Association of American Railroads Petition for Hazardous Materials Rulemaking

The Association of American Railroads filed a petition for rulemaking (Docket No. PHMSA-2026-1255) with the Pipeline and Hazardous Materials Safety Administration requesting regulatory action on hazardous materials transportation in the rail industry. The petition asks PHMSA to consider new or revised requirements for rail carriers transporting hazardous materials. PHMSA will evaluate the petition to determine whether sufficient justification exists to initiate formal rulemaking proceedings.

Rail industry stakeholders should monitor PHMSA's response to this petition. No immediate compliance actions are required. If PHMSA proceeds with rulemaking, there will be opportunities to submit comments on any proposed requirements. The petition's scope and specific regulatory changes sought will become clearer once PHMSA publishes its decision or any associated proposed rule.