3 - North Washinton Avenue Discussion

Home Browse Search

3113113 Curb EAensions(Bulb-outs)I SF Better Streets 2 t t is son rer service 24x7 Customer Service PROCESS OVERVIEW C-b-i—f o..c p,""A...blendghhahaod Center spare fo-ommu.i1y gathering and socializing. Curb extensions may be installed as part of a traffic calming project or other public or private initiative. For curb extensions as part of a traff ic calming project,see Traffic Calming Overview Off idal sidewalk curb lines are established by Board of Supervisors Ordinance#1061,"Regulating the Width of Sidewalks." Bulb-outs or sidewalk widening on one block or less can be administratively approved by DPW,with input from other agencies.Projects involving bulb-outs or sidewalk widening on more than one block require legislative approval by the Board of Supervisors. Traffic calming devices require approval by an SFMTA hearing officer.Additionally,If the project would result in a change to certain parking or traffic designations,it may require approval by the SFMTA Board. See Permit Process OFFICIAL CODES$DOCUMENTS Better Streets Plan(street design guidelines) SFMTA Traffic Calming Guidelines t=' DPW Standard Pan for Curb Bulb DESIGN GUIDELINES Placement Street Types:All Sidewalk zones:Extension zone Specific priority areas for curb extensions include: • New streets • Streets with high pedestrian volumes and/or high traffic volumes and speeds • Wide streets with long crossing times • Streets with a history of pedestrian safety concerns • Locations where neighborhood streets intersect with busier throughways • Transit pr'ior'ity streets where shortening crossing cycles would improve transit flow Lower priority areas for curb extensions include streets with lower pedestrian and traffic volumes and lower speeds,such as neighborhood residential streets and alleys.However,they may be considered on these street types as well. Curb extensions should not be used on streets without a parking lane,or that have a peak period tow-away parking lane. Curb extensions may be placed at transit stops per transit stop guidelines.Where curb extensions are provided at transit stops,they should be a full-length transit bulb,and not a standard corner bulb,as It can be difficult for a bus to exit or re-enter traffic around a corner bulb-out. Guidelines Bulb-outs should be designed to maximize pedestrian space and minimize crossing distances as much as feasible,while allowing vehicle movements as described in the curb radius guidelines. Width and length Bulb-out width should be maximized based on space for adjacent vehicle and bicycle travel lanes(see Figure 1).The bulb-out should extend to the full width of the parking lane or leave: www.sfbetterstreets.org/find-project-types/pedestrian-safety-avid-traffic-calmi rig/traffic-calmi rig-overvievJcurb-extensions/ 2/5