A Maryland lawmaker plans to introduce legislation to get rid of the state’s biannual emissions test. The price of the test ...

Unlike passenger vehicles, which require biennial smog checks in California, heavy-duty diesel trucks are not currently required to undergo regular emissions testing. That might change with the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. ST. LOUIS, Mo. — Vehicle emissions testing ...

BAKERSFIELD, Calif. (KERO) — A new tool from the California Air Resources Board aims to reduce harmful emissions and protect public health in the communities like Bakersfield that are highly impacted ...

Unwilling to impose a robust in-service emission testing regime like other OECD countries, the New Zealand government has chosen to monitor the exhaust emissions of “our third-world vehicle fleet” in ...