Two-dimensional bar code (2D bar code)

1) Codes in which information is placed in two dimensions and read from side to side, and up and down, by special scanning equipment and which can be read even if partially damaged. (Source: ILT Supply-Chain Inventory Management SIG)

Twin-steer

1) Heavy vehicle with twin steering axles at front (ie as with rigid eight-wheeler and 'Chinese six' - no longer a popular vehicle configuration).

Twenty-four/seven (or 24/7)

1) Marketing buzz words meaning open round-the-clock seven days a week.

TV in vehicles

1) Only permitted if driver cannot see screen (directly or indirectly) unless provided to give him road information or about his vehicle (when reversing, etc).

Turret truck

1) A type of fork lift truck on which the mast has a rotating head for pallet forks allowing stacking either side of the aisle. In narrow aisle applications, such trucks can operate up to 12-metre heights.

Turns count

1) Regarding tachograph calibration, a count of the drive wheels turning is made on a roller test rig (ie rolling road) to determine the characteristic coefficient of the vehicle (indicated by the symbol 'w' on the calibration plaque).