 O O \ 1 1 2 4
27 1 0 2
26
0
2
25
1
2
2
24 O
23
22
21
20
19
18
RECORDER: Ben Herrera
TOTAL NUMBER OF VEHICLES: 50
H:IHOMEIENGINEER(TRAFFIC\Speed_Surveys\Duncan Ranch Rd (RADAR).xls.xis
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ORDINANCE NO.
ORDINANCE OF THE CITY OF CHULA VISTA
ESTABLISHING A 35 MPH SPEED LIMIT. ON DUNCAN
RANCH ROAD BETWEEN PROCTOR VALLEY ROAD AND
STONE GATE STREET, AND AMENDING SCHEDULE X OF
THE REGISTER MAINTAINED IN THE OFFICE OF THE
CITY ENGINEER TO REFLECT THE ESTABLISHED SPEED
LIMIT
WHEREAS, City staff completed a speed survey along Duncan Ranch Road between
Proctor Valley Road and Stone Gate Street in accordance with the California Vehicle Code
Sections 22357, 22358, 40802 and the Chula Vista Municipal Code Section 10.48.020, which
indicates that the posting of speed limits be determined by an Engineering and Traffic Survey at
least once every seven years; and
WHEREAS, as described in the California Vehicle Code, the speed survey shall include
1) Prevailing speeds as determined by traffic engineering measurements; 2) Accident records;
and 3) Traffic/roadside conditions not readily apparent to the driver; and
WHEREAS, the Manual on Uniform Traffic Control Devices (MUTCD, Traffic
Operations Policy Directive 09-04) states that the speed limit shall be established at the nearest
Smph increment of the 85th percentile speed. Also, if the Smph reduction is applied, the
Engineering and Traffic Survey shall document in writing the conditions and justification for the
lower speed limit and be approved by a registered Civil or Traffic Engineer; and
WHEREAS, based on the 85th percentile speed of the roadway, as well as other roadway
characteristics outlined in the Engineering/Traffic Survey, staff has determined that the speed
limit on Duncan Ranch Road between Proctor Valley Road and Stone Gate Street should be 35
mph; and
WHEREAS, on October 5, 2011, the City of Chula Vista Safety Commission concurred
with staff s recommendation that the speed limit on Duncan Ranch Road between Proctor Valley
Road and Stone Gate Street should be 35 mph; and
WHEREAS, this recommendation and other information in the City Engineer's report has
been fully considered by the City Council.
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Ordinance No.
Page 2
NOW, THEREFORE, the City Council of the City of Chula Vista does hereby ordain as
follows:
I. ESTABLISH SPEED LIMIT
That the speed limit on Duncan Ranch Road between Proctor Valley Road and Stone Gate Street
be established at 35 mph and Schedule X of the register maintained in the office of the City
Engineer be revised to show the following:
10.48.020 Schedule X -Established Speed Limits in Certain Zones -Designated
Name of Street Beginning At Ending At Proposed Speed Limit
Duncan Ranch Road Proctor Valley Road Stone Gate Street 35 mph
II. EFFECTIVE DATE
This ordinance shall take effect and be in full force on the thirtieth day from and after its
final adoption.
Presented by
Richard A. Hopkins
Director of Public Works
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