When somebody mark hidden police, other wazers not everytime see policescan radar and they unmark, but realy there is speed contron. You can see there is or there isn't police car, but policescan radar not all wazers see, because it is small, night time, put near trees, or in the back. I think if somebody mark hidden police, and other wazers can't unmark it 4-6hours it will be better