Phase 2 GHG Rule Delayed, EPA Says

The proposed Phase 2 greenhouse-gas emissions rule for medium- and heavy-duty vehicles, originally planned for publication in March, has been delayed until June, the Environmental Protection Agency announced.

The proposal was sent for White House review on March 27, according to EPA’s Regulatory Development and Retrospective Review Tracker.

The joint EPA-National Highway Traffic Safety Administration proposed rule will address fuel-efficiency standards for medium- and heavy-duty on-highway vehicles for model years beyond 2018 but likely would not take effect before 2020, according to EPA.

The Phase 2 rule will follow the first-ever greenhouse-gas emissions and fuel-efficiency standards issued in 2011.

While the Phase 1 rule addressed engine technologies to reduce emissions, the Phase 2 rule is expected to include technologies for new trailers.