Push to Roll Back Auto-Emissions Rules Hits a Roadblock

Friction between the federal agencies drafting the regulations threatens further delays, frustrating auto makers

Two federal agencies are struggling to finish new rules to roll back auto-emissions regulations, according to auto industry lobbyists and government officials with knowledge of the process.

28365365体育投注The Environmental Protection Agency and Transportation Department are clashing over the underlying rationale for the new regulations, which are aimed at reducing requirements set under the Obama administration, these people say.