While I live in Virginia, I heard on a local radio broadcast of The Pat Goss Show, that Maryland is, as of 1 Jul 02, using OBDII as the only input to their emissions "pass-fail" review at inspection time.
This does raise all sorts of interesting scenarios, but, all things being equal, I would assume it also does a better job of ensuring compliance.
The Republican in me says "I HATE the idea of anyone being this invasive ... the Democrat says, "this is a very thorough method of ensuring compliance with air pollution standards."
Someone once told me Democrats were very smart people with bad ideas and Republicans were average people with good ideas ... or was it the other way around ....?
Virginia has no diesel emissions test - even though it isn't napalm, I do love the smell of JP-5 in the morning.
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg