![]() ![]() tonne-kilometre or kilometre-tonne ( t⋅km or km⋅t, also tkm or kmt), the transportation of one tonne over one kilometre 1 tkm = 1,000 kgkm.kilogram-kilometre ( kg⋅km), moving 1 kg of cargo a distance of 1 km." short ton" is used in the US 1 short ton = 2,000 pounds = 0.907 tonnes.ġ t = (1/0.907) short tons = 1.102 short tons.tonne (t), a non- SI but an accepted metric unit, defined as 1,000 kilograms.kilogram (kg), the standard SI unit of mass.A simple unit of freight is the kilogram-kilometre (kgkm), the service of moving one kilogram of payload a distance of one kilometre. A higher number is more favorable.įreight is measured in mass-distance. Passengers per hour per direction (pphpd) measures the maximum route capacity of a transport system.Ī system may carry a high number of passengers per distance (km or mile) but a relatively low number of passengers per bus hour if vehicles operate in congested areas and thus travel at slower speed.Ī transit system serving a community with a widely dispersed population must operate circuitous routes that tend to carry fewer passengers per distance (km or mile). Main article: Passengers per hour per direction passenger-mile (or pmi ?) sometimes in the US 1 pmi = 1.609344 pkm.passenger-kilometre or pkm internationally.Passenger-distance is the distance (km or miles) travelled by passengers on transit vehicles determined by multiplying the number of unlinked passenger trips by the average length of their trips. Passenger Person (often abbreviated as either "pax" or "p.").vehicle-mile ( vehicle miles traveled, or VMT ) same as before but measures the trip expressed in miles.vehicle-kilometre ( vkm ) as a measure of traffic flow, determined by multiplying the number of vehicles on a given road or traffic network by the average length of their trips measured in kilometres.nautical mile is rarely used to derive units of transportation quantity. ![]() the international statute mile (mi) is used in the US 1 mi = 1.609344 km.kilometre (km) or kilometer is a metric unit used, outside the US, to measure the length of a journey.The units of measurement in transportation describes the unit of measurement used to express various transportation quantities, as used in statistics, planning, and their related applications. What is being carried by air cargo (high CO2 emissions per ton-km) is of much higher added-value than the average freight carried by maritime shipping (low CO2 emissions per ton-km).Ways of measuring the transport of goods and people A similar observation applies to freight. The economic value of the activities is also difficult to compare since a passenger driving a car may not be using it for the same purpose as someone taking a flight. It is important to underline that the performance of passenger and freight vehicles is not readily comparable, since they are using different units of reference a passenger versus a ton. Massification (economies of scale) is a key element in the environmental performance of transport modes and a key argument behind modal shift initiatives, such as towards public transit for passengers and towards rail and maritime shipping for freight. For passengers, it involves grams of CO2 per passenger-kilometer, and for freight, it involves grams of CO2 per ton-km. Transportation modes have a variety of environmental performance that can be measured in terms of CO2 emissions by unit traveled. Average CO2 Emissions by Passenger and Freight Transport Mode ![]()
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