Just a warning, today I was driving down GA 400 and noticed a bunch of new concrete posts about 1.5 times as tall as a traffic light all along both sides of the freeway. These posts were about every 1/4th of a mile non-stop and at the top of each of them is a large camera. I then noticed a sign on the side of the road saying "Photo Enforced", similar to those you see around traffic lights with the no-run-red cameras.
I picked up my phone and called the Alpharetta Police Department to find out what was up with this. They redirected my call to the GHP (GA Highway Patrol). As it turns out they're automatic traffic law enforcement cameras. If you speed, they get your license plate number and mail you a citation. If you change lanes without a blinker, they can mail you a citation. If there's a moving accident, they will use the cameras to determine who was at fault. The last isn't so bad, but the speeding thing sucks. I usually cruise down 400 about 15 over, which seems to be the flow of traffic. No more, the GHP said for 15 over, you're pretty much assured a ticket.
I know the cameras are between Holcomb Bridge (exit 7) and Old Milton (exit 10). Not sure beyond there.
That's so incredibly lame. I say if the cops want you to pay them money for a ticket, they can get off their lazy asses and sit beside the freeway watching cars and pegging them by hand.
And yes, the guy at GHP said the cameras are already activated and they're sending out a few real citations now... and are going to start sending out increasing numbers of them soon.