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Rocky Mountain double
Semitrailer
Standard double
Straight truck
Tag axle
Tandem
Tandem axle tractor
Tractor
Trailer
Truck tractor
Turnpike double
Twin screws
U.S. Department of Transportation (U.S. DOT)
Accelerator pedal
Air brake application gauge
Air pressure gauge
Ammeter
Antilock brakes
Auxiliary starter button
Axle temperature gauge
Brake controls
Clutch brake
Clutch pedal
Computerized idle timer
Coolant level alarm
Coolant temperature gauge
Coolant temperature warning
Cruise control
Differential warning
Electric retarder