In May, the state of Colorado passed a law that allows communities to have the "Idaho Stop" or "rolling stop" that allows cyclist to treat a stop sign as a yield sign and red lights as stop signs.
The "Idaho Stop" started in Idaho in 1982. It was then adopted in Delaware and, as of May, Colorado is allowing cities to adopt the law.
The new law also sets a maximum rolling-stop speed of between 10-20 miles per hour. It was written with the intent of providing consistency to local governments in Colorado that already have the bike-specific laws: Aspen, Summit County, Dillon and Breckenridge.
Just for funsies, here's a guy doing something called a rolling stoppie on a bike.