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[′tən ′mīl]
(civil engineering)
In railroading, a standard measure of traffic, based on the rate of carriage per mile of each passenger or ton of freight.



a unit of measurement for freight transportation by oceangoing vessels. Ton-miles are calculated by multiplying the weight of the cargo in tons by the distance traveled by the vessel in nautical miles. In the USSR, the ton-mile is used for planning and calculating the freight turnover of oceangoing vessels. In other types of transport, freight turnover is measured in ton-kilometers (1 nautical mile equals 1.852 km).

References in periodicals archive ?
Revenue ton-miles (RTMs), measuring the relative weight and distance of rail freight transported by CN, increased by 18 per cent from the year-earlier quarter.
Over the last four decades total seaborne trade estimates have quadrupled, from just over 8 thousand billion ton-miles in 1968 to over 32 thousand billion ton-miles in 2008.
As Table 5 shows, typical release volumes on rail, particularly of petroleum products, are relatively low at 3,504 gallons per billion ton-miles.
These structural changes combined to more than triple rail traffic density, as measured by the ratio of revenue ton-miles per mile of road.
Census Bureau 1982-1997), we estimate how the annual ton-miles per truck-and-driver combination--what we will call physical trucking productivity--varies with the operational characteristics of these rigs.
Million ton-miles a day is a standard metric used to gauge the capability to push cargo.
The ton-miles of crude and petroleum products carried by pipelines in 1997 was down 0.
Weighted freight ton-miles increased an average of 1.
5 billion in revenues to the larger trucks, a diversion of 9% of railroad ton-miles, a 14% decline in industry gross revenue, and a 52% decline in pre-tax profits.
Second-quarter 2014 revenues increased 17 per cent to C$3,116 million, revenue ton-miles grew by 14 per cent, and carloadings increased 11 per cent.