An indicator provided beyondIn relation to equipment on or alongside the track, positioned such that a train reaches it after passing another defined item of equipment. See also Advance. a TMOAbbreviated term for Traincrew Operated Crossing. crossingA cast or fabricated portion of the track layout which enables the rails of the two tracks to cross each other, while still providing support and guidance for s... to indicate that the barriers
have raised after the passage of a train.