Well, if you don't want a speeding ticket, don't speed. I cringe everytime I hear that in Edmonton, Canada. I've had two speeding tickets and on both occasions I had to search for the speed limit sign afterwards. In one case the driver would have to ignore the traffic they were merging with and watch the opposite side of the street to see the sign; in the case of the other ticket the sign was frequently obscured by parked buses. The photo radar trap undercover trucks used to sit outside my block of flats. That was irresponsible because the industrial strength flash gun on the truck when activated blinded passing pedestrians when it fired in their faces. But trying proving in 20 years' time that your blindness was caused by the retinal damage done by that flash. The speed limit sign for that stretch of road was tiny. Most of my neighbours certainly didn't know the limit was dropped by 10 kilometres an hour at the end of the street. Then a bigger sign was put up and the speed trap vanished. Weeks later the photo radar trap trucks had returned. Right enough, the bigger  sign was gone and the tiny one was back. Recently, the trap trucks have been painted bright yellow but the speed limit signs are still tiny or badly positioned.