Writing for Wired, Mark Harris brings us up to date on the green, yellow, and orange dockless shared bikes that Seattle-area residents and visitors can’t help noticing and sometimes tripping over. From the Pronto bikeshare failure to the current LimeBike, Ofo, and Spin companies, Mark delves into the history of shared bikes and gets perspectives from proponents and critics of the system. @meharris, meharris.com