The guerrilla bike lanes and sharrows (shared lanes) cropping up in major cities range from the clearly illicit (brightly colored spray painted arrows and bike symbols) to studiously official (exact
copies of the stencils cities use). Tired of waiting for cities to act, bike activists risk arrest by painting unauthorized lanes. But they have seen rewards: In several cases, illicit lanes have been made permanent. As one LA council member describes the lanes, “It’s the DIY project that roared.”
This is part of a movement called spontaneous interventions.