In Traffic Division of the DC Superior Court, judges are sometimes skeptical about radar gun results. It is not that the device itself is inaccurate, but rather the method in which the radar was used to issue a speeding ticket. The officer is supposed to use their own judgment to estimate the speed of a vehicle and then use the radar to confirm this. It is an active process that requires the officer’s attention. If the officer was sitting in the cruiser with a car mounted radar device and waiting for the alarm to go off, this can be challenged in court.