As Marcia Kramer informed CBS2 viewers last night, construction has begun on the extension of the First and Second Avenue bike lanes from 34th Street to 57th Street. The section of First Avenue from 34th Street to 47th Street is the only part of this project where the bike lane will be physically protected from traffic. Above 47th it becomes a plain painted bike lane and then transitions into a shared lane from 49th Street to 57th Street. So far, the lane only consists of paint — construction hasn’t started on any pedestrian islands — but some cyclists are already making use of the protected space.

More pics below the fold.