Therefore, bicycle travel on freeways in Arizona is expressly permitted in all locations except for those specifically posted as prohibited to bicycling. These prohibitions exist only in urban areas or on high-volume interurban routes. Bicycle use on freeways may only be prohibited where an alternate route exists and that alternate route is judged by ADOT to be equal or better for bicycle travel. On freeways, bicycles must travel on the shoulders, not in the travel lanes. On all other highways, standard lane or shoulder use applies.
Cyclists enter and exit the Interstate system using existing ramps.
No special treatment is used at ramps - cyclists watch for traffic as they cross each ramp. There has been no significant accident problem identified with the use of freeway shoulders by cyclists. Updated 17 May 1999 Sign images are from the Manual of Traffic Signs .