The problem, to me, is that this gives the law enforcement the ability to write the tickets, even though they are unenforceable. Write a $500 ticket and most people will pay it rather than hire a lawyer. As I heard one city lawyer state, "Its probably not legal, but most people will just obey the statute rather than take the risk. If someone actually gets cited and takes it to court, we can drop the charges at that time." With that the statute was voted on an passed. Still in effect almost 30 years later. I would guess no one has ever been prosecuted, but it gives the chance for officers to pull over people, harass them and threaten to fine or arrest them if they do not stop the violation.