Posting here instead of the FAC.
http://slate.msn.com/id/2104755/

--snip--Cities throughout California—the nation's largest car market—prohibit the heaviest SUVs on many of their residential roads. The problem is, they don't seem to know they've done it.
I know I fall into this category too. My truck has a GVWR of 6200lbs. Most laws are written with GVWR even though that is loaded to capacity. Anyone think they will be enforcing it or changing the law?