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Top Terms > Communication and control > Control > Control system applications > Traffic control > Railroad traffic control > Railroad traffic control devices

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Railroad traffic control devices (Dcmtry)

Broader Term
Railroad traffic control (Dcmtr)
Narrower Terms
Railroad signals (Dcmtrys)
Track circuits (Dcmtryt)
Related Terms (Hierarchical)
Grade crossing protection systems (Dcmtrg)
Railroad signaling (Dcmtrs)