HomeMy WebLinkAbout1989-06-05; Traffic Safety Commission; ; Establish a rural road standard for Adams Street between the designated limitsf
J CITY OF CARL5BAD
TRAFFIC SAFETY COMMISSION
COMMISSION REPORT OF: June 5, 1989 ITEM NO.__M_
LOCATION: Adams Street -Harrison Street to Park Drive
INITIATED BY: City Council
REQUESTED ACTION: Establish a rural road standard for Adams Street between the
designated limits.
BACKGROUND:
DATA:
This item was discussed at the May 1, 1989 meeting of the Traffic Safety Commission. The
motion by the Commission to recommended Alternative D as the Rural Road Standard was
deadlocked in a 2-2 tie vote. As a result, the Commission requested that this item be
continued one month. In addition, the Traffic Safety Commission requested that one
additional alternative be analyzed by staff and presented at the June meeting.
The five alternatives discussed at the May TSC meeting have been supplemented with one
additional alternate design concept. This concept is discussed in the attached memorandum
from the City Engineer. At the request of the Commission, this alternative, identified as
ALTERNATIVE F, analyzes the concept of removing the dedicated bicycle lane from Adams
Street and constructing the bicycle lane on the edge of the Agua Hedionda Lagoon. This
alternate deletes sidewalk on one side of the roadway with sidewalk remaining only on the
"view" side of Adams Street.
The memorandum from the City Engineer finds that there are advantages to Alternative F.
However, the advantages are at the expense of optimum pedestrian and bicycle design. As
a result, there is a reduction in optimum safety benefits that would be achieved from dedicated
bicycle lanes and sidewalks on both sides of the roadway. For that reason, the City Engineer
and the Traffic Safety Coordinating Committee continue to recommend Alternative D.
RECOMMENDATION:
The Traffic Safety Coordinating Committee recommends that Alternative D be implemented
as the rural road standard for Adams Street from Harrison Street to Park Drive.
NECESSARY CITY COUNCIL ACTION:
The City Council will need to consider adopting a rural road standard after a public hearing
is held by the Planning Commission.
May 17, 1989
TO: TRAFFIC SAFETY COORDINATING COMMITTEE
FROM: CITY ENGINEER
ADAMS STREET DESIGN STANDARD, HARRISON STREET
TO PARK DRIVE
At its meeting of May 1, 1989, the Traffic Safety Commission considered a
staff and Traffic Safety Coordinating Committee recommendation to establish
a special standard for Adams Street between Harrison Street and Park Drive.
The recommended section, Alternative D, would widen the existing substandard
roadway to provide a 34 foot curb-to-curb street section with 5. foot sidewalks
on both sides, full right-of-way width being 55 feet with a 47 foot graded
section. This section would provide two 12 foot travel lanes, 5 foot bike
lanes and pedestrian movements in both directions.
At the Commission meeting, testimony was received, but no consensus was
reached on a recommended alternative. The Commission chose to continue the
item for one month and requested staff to develop a new alternative removing
sidewalk from the northeasterly side of the road and eliminating a dedicated
bike lane along Adams Street. The dedicated bike lane was assumed to be
provided along the Lagoon frontage, between Hoover Street and Cove Drive,
in conformance with the Bike Route Plan contained in the Agua Hedionda LCP
( see attached Exhibit 1).
In response to Commission direction, Alternative F has been developed. This
alternative shown in the attached section provides sidewalk on the Lagoon side
of the street and reduces the roadway width to 28 feet curb-to-curb. Overall
right-of-way would remain at 55 feet, but the graded section would be reduced
by 6 feet, from 44 feet to 38 feet. This reduction would significantly reduce
the grading impacts of the proposed improvements.
Analysis of Alternative F
Alternative would significantly reduce grading impacts through elimination of
sidewalks on one side and total elimination of a dedicated bike lane along the
Adams Street scenic corridor route.
Provision of sidewalk on one side will force pedestrians fronting Adams Street
or coming from the east to make random crossings to reach the constructed
sidewalk. This situation is not uncommon, but will not provide for optimum
pedestrian safety and is at variance with generally accepted City practice.
The Agua Hedionda LCP ( see Exhibit 1 Bike Route Plan) establishes the pri-
mary bike route along the Lagoon from Hoover Street to Cove Drive proceeding
northeasterly to Park Drive. Adams Street is designated as a secondary route .
To : Traffic Safety Coordinating Committee
May 17, 1989
Page 2
The Lagoon trai I is designated as a 10 foot easement to be developed as a
combined pedestrian /bike trail. Staff has obtained several easements along
this route, but several remain to complete the link. Funding for construction
has not yet been identified, and construction will not likely occur for a number
of years. Until completed, bicycle access will be exclusively along Adams
Street.
Even after the Lagoon trail is complete, Adams Street as a scenic corridor
will provide the most direct and attractive bike access route. It is likely
that Adams Street will remain the dominant travel route.
Recommendation:
In reviewing Alternative F, staff finds that the option is viable and would
reduce costs and grading impact at the expense of an optimum pedestrian and
bicycle design.
Staff retains its previous recommendation of Alternative D.
LBH /pmj
Att.
cc : Traffic Engineer
Senior Management Analyst
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EXHIBIT I
BIKE ROUTE
PLAN
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AGUA HEDIONDA LCP
TRAFFIC SAFETY
BICYCLE SAFETY
PEDESTRIAN SAFETY
MAINTAINABILITY
PARKING
DRAINAGE CONTROL
30 '
3 '
14'
MODERATE
MODERATE
MODERATE
GOOD
CENTERLINE
14'
ADAMS ST.
25 '
5'
SIDE
WALK
2'
MIN
NOT ALLOWED -POOR FOR EMERGENCIES
GOOD
ALTERNATIVE F
PROPERTY LINE
TRAFFIC SAFETY
BICYCLE SAFETY
PEDESTRIAN SAFETY
MAINTAINABILITY
PARKING
DRAINAGE CONTROL
CENTERLINE OF RIGHT OF WAY-.
3 o'
CENTERLINE OF ROAD-. 5'
s' 17 I 17'
• 1 12' 4 12' -1~ ~
WALK BIKE TRAFFIC LANE TRAFFIC LANE BIKE
LANE LANE
0-WIDEN STREET TO 34 FEET
251
I • 5 •
SIDE
WALK
3'
-+-PROPERTY LINE
,-1---FILL SLOPE
AND/OR RETAINING
WALL GOOD
GOOD
GOOD
STRIPE FOR BIKE LANE.ADD CONCRETE CURB & GUTTER
ADD CONCRETE SIDEWALK (ONE SIDE)
GOOD ( MAY COLOR CONCRETE BLACK TO REDUCE VISUAL IMPACT)
NOT ALLOWED MAY BE ALLOWED AT SPECIFIED LOCATIONS WITH ADDITION
GOOD OF PARKING BAYS
ALTERNATIVE D