Maybe you should read your own posts. ;)
You said you'd heard NJ was checking speeds and mailing tickets. :)
I agree it would be easy for them to do this and could probably be legal too. Similar to using cameras to ticket people for running red lights.
agesilaus wrote:
Some states are checking speeds in toll plazas:
USA Today
I recall hearing stories about the NJ Turnpike checking how fast you went from point A to point B based on your toll ticket. And then mailing tickets to speeders. It may be apocryphal tho. The same could be done using any of these electronic payment systems, it would be trivial to calculate speed between toll plazas.