Evaluation of Bus Bulbs

摘要

A bus bulb, also known as a nub, curb extension, or bus bulge, is a section ofsidewalk that extends from the curb of a parking lane to the edge of a through lane. In regard to traffic operations, bus bulbs operate similarly to curbside bus stops. Buses stop in the traffic lane instead of weaving into a parking-lane curbside stop. The objectives of this research project were to: Determine the effect of the installation of bus bulbs on transit operations, vehicular traffic, and nearby pedestrian movements at selected sites in San Francisco; Collect information on when bus bulbs should be considered and lessons learned from those cities that use the bus bulb configuration; Identify vehicle and bus operations for bus bulbs located nearside and farside and along a corridor, using computer simulation; and Evaluate conditions in which the installation and use of bus bulbs is advisable, based on the findings from the above efforts.