I disagree on the MPH test.. I think they're a good idea, MPH as measured on the dyno, not by some speedo that could be off by X.. Otherwise, I'm going into the speedo modification business. Your speedo will say 60, but somehow you're emissions will be 30mph.

Why do I disagree?
A car may have a specific hydrocarbon output at a fixed RPM, no load, but under load the engine dynamics change a lot. Rings could be bad, it could begin to immediately barf massive quantities of blue smoke.. These things don't necessarily show up as much under no-load conditions.

I'm a fan of "reasonable" emissions requirements also. That means real world tailpipe emissions. I'm disappointed by states (like TX) that go by strick OBD-II standards, as I've got a car that's now OBD-II non-compliant.. Basically it uses a "spare" section of the ECU to run some non-emissions impacting equipment (intercooler sprayer - water). It fails the emissions tests in TX due to codes for that indicate an automatic transmission error. Oh yea, it has a manual... There is no recourse. Well, unless someone figures out how to "scrub" ecu codes.. :-)

I've talked to TXDOT about the work I do with EFI cars - basically, if they've told me it's completely illegal to modify EFI - they say if I do I can be fined, blah blah blah.. You know, like it is out in California! It doesn't matter if they're pooping out pure C02 and water as the only emissions, if you touch 'em, it's against the law.. A bit of a bummer if you're interested in doing modifications for dual fuel or actually IMPROVING emissions output. This is a real bummer on older vehicles as they tend to pollute more as they age.

More laws.. Just what we need.