Unit train

A Deutsche Bahn unit train working for Daimler AG between the factories at Sindelfingen and Bremen

A unit train, also called a block train or a trainload service, is a train in which all cars (wagons) carry the same commodity and are shipped from the same origin to the same destination, without being split up or stored en route.[1] They are distinct from wagonload trains, which comprise differing numbers of cars for various customers.[2]

Unit trains enable railways to compete more effectively with road and internal waterway transport systems. Time and money is saved by avoiding the complexities and delays that would otherwise be involved with assembling and disassembling trains at rail yards near the origin and destination. Unit trains are particularly efficient and economical for high-volume commodities. Since they often carry only one commodity, cars are of all the same type; often the cars are identical.

Use

Unit trains are typically used for the transportation of bulk goods. These can be solid substances such as:

Bulk liquids are transported in unit trains made up of tank cars, such as:

  • Crude oil from oil fields to refineries (can be [60,000 barrels (9,500 m3)] of oil in a unit train of 100 tank cars)[4]
  • Mineral oil products from the refineries to the storage facilities
  • Ethanol from ethanol plants to motor fuel blending facilities[5]
  • Molten sulfur (non-US:sulphur)

Food, such as:

Other examples include:

See also

References

  1. ^ "Unit train". Encyclopædia Britannica. 2014.
  2. ^ Oliver Wyman. "The Mixed Train Concept: The Best of Both Worlds for European Rail Freight?" (PDF). www.oliverwyman.com. Archived from the original (PDF) on 2013-06-26. ...trainload service (point to point, complete train for one customer) or wagonload service (single wagons for various customers, assembled into trains)
  3. ^ Cook, Pete (December 1, 2015). "Insights into the Largest Frac Sand Unit Train on Record". Petroleum Connection. Retrieved September 5, 2016.
  4. ^ McGurty, Janet; Adler, Lynn; Gregorio, David (2011-07-22). "Union Pacific sees rail oil shipments quadrupling". Reuters.
  5. ^ Thompson, Stephen (September 2006). "Keep on Truckin': Ethanol boom creates transportation challenges". United States Department of Agriculture. Archived from the original on 2011-05-19.

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