For the first time, the federal government will regulate the fuel efficiency and greenhouse gas emissions of vehicles that do not contain engines. Trailer aerodynamics, rolling resistance, and tare weight all impact fuel consumption of the tractors that pull them. That’s why regulators chose to include trailers in Phase 2 of regulations aimed at medium- and heavy-duty commercial trucks.
The future of fuel economy: Expecting more
Phase 2 mandates will improve trailer efficiency