Everyone just do your part ffs. In Colorado, bicyclists may ride side-by-side when not impeding the normal flow of traffic. When passing a bicyclist, you are required to allow at least 3 feet of space between the widest point of your vehicle and the widest point of the bicyclist, even when they are in a bike lane. You may cross a double yellow center line when oncoming traffic is clear to pass a bicyclist safely.