Comment by spauldo

Any US jurisdiction that bans right on red is going to see a lot of violations - mostly from people who are unaware of the law or people who know the law but accidentally do it out of habit. If DC wanted to stop people from turning right on red, signs would be the only effective solution.

At least with Arizona, it's the whole state so most drivers won't have the habit.

Of course, if DC just wants to take in a lot of easy $100 tickets, this is exactly the way to do it.