GOOD Magazine did a take on what a more "livable" street in Manhattan would look like. Unfortunately it isn't carfree, but it's worth checking out.
My favorite recommendation is the traffic light with LPI, "leading pedestrian interval," tip #7 on GOOD's graphic. My least favorite recommendation is #8, the bollard. Sidewalks in Amsterdam are an example of how bollards can be overused and obstruct pedestrians. What do you think?
(Thanks, Erica C. Barnett from The Stranger's Slog Blog for the link.)