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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 ?
USDA reported that Montana had the 7th lowest and North Dakota the 8th lowest average grain and oilseed rates per ton-mile in the 2006-2010 period for 36 states.
The rates of injury per ton-mile in Table 4 are most pertinent, however.
cartage costs had been but 94/100ths of 14 per ton-mile for the entire industry during calendar 1957.
Flores (1993) indicated that muleteers usually charged 23 cents per ton-mile for the route Arequipa-Puno and 31 cents per ton-mile for the route Arequipa-Cuzco [58].
Between 1980 and 2008, the real revenue per ton-mile decreased by almost 50 percent, with all commodity groups experiencing decreases of at least 30 percent.
In addition, the VIUS survey design uses this weight as a major demarcation, so vehicles with this GVW or greater are sampled more heavily than are lighter vehicles, and the average loaded weight, required for ton-mile estimation, is only reported for vehicles above this boundary.
Compared to rail and inland waterways, road transportation produces about four times more nitrogen oxides, sulfur, and carbon dioxide per ton-mile (Van Ierland et al.
4 percent in total ton-mile movements for all modes of transportation during the same period.
Tanker market could see additional changes on trade route patterns and ton-mile demand.
For the Freighter, which costs only a shilling a ton-mile to operate even when less than three-quarters loaded, the Bristol Aeroplane Company has invented a special method of freight handling; which goes a long way towards solving the problems of packaging, ground-handling, anchorage, and accessibility on the journey.
Pursuant to a multiyear aircraft, crew, maintenance and insurance outsourcing contract, Atlas Air expects to operate two 747-8F aircraft, offering next-generation performance in payload, fuel efficiency, total cost per ton-mile and environmental compliance, on behalf of Panalpina, a Swiss-based global freight forwarding and logistics services provider.
A ton-mile is one ton of freight shipped one mile--a combined measure of both the weight shipped (short tons or 2,000-pound tons) and the distance (miles).