Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

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.

News Archive

General Content

Engage With Us

HASS COE partners throughout USDOT, academia, and industry:

  • USDOT Operating Administrations: We are...

General Content

Post-Crash Care

Our ability to save lives does not end when a crash occurs. Appropriate medical care for people injured in a crash to prevent their injuries from becoming fatal is critical. The timely arrival...

General Content

Safer Speeds

The Department believes it is important to prioritize safety and moving individuals at safe speeds. Both exceeding the posted speed limit and driving too fast for conditions are speeding-related...

General Content

Safer Roads

Roadway design strongly influences how people use roadways. The environment around the roadway system—including land use and the intersections of highways, roads, and streets with other...

General Content

What Is a Safe System Approach?

U.S. DOT adopts a Safe System Approach as the guiding paradigm to address roadway safety. The Safe System Approach has been embraced by the transportation community as an effective way to address and...

General Content

Uniform Time

The U.S. Department of Transportation (DOT) oversees the Nation's time zones.  The oversight of time zones was assigned to DOT because time standards were first instituted by the railroad...