A semi-trailer truck (colloquially known as an 18-wheeler, tractor trailer or big-rig in the US, as a semi in Australia, US, and Canada, and as an articulated lorry or artic in the UK and Ireland) is an articulated truck consisting of a towing engine ...
Now interestingly enough, the trucking industry has successfully fought off any legislation to equip tractor trailer trucks from the requirement of event recorders.
Any large motor vehicle on a highway, especially intercity trailer trucks and busses that cut into railroad freight and passenger revenue.
Road Names
Names of various railroad companies in the United States and Canada. Also see Reporting Marks.
Intermodal freight can be transported using shipping containers which can easily be transferred among railroad flatcars, ships, airplanes, and tractor-trailer trucks.
IRJ, IBJ: Insulated rail joint/insulated block joint.
Trailer Truck - A rear locomotive truck with two or four small wheels.
Train Order - A written order on a form which gives directions for train movements not on the schedule; train orders usually come from the dispatcher.
 See also: Point, Trucks, Track, Standard, Unit
  
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