trac - true
- tracer
- track
- track angle
- track angle error
- track controller
- track distance
- track keeping
- track reference
- track separation
- track station
- track-defining aids
- track-defining channelizings
- track-in
- track-keeping
- track-out
- tracker
- tracking
- tracking beam
- tracking flag
- tracking guidance
- tracking radar
- tracking system
- traction
- tractor
- tractor propeller
- traffic
- traffic advisory information
- traffic advisory service
- traffic alert system
- traffic circuit
- traffic control
- traffic control instructions
- traffic control personnel
- traffic control regulations
- traffic department
- traffic documents
- traffic flow
- traffic flow arrangement
- traffic flow rate
- traffic flow summary
