We’ve all heard about bike boulevards, but bike freeways? That’s what bike infrastructure opponents in San Francisco are calling the latest proposal to install bike lanes on Polk Street. Specifically, proponents are fighting for the removal of curbside parking and replacing it with bike lanes and parklets. Proponents also cite the high number of bike crashes along the street, obviating the need for safety improvements. Opponents fear that removing parking would jeopardize businesses along the street.