Got ya, they discontinued the program 5 years ago, lack of money, but theres several hundred of the signs up so its cheaper to leave them up then take them down, and if they get the money to continue it they got ya. The law authorizing it is still on the books
Drones ? Someone say Drones ? There's a lot involved to do it.
http://www.richmond.com/news/virginia/virginia-does-not-enforce-speed-on-the-interstate-with-planes/article_2cc44933-d18e-5058-a9d0-2b4b5d9b0268.html