SUPPORTS ITEM NO. 1
T&T COMMITTEE AGENDA
MAY 14, 1997
ADMINISTRATIVE REPORT
Date: 30 April 1997
Dept. File No.
CC File: 5761-1
TO: Standing Committee on Transportation and Traffic
FROM: General Manager of Engineering Services
SUBJECT: Supplemental Report to the Traffic Plan for Burrard and
Cypress
CONSIDERATION
K. THAT the work on Burrard from 1st to 3rd be done with minimum
(3.7m) curb-lane width, to reduce pavement width, and property
and construction costs by $170,000.
GENERAL MANAGER'S COMMENTS
The General Manager of Engineering services submits K for
CONSIDERATION.
PURPOSE
To offer an alternative design on Burrard Street between 1st and 3rd
Avenue which will reduce property and construction costs, and pavement
width by reducing curb-lane widths.
DISCUSSION
This update is supplementary to the report of March 27, 1997 on design
modifications to Burrard Street. In that report, the design proposed
includes bicycle lanes north of 1st Avenue, and wide 4.0m curb lanes
from 1st Avenue to 3rd Avenue.
At the April 9, 1997 Standing Committee meeting, a number of delegations
from the Cycling Community were heard, and they indicated that the wide
lanes on Burrard were not an important part of the plan. The trade-off
discussed was that with the wider curb lanes, vehicles can more easily
pass bicycles, but the speeds are higher. Furthermore, wider pavement
means greater crossing distances for pedestrians, and higher property
costs.
The curb-lane width needed to provide space for trucks and buses in the
absence of bicycles is 3.4m (11 ft.) Motor vehicles would need to slow
down and follow bicycles or change lanes to go around bicycles. If this
curb-lane width was to be used, it could reduce project costs by
approximately $365,000. However, this could bring vehicles very close
to cyclists and is not recommended. The minimum width needed for
vehicles to pass bicycles within a lane is 3.7m (12 ft.), which is the
current curb-lane width on Burrard. The initial design (geometric YD
632, Recommendation A) provides for wider, 4.0m (13 ft.) curb lanes,
which exceed the minimum needed for vehicles to pass bicycles. This
width would provide a more comfortable space for cyclists.
It has been Engineering's position, as expressed in the Comprehensive
Bike Plan and the March 27 report, that safety is increased by providing
more space for bicycles to integrate on busy arterial streets. However,
there are alternative views and some bicycle groups are advocating
reduced pavement widths to reduce vehicle speeds.
If the curb-lane widths were set at 3.7m instead of 4.0m, significant
cost reductions would be realized, particularly due to reduced property
costs. The cost reductions are as follows:
Reduced Property Reduced Construction
Costs Costs Total
1st to 3rd $165,000 $5,000 $170,000
(3.7 m curb lane)
Therefore, the project cost could be reduced from $1,900,000 to
$1,730,000 (a 9% decrease).
The proposal outlined in this supplementary report would still include
the bicycle improvements on Cornwall at Burrard, the left-turn bays
along Burrard, and the bicycle lanes on Burrard from Cornwall to 1st
Avenue. The bicycle lanes would connect Burrard Bridge to 1st Avenue
and the Cypress Bikeway, and then Cypress could be used as an
alternative to Burrard Street south of 1st Avenue. Cyclists would be
encouraged through signage and pavement marking to take the
Burrard/1st/Cypress routing. Experienced cyclists would likely continue
to choose Burrard Street to travel south of 1st Avenue, which would be
accommodated by the proposed 3.7m curb-lane widths.
CONCLUSION
At the April 9, 1997 Standing Committee meeting, the bicycle community
recommended minimizing the pavement width on Burrard Street, in lieu of
wider curb lanes. To reduce the pavement width and property costs, the
proposed work could be done with 3.7m curb lanes from 1st to 3rd Avenue.
Cyclists would then be encouraged to use the Cypress Bikeway south of
1st instead of Burrard. By reducing the curb lanes as suggested, the
project cost would be reduced by $170,000 (9%). This option is provided
for CONSIDERATION.
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