Here in CO they passed the "lane splitting at stoplights" law for bikers last year.
Stupid is as stupid does: within 1 week bikers were in hospitals here because they didn't do it safely, or because (one of them that made newstime stardom) of some local 'tudes: one flipped off the cars that were waiting at the light and then rocketed out at the light, just in time to catch a redlight-stretcher from the right. There is an epidemic here of attention-deficit-disorderly types playing with their phones at the lights that can wait all the way through the next green, making lots of others mad: bikers especially, it seems. I know I don't appreciate heating up my engine just because the empty-head in front of me isn't paying attention to the traffic light
A word of caution when riding in CO cities nowadays: we've had a massive influx of Californians, many with their bikes, who don't know the psyche of Colorado drivers. This has created a mix of greenlight-jumpers with our longtime redlight-stretcher crowd, with predictable results.