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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Track Geometry Measurement System (TGMS) Inspections

Notice of proposed rulemaking (NPRM).

FRA is proposing to revise its regulations governing the minimum safety requirements for railroad track. The proposed changes would require all Class I and II railroads, as well as intercity passenger railroads and commuter railroads, to operate a qualifying Track Geometry Measurement System (TGMS), a type of automated track inspection (ATI) technology, at specified frequencies on all Class 1 through 5 mainline and controlled siding track that transports: annual tonnage greater than 10 million gross tons (MGT); regularly scheduled passenger rail service; or trains containing hazardous materials. FRA also proposes increasing the required frequency of TGMS inspections on Class 6 track.

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