The agency told the National Pork Producers Council last week it would be publishing a waiver next week in the Federal Register.
The Council, along with a dozen other groups, petitioned the agency for an exemption in mid-June, citing forecasts for above-average temperatures through September that could exacerbate temperature increases for animals being transported.
FMCSA officials also said they would develop a more permanent exemption for livestock and poultry haulers, too.