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.

Portions of the Department of Transportation are currently in shutdown/furlough status due to a lapse in appropriations. Please continue to monitor this page for updates on DOT’s operating status.
U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

General

Subscribe to RSS

Seismic Testing for Track Substructure Assessment

The University of Illinois at Urbana-Champaign (UIUC) presented equipment, test procedure, and interpretation techniques to rapidly, non-invasively, and quantitatively measure the engineering properties of track substructure (ballast and subgrade). In particular, seismic surface wave testing with...

HQ-2017-1204 (Finalized)

On May 18, 2017, at 11:30 a.m., CDT, a southbound Union Pacific Railroad (UP) train derailed. The derailment occurred near Mason City, Iowa, at milepost (MP) 184.27, on the single main track of the Twin Cities Service Unit, Iowa Area, Mason City Subdivision.