COLUMBUS, Ohio—The U.S. Environmental Protection Agency has rejected Ohio lawmakers’ attempt to allow Cleveland-area vehicle owners to avoid E-Check emissions testing simply by signing a form ...

The California Air Resources Board (CARB) has certified only one telematics provider to participate in its Clean Truck Check (CTC) program with just over a quarter of the year left before heavy- and ...

For the first time in more than two decades, Coloradans will likely see an increase in the fee they pay to receive vehicle emissions tests. Right now, the state’s testing fee is $25 for vehicles made ...