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.
National, regional, and local governments and authorities have distinct roles to play in supporting a country’s transportation systems. These roles vary from country to country and can involve...
The...