On-road diesel vehicles are the leading contributor to air pollution and associated disease burdens. Besides the impact on air quality and public health, black carbon from diesel engine exhaust produces significant near-term climate warming.

This briefing paper identifies several possible levels of stringency for the post-2021 CO2 standards in the European Union for light-duty and heavy-duty vehicles and compares them against economy-wide greenhouse gas reduction targets for 2030 and 2050, as well as the 2050 target for transport sector emission reductions in the EU Green Deal.

This paper summarizes the new vehicle sales market for Class 2 through Class 8 heavy-duty truck and buses in the United States and Canada. In addition, it profiles the early market for zero-emission HDVs and provides a snapshot of the battery-electric and hydrogen fuel cell products available across different truck and bus segments.