Although the vast majority of vehicles are driven at the “normal speed of traffic” — there are many classes of vehicle (or device) which are by their nature sometimes or always driven at less than the normal speed of traffic, yet are generally allowed on the roadway. These include both motorized and non-motorized vehicles. Operation of these vehicles/devices is allowed unless specifically prohibited; for example bicyclists and motor-driven cycles are not permitted in the roadway on limited access highways. They can also be prohibited by minimum speed limits, however as noted here, in Arizona “Posted minimum speeds are rare. There are NO KNOWN posted minimums on any street in Arizona”.
Besides bicycles, there are many classes of vehicle permitted on any street in Arizona with limitations as noted, these are just examples, there are probably others: Continue reading “Slow by nature”