Devices along the route controlled by interaction with the vehicle or train (detonators B61L5/20; operation of points or signals by passage of the vehicle B61L11/00, B61L13/00; operation of gates, or gates and signals, by approaching vehicle B61L29/18)

Child Classifications

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• B61L 1/02 Electric devices associated with track
• B61L 1/12 Electric devices associated with overhead trolley wires
• B61L 1/14 Devices for indicating the passing of the end of the vehicle or train
• B61L 1/16 Devices for counting axles; Devices for counting vehicles
• B61L 1/18 Railway track circuits (rail joints E01B11/00, e.g. insulated rail joints E01B11/54)
• B61L 1/20 Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning