As in the US, people are bringing in radar detectors to beat the system. There is no such thing as a fool proof system, those who are keen to beat the system will always find a way. I think it will be more effective if Qatar put a lot more police cars to patrol the streets for all sorts of traffic violations and not only speeding. Wreckless driving on the streets of Doha is a much more serious problem than overspeeding IMHO.

"Do not wait to strike till the iron is hot; but make it hot by striking."