9| 07 | 2006 | MADISON, WISCONSIN 14 TH INTERNATIONAL CONFERENCE ON WALKING AND BICYCLING BIKE LANES AND CAR DOORS DETAILS FOR DESIGNERS

OUTLINE SAN FRANCISCO – BACKGROUND AND BICYCLE NETWORK BICYCLE LANES – WHY AND HOW? STUDY #1 – PARKING LANE WIDTHS STUDY #2 – PARKING T MARKINGS RECOMMENDATIONS

Area: 47 Square Miles Population: 780,000 (2 nd Densest City in U.S.) Terrain: Hills! (31.5% Steepest) Percent Bicycle to Work: 2.08%* Recent Poll: 5% of SF residents Use Bike as primary mode of transportation * 2000 Census (#1 in US cities w/ >500,000, 108% increase from 1990 Census) SAN FRANCISCO

205 TOTAL MILES 30 Miles of Bike Paths 45 Miles of Bike Lanes 130 Miles of Shared Roadways -55 Miles of Wide Curb Lanes -80 Miles of Narrow Curb Lanes BICYCLE NETWORK

SHARED ROADWAY MARKING

San Francisco Bicycle Coalition's 2006 Survey What would make San Francisco a better city for bicycling? BICYCLE LANES #1 Response: More bike lanes (21%) 90% of respondents prefer to ride on streets with bike lanes rather than streets without (6% no opinion)

Bay Area Trends 657 vehicles per 1000 persons in vehicles per 1000 persons in 2020 (Projected by Metropolitan Transportation Commission) San Francisco 480,000 Registered Vehicles 320,000 estimated on-street parking spaces High demand for on-street parking CARS ARENT GOING AWAY* *YET

AASHTO GUIDE FOR THE DEVELOPMENT OF BICYCLE FACILITIES MUTCD 2003 CALIFORNIA SUPPLEMENT CALIFORNIA HIGHWAY DESIGN MANUAL BICYCLE LANE DESIGN Bike lanes adjacent to parking must be a minimum of 5 wide No minimum parking lane width

From AASHTO Guide for the Development of Bicycle Facilities 40 in (1.0m) 30 in (0.75m) BICYCLIST OPERATING SPACE

CVC No person shall open the door of a vehicle on the side available to moving traffic unless it is reasonably safe to do so and can be done without interfering with the movement of such traffic, nor shall any person leave a door open upon the side of a vehicle available to moving traffic for a period of time longer than necessary to load or unload passengers. CVC & ON-STREET PARKING

The Door is Always Open Courtesy of Department of Public Art San Francisco Bicycle Injury Collisions 133 From Doorings (~8%) DOORING COLLISIONS

50% in Door Zone 30% in Door Zone10% in Door Zone Red dashed line = 9.5 from curb (85 percentile opened car doors)

PARKING LANE WIDTH STUDY Will wider parking lanes encourage motorists to park further away from the curb? This second line will encourage parking closer to the curb, providing added separation from motor vehicles… Page 23, AASHTO Guide for the Development of Bicycle Facilities

STUDY LOCATION 11 Locations ~600 Observations

OTHER DESIGN FACTORS Context is Key! Wider Parking Lanes May Be Needed For: Downhill Bike Lanes Commercial Areas with High Parking Turnover Areas Where Trucks Frequently Park to Load/Unload

PARKING T STUDY

Before - Parking Ts Extend to 9After - Parking Ts Extend to 11

Before – Average PositionAfter – Average Position

BEFORE Mean = % > % > 10 24% IN DOOR ZONE AFTER Mean = % > % > 10 10% IN DOOR ZONE

RECOMMENDATIONS Where space permits, wider parking lanes should be provided next to bike lanes to give cyclists more buffer from opening car doors Bike lane/parking lane design should take into account factors such as parking turnover, expected vehicle types, street grade Extended parking Ts show potential for encouraging cyclists to ride outside the door zone Design standards should be revisited, and should address door zone issue - Need for research with narrower bike lanes and other innovative treatments

50% in Door Zone 30% in Door Zone10% in Door Zone Red dashed line = 9.5 from curb (85 percentile opened car doors)

38% in Door Zone 13% in Door Zone0% in Door Zone

EDUCATION OF CYCLISTS

EDUCATION OF MOTORISTS

Dustin White SF Municipal Transportation Agency (415) San Francisco Bicycle Program