New bike lane on 21st Street

There's a new bike lane on 21st Street.  I'm very pleased that I live at the intersection of northbound and westbound bike lanes!  If you look at the map of Manhattan bike lanes, you'll also see that it includes an eastbound bike lane on 20th Street.  (Transportation Alternatives has a bunch of maps of interest to bikers.)

This is what I saw Friday morning, looking west on 21st Street.

By Saturday morning, it looked like this.

And it crosses 8th Avenue.