Heavy-duty vehicles

The common practice of the Canadian government, when setting vehicle emission standards, has been to harmonize them with those of the U.S. Environmental Protection Agency (EPA) federal standards as much as possible.

Emission standards set out technical specifications for vehicles and engines for exhaust, evaporative and crankcase emissions, in addition to onboard diagnostic systems and other requirements related to emission control systems. The enforcement of the regulations began in 2004 and were phased-in over model years (MY) 2004 to 2010.

During any phase-in period, every model of vehicle or engine that is certified by the U.S. EPA, and that is sold concurrently in Canada and the U.S., is required to meet the same emission standards in Canada as in the U.S.

The phase-i