Cyclists who routinely ride on Market Street from Gough Street eastbound have no doubt noticed a steady stream of changes to the bicycle lanes as the San Francisco Municipal Transportation Agency (SFMTA) has been adding safe-hit posts and creating the impression of greater safety and dignity for cyclists on the corridor. Over the weekend the SFMTA took that process a few giant leaps forward by adding vibrant green paint to the protected lanes to further distinguish the bicycle-only space. The lanes are part of the SFMTA's Sustainable Streets division, which has secured permission from Caltrans and the Federal Highway Administration (FHWA) to experiment with various pavement colors and treatments in bicycle lanes, the Market Street Calm the Safety Zones, and other areas of the city.