Imagine all these self driving cars networked together... scanning a 200ft radius millions of times a second creating a effectively recorded 3d world. If there's enough cars, they could have a 3d record of most places - though admittedly storage would be an issue. Good luck trying to do ANYTHING wrong.
"Sorry, car 23034 identified you as speeding, here's your fine..."
On a lighter note, pretty good news for racing sim fans, getting details 3d scans of awesome roads won't be as difficult.
"The way of the world is to praise dead saints and prosecute live ones." -- Nathaniel Howe