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.

The latest general information on the Coronavirus Disease 2019 (COVID-19) is available on the CDC website.

United States Department of Transportation United States Department of Transportation

About the FRA DOTX-219

A train's operating system.The Office of Safety owns and operates the DOTX-219 to support its mission to reduce track geometry caused derailments nationwide. The DOTX-219 surveys approximately 30,000 miles of United States mainline railroad each year.



A white train in a lot.The DOTX-219:

- Entered service in 2007
- Operates in towed mode
- Is equipped with:
     -Track Geometry Measurement System (TGMS) to measure gage, alignment and track surface and calculate safe train speeds in curved track.
     -Ride Quality Measurement System (RQMS) to measure truck and car body forces in g's
     -Differential Global Measurement System (DGMS) to provide high accuracy GPS coordinates for exceptions and for each foot surveyed
     -Rail Profile Measurement System (RPMS) to measure and quantify absolute and relative parameters of the rail type, rail cant, and wear conditions.
     -Driver View Imaging System (DVIS) for recording reference images of the track right of way (ROW) and track roadbed.

Last updated: Sunday, November 17, 2019