Places with car roads turned into bike roads What can we do to minimize car usage and petroleum and other car energy consumption? I was thinking designating some car lanes as bike-only lanes could work in some places, or even having an hour where only bike traffic is agreed or something like that.

Bikes could have special carts attached to them for transporting whatever messed to be transported during those hours, and some special vehicles would be nevertheless authorized.

How would this work? Where has a similar system been implemented, and what are the details?
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.