Ivylog wrote:
OK, if it helps... change commercial to LARGE and non commercial to small in my post. The sensor is in the pavement, it will not count your mud flap. Yes the tolls are calculated by number of axles only and once you go over two they assume you are a LARGE vehicle which costs more per axle than a small vehicle.
I think you are correct, but I'd add that some systems use both a light curtain and treadles (sensors embedded in the road) to increase accuracy of the count.
Clearly the turnpike system is not working at this location because it counted 6 axles rather than 5.