In an ideal world this thing might work but given the way people drive cars and stack all kinds of crap on top I wonder how it will fare in the real world. Also, no matter if you have a law saying no trucks allowed on certain lanes, what are the chances people will go ahead and drive their trucks on them anyways.
https://www.youtube.com/watch?v=iimq-zpavPg
https://www.youtube.com/watch?v=iimq-zpavPg