Ask HN: Catching speeders in my neighborhood?

I live outside a small town where the speed limit is 35 mph down my long road. Drivers are routinely going 60 mph plus. This is not a priority for local law enforcement or the Sheriff or the State Troopers. They sometimes sit out and catch speeders but this is maybe once or twice a year.

Being a geek, my thought is I can mount a large screen outside by the road and show the drivers a picture of their license plate as they drive by.

Power and network cables are easy to run buried in the ground. Perhaps using a Raspberry Pi and an Xbox connect?

I'd appreciate thoughts about the architecture.

Yes, I do realize that drivers might complain to the local law enforcement, but I won't store any data. Just hoping to get traffic to slow down.