posted on Jul, 11 2015 @ 02:46 PM
The cams in question are to determine if the height of a truck or other vehicle is too high for the roadway, tunnel or underpass.
These are all over the entrances and traffic feeds to the mid-town tunnel and various other roadways & bridges in NYC. They usually come in pairs -
one on the left and one on the right. if the light or signal is disrupted the cops know to stop the vehicle in question.