TA Tamping Taxonomy TCMS terms Thesaurus Third Rail System [[Thyristor]] TINA TRACECA Track Circuits Track Gauge Track Section Cabins Traction/Brake Controller Traction Current Traction Link Traction Motor Tractive Effort Trailer Car Trailing Train Brakes Train Line Train Com] Transom Tread Brake Triple Valve Triple Valve Operation TSI Tumblehome Turnback Track Turnout