Radar dectector won't do all of it for you. They are slowly becoming obsolete because of Laser and even the best radar detector can't pick it up fast enough until its too late. You need a laser diffuser/jammer installed in your car and a radar detector. When the cop points his laser gun at you his gun will read "error" or similar. He won't be able to get a reading. Now of course, don't be going so fast anyway that its obvious that you are speeding. If you're within 10 -12 mph over the limit the cop most likely won't come after you because of his gun not reading..