The last thing we need is more laws differentiating bikes and other legal vehicles on the road. I mean, it's bad enough most states have the bicycle inferiority clause stating that bikes must abandon the road if there is an adjacent bicycle facility. That’s why I advocate for multi-use paths instead of bike paths. The law says bicycle path or bicycle facility, so I can still use the road it I want.
Any traffic controls exempting bikes will reinforce ignorant car drivers belief that bikes are illegitimate users of the road and do not have full rights.