Investigators to interview train operator, study 'anomaly' in key track circuit. June 25, 2009 — -- Circuits on all Metro train tracks throughout the Washington, D.C., system will now be ...

Investigators say they're looking at a track circuit in the area where Monday's fatal Metro transit train crash occurred. The NTSB says five of six circuits showed no problems during tests, but there ...

WASHINGTON (AP) ó Commuter rail tracks in the nation's capital are studded with devices that detect passing trains and tell them when to stop or slow down. But those devices on the stretch of track ...

In advanced rail traffic operations with train speeds of over 160km/h, uninterrupted train control and protection functions are critically necessary. In addition to visual signalling techniques, the ...