USA Banner

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.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

General

Crippling Test Of An M1 Passenger Railcar

Occupied volume integrity (OVI) refers to a passenger railcar’s ability to preserve interior cabin space for passengers and crew during an accident. By preventing or minimizing structural deformation of, or intrusions into the rail vehicle's interior, passengers are better able to withstand,...