Protected Bike Lanes in San Francisco · PDF fileSF State of Cycling Report identified top ......
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Transcript of Protected Bike Lanes in San Francisco · PDF fileSF State of Cycling Report identified top ......
![Page 1: Protected Bike Lanes in San Francisco · PDF fileSF State of Cycling Report identified top ... Reduce encroachment by cars and trucks onto the bike ... Laguna Honda Boulevard](https://reader033.fdocuments.us/reader033/viewer/2022051721/5a7977037f8b9ab45c8bb0a2/html5/thumbnails/1.jpg)
Protected Bike Lanes in
San Francisco Mike Sallaberry SFMTA
10 | 14 | 2011
NACTO Workshop - Chicago IL
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San Francisco
• 2nd Highest Density in the
U.S.
• 47 square miles
• Mild Climate
• Population ~810,000
• Hilly (steepest hill 31.5%)
Bikeways to be Discussed
Masonic Avenue – designed
Market Street – constructed
Masonic
Market
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Bicycle Traffic
Signal at
Fell/Masonic
SF State of Cycling Report identified top three barriers to more cycling
• Need for more
bike lanes
• Fear of cars
• Fear of crossing
major streets
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Masonic Avenue Existing Roadway Design
• 100-foot wide right-of-way including sidewalks
• Sidewalk width ranges from nine to 22 feet
• Typically two traffic lanes in each direction off-peak
• Additional tow-away lane added in peak direction AM
and PM
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North – South Streets
Masonic Avenue Topography & Street Network
Masonic Ave is the only through street
running North/South between Park
Presidio and Divisadero Streets.
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Bicycles
• Masonic Avenue is a
designated city bicycle route
• Only north-south through
route for ½ mile in either
direction
• No dedicated space
• High traffic volumes and
speeds
• Steep grades
• Some sidewalk riding
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Northbound at Fulton Southbound at Fulton
Traffic Volumes
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Transit and Delay
Cross Street
Signal Delay (sec)
PM Peak, southbound
Existing
(3 Lanes
in peak direction)
Proposed
(2 Lanes)
Geary 29 53
Anza/O'Farrell 9 9
Turk 5 15
Golden Gate 4 5
Fulton 13 17
Grove 2 3
Hayes 4 9
Fell 35 31
Oak 10 12
Total Delay 111 154
Additional Delay 44
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Existing Parking Usage Characteristics
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Street Redesign Proposal
Developed through Community Process
Series of three community
meetings:
•Workshop 1: Small-group exercise to
design ideal street
•Workshop 2: Presented four conceptual
options for participant feedback
•Workshop 3: Presented two refined
proposals, “Boulevard” and “Gateway”
Workshops attended by more than
100 community members
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Workshop Survey:
Boulevard Preferred
61% of respondents
live within one block
of Masonic Ave
109 survey responses
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The Boulevard Design Chosen by Community
No parking, 4 lanes, cycle track, median
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The Boulevard Plan View Rendering (Masonic Ave at Fulton St)
Masonic Avenue
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Bus Bulb Plaza - Conceptual Illustration
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Traffic Impacts
Cross Street
Signal Delay (sec)
PM Peak, southbound
Existing
(3 Lanes
in peak direction)
Proposed
(2 Lanes)
Geary 29 53
Anza/O'Farrell 9 9
Turk 5 15
Golden Gate 4 5
Fulton 13 17
Grove 2 3
Hayes 4 9
Fell 35 31
Oak 10 12
Total Delay 111 154
Additional Delay 44
• Traffic model shows that
traffic volume can be
accommodated in two
lanes without tow-away
lane
• Moderate increase of
about an additional
minute of signal delay
due to tow-away lane
removal
• Stopped buses would
block traffic lane at all
times
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Transit Impacts
• Removing peak-hour tow-away lane adds less than one minute of travel time for transit 4-6 PM southbound
• Improved transit safety by removing conflicts with parking maneuvers
• Bus bulbs reduce delay associated with merging in and out of bus zones
• Optimized placement of stops to minimize delay
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• Parking removed from both sides at all times
(about 165 spaces total)
• Converting parallel parking to angled parking on
Turk between Baker and Central would create 20
additional spaces
• Potential to add additional angled parking on Turk
west of Masonic
• Concerns: Target overflow, loading and deliveries
Parking Impacts
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Masonic Avenue Complete Street and Raised Cycletracks
Key Challenge: Cost $20 Million to Construct
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Market Street
Separated bikeway, diversion of traffic, color
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Market Street
Purpose: Reduce encroachment by cars and trucks onto the bike
lane and sidewalk, to increase the feeling of safety for cyclists.
Results: Vehicles traveling in the bikeway reduced by 96%.
Double parking (in the bikeway or travel lane) reduced by 65%.
“Safe hit”posts and
green paint added to
buffered bike lane.
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Market Street
44% increase in cyclists on
Market from 2009-2011.
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Market Street “Super Sharrows” or “Green-Backed Sharrows”
Preliminary Findings: Cyclists changed their merging pattern,
but no increase in looking over shoulders or using hand signals.
No change in motorists behavior.
Purpose: Guide
cyclists through a
merge and to alert
motorists to the
presence of
cyclists. Also to
maintain branding
of colored bikeway.
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• Higher Visibility
• Marketing/Branding
• However, cost is 5x to 10x cost of regular bike lane/marking
Colored Bicycle Facilities
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Other Separated Bikeways/Cycletracks
Laguna Honda Boulevard
Division Street Alemany Boulevard
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JFK Drive in Golden Gate Park Proposed Design
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How to Create Space via Road Diets
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27
Designing for Peak Motor Vehicle Flow
veh
icle
s p
er
ho
ur
Level of Service “F”
Peak
Peri
od
Unused Capacity
Unused
Capacity
# of vehicles per hour
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Road Diets in SF
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• Signals timing set to 13 mph progression at
11 intersections
• One of SF’s highest-use bicycle corridors (700
cyclists during 1.5 hour count – up from 220)
• Parallel corridors ideal for transit (Mission)
and automobile traffic (Guerrero)
• SF’s complex grid and topography limit where
green waves can be implemented
Other Treatments:
Valencia Green Wave
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Wider Bike Lanes
Buffered Bike Lane Alemany Boulevard
Wider Bike + Parking Lane Scott Street
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Pavement to Parks - “Parklets”
A result of improved inter-agency coordination
Car parking spaces converted to ped/bike uses
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32
On-Street Bike Parking/Corrals
1 car space
=
10 to 12
bike
spaces
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Space is a Limited Resource Use it Wisely and Efficiently
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Changes in Mode Share in SF
Source: US Census American
Community Survey
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Key Goal Positive Feedback Loop
MORE PEOPLE RIDING
More demand (for bicycle accommodation)
More
accommodation
More awareness
of cyclists More safety
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Q/A…
Thank you!