Just for those who live or drive through the Rockville, MD area, speed cameras are coming next month . I think there's a certain threshold above the speed limit before they'll snap a pic of your license plate, but still, be careful!

Other than slowing down (I'm no leadfoot), any proven products to prevent such tickets from cameras? i.e. covers, Photoblocker? I don't live in Rockville itself, but we drive there often and I also work there, and I'd hate to get a ticket since some of the speed limits they set are insanely low for the street conditions.

http://www.rockvillemd.gov/residents....htm#locations(map of preliminary locations)