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Ton mile

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1.(Railroads) A unit of measurement of the freight transportation performed by a railroad during a given period, usually a year, the total of which consists of the sum of the products obtained by multiplying the aggregate weight of each shipment in tons during the given period by the number of miles for which it is carried.


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Among the findings are that the railroad rate of injuries per ton mile was less in the 1990s than in the 1970s.
Output Variables Our study includes three freight output variables: UTGTM = unit train gross ton miles WTGTM = way train gross ton miles TTGTM = through train gross ton miles Each gross ton mile variable (which includes the weight of the train) is scaled down by a factor of average net ton miles (including only the weight of the freight) to gross ton miles for that category of freight to approximate net ton miles in the given category.
5 million ton miles a day, so mobility shortfalls will deepen after the requirement is revised upwards.
 
 
 
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