Places with car roads turned into bike roads
In my city, they shut down the parkway and the roads in the provincial park on Sunday mornings during the summer for bicycle traffic only. Its a great way to get people out on their bikes when they aren't comfortable in traffic. It also helps relieve congestion on the shared bike/walk paths that would be just swarmed with riders in these areas if they didn't close the roads. The roads aren't really that busy outside of weekday rush hour traffic anyway.