- TL
- Abbreviation for Truckload -- The quantity of freight required to fill a trailer; usually more than 10,000 pounds. Compare LTL
- TL Carrier
- A trucking company which dedicates trailers to a single shipper's cargo, as opposed to an LTL (Less Than Truckload) carrier which transports the consolidated cargo of several shippers and makes multiple deliveries. See
- TLV
- Abbreviation for Threshold Limit Value