The Hairball Intersection Improvement Project is an effort to make key portions of the Hairball paths safer and easier to use for pedestrians and bicyclists. The project builds on previous planning efforts including the Cesar Chavez East Design Plan and aims to support citywide efforts such as WalkFirst, Vision Zero, and the SFMTA 2012 Bicycle Strategy to improve non-motorized safety and mobility in San Francisco.
In an area known as “The Hairball”, Cesar Chavez Street, Bayshore Boulevard and Potrero Avenue change from city streets to a complex arrangement of bridges and ramps linking with Highway 101. The intersection is built in three levels, with pedestrian and bicycle circulation generally restricted to the middle and ground levels and motor vehicles operating on all three levels. Because many paths intersect in this area, the interchange is challenging to navigate and there are points of conflict between vehicles, pedestrians and bicycles. However, the pedestrian and bicycle network has connections that are not possible by vehicle, providing a high level of connectivity for non-motorized users within the complex intersection.