Question: I have noticed many motorists that make U-turns at intersections while the light is still red. Is this legal in Arizona, or in the Phoenix area?
Answer: A motorist is allowed to make a U-turn on a red light if the vehicle does not enter over the crosswalk or stop bar while proceeding into the U-turn. No U-turns are allowed at intersections if signs are posted "No U-turn on red" in the state of Arizona.
For example, the only motor vehicle that may have the physical capabilities to perform a U-turn at most intersections on a red light that would not enter the crosswalks or cross the stop bar would be a motorcycle.
This question was answered by Sgt. Mike Ferrara, of the Surprise Police Department's Support Services Unit. Every other week, members of the agency will answer public-safety questions. Send questions to firstname.lastname@example.org
It is however, illegal in florida no matter what according to anything I've found. You can look it up but they may have a provision similar to this. However, it's pretty hard to not disrupt a crosswalk or stop bar(line on the ground).