- through station
- throw arm
- throw rod
- tidal chart
- tidal signals
- tide rice
- tie bed
- tie pad
- tie station
- timber hitch
- timber wagon
- time indicator
- timetable
- timing reservoir
- tipping bucket
- tipping platform
- tipping wagon
- tire profile
- toe rail
- topping lift
- topsides
- token
- tongue rail
- top rib
- top station
- toe path
- tongue switch
- tons register
- torpedo
- torque converter
- touch bottom
- touchdown speed
- toughened glass
- track ballast
- track bolt
- track circuit
- track deck
- track hand
- track inspector
- track laying
- track maintenance
- track patrol
- track section
- track sled
- track structure
- track walker
- total lift
- total loss
- total track
- touchdown zone
- track aligning
- track assembly
- track condition
- track girder
- track jack
- track liner
- track renewal
- track speeder
- track standard
- track twist
- track work
- tractive unit
- tractor propeller
- trade winds
- topmark
- tow car
- tow train
- towage
- towpath
- track adjusting
- track anchoring
- track chart
- track classification
- track crossing
- track defect
- track diagram
- track gang
- track group
- track inspection
- track layer
- track occupation
- track punch
- track relay
- track shifter
- track stability
- tracklaying machine
- traction motor
- traffic analyser
- traffic analyzer
- traffic artery
- traffic census
- traffic concentration
- traffic conditions
- traffic controller
- traffic convergence
- traffic cut
- traffic demand
- traffic detector
- traffic diagram
- traffic flow