The Trump administration has announced it will no longer criminally prosecute “diesel delete” cases of truck owners altering ...

The Trump administration has continued to scale back vehicle emissions-related regulations that were expanded under the ...

A new policy has halted all criminal investigations and prosecutions of those who bypass vehicles' emissions control systems, ...

The Justice Department ordered prosecutors to drop all pending cases targeting the sale of illicit "defeat devices" in diesel ...

A drive cycle is a standardized test procedure to measure a vehicle's emissions and fuel economy. The test is designed to mimic typical driving patterns, such as city and highway driving, and to ...

Long the focus of regulators in their efforts to clean up the air, the automobile has become so clean there are now cases where the air coming out of the tailpipe is cleaner than the surrounding air.