Portable Two-Way Locomotive Derail

Aldon® Roadmaster

Two bogies of Lucknow-Kanpur train derail at Kanpur station, no casualty

Rail - Portable Derails - Western Safety

India passenger train derailment leaves over 280 dead, 900 injured : NPR

Derail Valley on Steam

Hole found under track where train derailed at Grange-over-Sands - BBC News

DE2 Shunter, Derail Valley Wiki

Rail - Portable Derails - Western Safety

Replacement Portable Derail Thumbscrew, 1/2-13 x 2-5/8 Lg.

Railroad Derails/Derailers

DE2 Shunter, Derail Valley Wiki

AOD EOD Automated Derail Operators