Not enforceable. Or at least entirely winnable in court. Such a victory happened recently in Oregon: https://ij.org/press-release/oregon-engineer-wins-traffic-

Not enforceable. Or at least entirely winnable in court. Such a victory happened recently in Oregon: https://ij.org/press-release/oregon-engineer-wins-traffic-light-timing-lawsuit/ https://ij.org/press-release/oregon-engineer-wins-traffic-li... TL;DR: such restrictions violate your freedom of speech.