| http://www.w3.org/ns/prov#value | - What the analytical profile showed was that the track circuit [???impedence???] would fail to detect a train only for a few seconds and then it appeared to be working again,??? Metro General Manager John B. Catoe said in a statement released on Wed., July 1. ???The device communicates information such as speed and distance between the tracks, trains and operations control center.
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