An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Guidance on Communication with Parties outside of the Federal Executive Branch (Ex Parte Communications) This document covers informal rulemaking, agency adjudications, and a wide variety of other administrative proceedings undertaken by the Department, as well as public contacts in...
View a listing of events at the Department of Transportation:
Office of the Secretary
U.S. Transportation Secretary Sean P. Duffy Joins "Keep Wisconsin Trucking Great" Industry Event at Tim Neubauer Trucking in Sparta, WI - March 13, 2026 U.S. Transportation Secretary Sean...Momentum works with global counterparts to leverage transportation investments and policies to promote sustainable economic growth and opportunities. We particularly emphasize emerging markets in the Americas, Africa...
Through Momentum, USDOT supports our global counterparts by connecting them to the Department’s world-leading experts, research, and best practices. Our outreach includes technical assistance, capacity building, and knowledge transfer....
The Momentum Team receives questions about a wide variety of their work. The Momentum Team compiled a variety of the most frequently asked questions below:
The Department of Transportation’s (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA), an Operating Administration within the Department of Transportation (DOT), is responsible for protecting people and the environment by advancing the safe transportation of energy...
The Department of Transportation’s (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA), an Operating Administration within the Department of Transportation (DOT), is responsible for protecting people and the environment by advancing the safe transportation of energy and other...
Hawaiian Airlines Redacted Animal Incident Report January 2022