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

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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.

The latest general information on the Coronavirus Disease 2019 (COVID-19) is available on For USDOT specific COVID-19 resources, please visit our page.

Zip and Audio Files

Due to the risks involved in hosting native, binary encoded content that can be exploited to compromise a visitor's computer and deliver malware (malicious software), audio files are not hosted on the DOT website. Zip files may be hosted on the DOT website using a Secure Copy Client tool for transferring files securely between computers using an SSH connection.

Last updated: Friday, November 29, 2019