You could argue that yoru speedometer doesnt work too, but in the end its your fault that you have faulty equipment on your car. ITs your job to maintain your vehicle. That is what their argument would be. Its your car, its your fault.
FYI ive got 6 speeding tickets in the past 3 years in kansas, and my rates havnt went up once. Kansas was too confusing to live in. You would be on a road thats posted 65, then the road gets curvy so guess what, they change the speed limit to 55. If you arent familiar with that road, its easy to miss the speed limit signs. afterall, when you get on the highway and you see the speed limit posted, that is usually the last time you LOOK for speed limit signs till you come up to a town. 4 of those 6 tickets were going to work, traveling in a new and unknown area, and missing a speed limit sign. The other 2 tickets were aquired while I was actually conducting surveillance on someone, they were speeding, I was following them, and I got a ticket. go figure.
I'd rather be on rope in a deep deep pit cave.