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3/13/13 Curb F)densions(Bulb-outs) SF Better Streets <br /> RJ�i.L�i ar a� Search �o <br /> A guide to making street <br /> improvements in San Francisco ¢ <br /> y � <br /> ~ A <br /> iI <br /> as � <br /> 1 <br /> B <br /> WHY BETTER STREET LEARN THE PROCESS FIND PROJECT TYPES DESIGN GUIDELINES <br /> Orb Mdmsiou — (Bulb—outs) FIND PROJECT TYPES <br /> D iT�i(7` Activating Street Space <br /> See also Traffic Calming Overview <br /> On this page: Greening&Stormwater <br /> Curb extensions(also called bulb-outs)extend the sidewalk into the Management <br /> P Process Overview <br /> parking lane to narrow the roadway and provide additional pedestrian <br /> space at key locations;they can be used at corners and at mid-block. o Official Codes&Documents Pedestrian Safety& <br /> Curb extensions enhance pedestrian safety by increasing pedestrian t- Design Guidelines Traffic Calming <br /> visibility,shortening crossing distances,slowing turning vehicles,and P Maintenance Reclaiming Roadway <br /> visually narrowing the roadway. Space <br /> Generally,these benefits are greater the further the bulb-out extends Other Streetscape <br /> into the roadway and the tighter the turn radius created by the bulb-out, Agency who Can help Elements <br /> but should be balanced against roadway characteristics and the needs <br /> of large vehicles to navigate turns. M TA <br /> Curb extensions can often be lengthened to create public spaces, Buflftg <br /> San Francisco Municipal Nei hborhood <br /> landscaped areas,or transit waiting areas.They can also be employed Transportation Agency 9 <br /> as neck-downs or chokers,traffic calming techniques that reduce Livable Streets Division support <br /> 1 South Van Ness Avenue,7th Floor <br /> vehicle travel lanes. San Francisco,CA 94103 <br /> Work with your <br /> Curb extensions can have the following benefits: <br /> neighbors to <br /> make street <br /> improvements ` <br /> • Increased pedestrian visibility at intersections through improved happen. <br /> sight lines Read more.. <br /> • Decreased pedestrian exposure to vehicles by shortening the & '' <br /> crossing distance <br /> • Reduced vehicle turn speeds by physically and visually narrowing .a t� Merchont�s <br /> the roadway Corner <br /> • Increased pedestrian waiting space <br /> • Additional space for street furnishings,plantings and other Local businesses <br /> have a strong <br /> amenities stake in well <br /> • Reduced illegal parking at corners crosswalks and bus stops cared-for streets. <br /> • Facilitated ability to provide two curb ramps per corner Read more <br /> 1F r. <br /> Although curb extensions have many benefits,they may not be f"` F <br /> appropriate in all circumstances.Use of curb extensions should Developer <br /> consider the following: Developer <br /> VCi <br /> Requirements <br /> • They may be more expensive to construct than other measures t I. <br /> Private <br /> • They can reduce flexibility of the roadway in construction routing development is a <br /> • They can reduce future flexibility in making changes to the location significant <br /> of bus zones,roadway lane layout,or crosswalks contributor of street <br /> improvements. ITT <br /> Read more... <br /> `.. Bulb-outs should also be considered as one among many strategies to <br /> enhance pedestrian safety and streetscape character;in some cases, 4 � <br /> median refuges,raised crossings,other improvements,or a <br /> combination of strategies may be more appropriate. "�'�' 7 Need Help?Go to 311 <br /> v,mw.sfbetterstreets.org/fi nd-project-types/pedestrian}safety-and traffic-calmirig/traffi c-Cal mi rig-o\,eruevicur b-extensions/ 1/5 <br />