- rail clip
- rail crane
- rail defect
- rail drilling
- rail grinder
- rail grinding
- rail head
- rail junction
- rail lifter
- rail profile
- rail slipper
- rail splice
- rail stress
- rail stretcher
- rail tongs
- rail train
- rail turner
- rail vehicle
- rail vibrator
- rail web
- rail-mounted
- railbus
- railing stanchion
- railroad center
- railroad map
- railroad operation
- railroad regulations
- railroad ticket
- railroad transport
- railroad underbridge
- railway centre
- railway crossing
- railway gate
- railway overbridge
- railway regulations
- railway underbridge
- raising screw
- raking stem
- ramp
- range light
- rapid transit
- reaction rail
- raking shore
- ram bow
- ram drag
- rampant arch
- random errors
- range pole
- rapid traffic
- rat run
- ratchet brake
- rated capacity
- Raykin fender
- reciprocal bearing
- reclining seat
- ramp status
- range
- rate minimum
- reactance bond
- reading lamp
- rear bogie
- rear propeller
- rearward takeoff
- recessing siding
- recommended speed
- rearview system
- reciprocal course
- recommendation
- recovery
- recruitment
- reduced tariff
- reef
- reef cringle
- refrigerating hold
- refuge
- regional airport
- reduction
- reefing pennant
- reeve
- refit
- refrigerated container
- refrigeration ship
- registered depth
- registrated luggage
- regular schedule
- regulation strategy
- reinforced earth
- relative bearing
- relaying section
- relief track
- refilling
- refrigerated car
- refrigerated wagon
- refueling boom
- refuelling boom
- regenerative braking
- registrated baggage
- removable media
- removal truck
- removal van