For things related to car maintenance I think there should be a special class of tickets available, a "Provide proof you fixed the problem by {date} or pay {fin

For things related to car maintenance I think there should be a special class of tickets available, a "Provide proof you fixed the problem by {date} or pay {fine}$", they already informally exist (I've known a few people who got a ticket along with the officer's email and told if they provide proof the officer will cancel the ticket). This would take needing discretion out of the question, and also provide better incentive to the driver than "I hope the same cop doesn't pull me over again and remember they already gave me a warning".