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Investigators to test automated DC train controls

WASHINGTON - Federal investigators are going to test theautomated system that is meant prevent train crashes like the onein Washington, D.C., that killed nine people.

Debbie Hersman of the National Transportation Safety Board saysinvestigators are going have their first opportunity Wednesday totest the computerized signal system. The train was under automaticcontrol at the time of the crash, and investigators say there wasevidence the operator tried to stop it.

Hersman tells CBS' "Early Show" that investigators are tryingto understand how the automatic system works and if there were anyproblems. Investigators will also review maintenance records.

A train plowed into a stopped train Monday in the deadliestaccident in the 33-year history of the Metro.


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