Fuel Smarts

Court Decision Puts GHG Phase 2 Rules for Trailers on Hold

October 27, 2017

TTMA contends that the fleets that can benefit from aerodyamic technology on trailers are already using it voluntarily. Photo: Utility Trailer
TTMA contends that the fleets that can benefit from aerodyamic technology on trailers are already using it voluntarily. Photo: Utility Trailer

A three-judge panel On Oct. 27 granted the Truck Trailer Manufacturers' Association request to provisionally stay the trailer provisions of the greenhouse gas/fuel economy standards that were slated to go into effect in January.

Late last year, TTMA asked the court to review the trailer provisions of the Phase 2 Greenhouse Gas Emissions and Fuel Efficiency Standards, written by the Environmental Protection Agency and the National Highway Traffic Safety Administration.

In August, EPA announced it would revisit the trailer provisions (as well as new rules regarding glider kits) following concerns raised by stakeholders in those industries.

In September, TTMA petitioned the court, this time for a stay of the rules while the litigation ran its course and the agencies decided what to do. EPA responded that it did not have any problems with such a stay, but noted that didn’t mean it agreed with TTMA’s arguments.

Among the trailer makers’ arguments is that the Clean Air Act only allows the government to regulate motor vehicles, and that trailers are not self-propelled and therefore not motor vehicles subject to EPA rules.

The court filing also held that trailer makers will suffer “irreparable harm” without a stay. And, TTMA argued, a stay will not cause public harm, because even if implemented, the rules will have little positive effect on climate change. The types of fleet operations that would benefit from these technologies are already using them, TTMA claimed, and the rules would force trailer makers to put fuel-saving aerodynamic equipment on trailers that would not benefit.

TTMA President Jeff Sims told HDT, “We are pleased with the court's decision and looking forward to EPA's final decision.”

The Environmental Defense Fund criticized the efforts to derail the trailer provisions of the rule and said a stay will “delay these critical health and environmental protections for the duration of the litigation, which could last for years.” 

“In a highly unusual action that emerged publicly at the 11th hour, EPA declined to defend the standards against TTMA’s stay motion,” the advocacy group said in a news release.

But Acting Assistant Attorney General Jeffrey Wood noted that EPA’s plan to revisit the trailer provisions through a notice-and-comment rulemaking could extend into next year –after the rule was supposed to go into effect.

EDF and numerous allies filed court documents opposing TTMA’s request, as did the California Air Resources Board and seven states – Connecticut, Iowa, Massachusetts, Oregon, Rhode Island, Vermont, and Washington.

EDF Attorney Alice Henderson pointed out that this stay has no impact on another provision of the Phase 2 GHG standards that is under review by the EPA that could affect glider kits. “The glider industry never brought a challenge to the glider provisions and in fact, though the rule was published in October 2016, did not even ask the agency to reconsider the glider provisions until July of this year,” she stated.


  1. 1. Richard Wood [ October 27, 2017 @ 11:42AM ]

    This is a positive outcome for the industry due to the simple fact that the aerodynamic fuel saving assessment process used by the federal government is highly flawed which produces misleading results and can be easily manipulated.

  2. 2. Steve Hake [ October 30, 2017 @ 06:12AM ]

    Trailer manufactures are dead on here. EPA over stepped their authority. Besides as they said everybody is already using any aerodynamic device they can that makes real world sense. On long haul trucking an APU or bunk heater will save more fuel than any aerodynamic device ever has.


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