Philadelphia's first protected bike lane — meaning there's an obstacle between vehicle traffic and the bike lane itself — was implemented in 2016 on Ryan Avenue in Mayfair. While there are more than 200 miles of bike lanes on Philadelphia streets, only about 2.5 miles are protected. Among the most high-profile of those is on Chestnut Street in West Philadelphia between 34th and 45th Streets, and those lanes have irked some community members due to the lost traffic lane.