In the 3 counties of greater Metro Detroit, we had testing too. Diesels were simply exempt. About 10 - 12 years back they stopped testing all together so all 82 counties of Michigan were the same - no tests.
I actually think they need testing for trucks over 10,000 GVW as we have so many large dump trucks (equals small company with own mechanic) bellowing out large BLACK clouds because their old school mechanic turns up the smoke screw to get a little extra HP. This gives the general public that impression ALL diesels are like the 1979 Olds Cutlass.
Topic: Clean air test in Ontario Canada ? (Read 4223 times)
