Minneapolis, MN is one of the exceptions. The city has invested in good bike lanes and as a result, people do bike in big numbers. Some folks bike year round, even when the temperature is well below freezing.

The city benefited greatly from some disused rail right-of-ways and turned them into completely separated bike highways. Many of the on-street bikeways that have been set up use plastic divider posts to signal to drivers separation. It's much cheaper than building grade-seperated lanes, but gives a real sense of protection to the bikers.