![]() Automatic (semi-automatic) blocking length of railways refers to railways installed with equipment to perform automatic or manual blocking of trains, the proportion of automatic/semi-automatic blocking length to the total length of railways in operation is an important indicator to show the modernization of railways. The proportion of the length of electrified railways to the total length of railways in operation is an important indicator to show the modernization of railways.Īutomatic-blocking and Semi-automatic-blocking Length of Railways Blocking is a spacing technique by which a section of the railway only allows one train to pass at a time, in order to ensure the traffic safety. Length of Electrified Railways refers to the length of the section of railways in operation in which the power supply lines and other equipment are installed for the running of electrified locomotives. It provides important information for the calculation of the needs for rails, sleepers, sand and stone for the construction of railways. The length of railways in operation is an important indicator to show the development of the infrastructure for the railway transport, and also the essential data to calculate volume of passenger freight transport, traffic density and utilization efficiency of the locomotives and carriages.Įxtenuation Length of Trunk Lines refers to the sum of the first, the second, the third lines and other constructed length of the trunk railways, excluding the extenuation length of the station lines, lines under the jurisdiction of depots, sidings and lines for special purpose. The calculation is based on the actual length of the first line even if this line has a full or partial double track or more tracks, excluding double tracks, station sidings, tracks under the charge of stations, branch lines, special-purpose lines and the non-payable connecting lines. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics (Washington, DC), table 1-50.Length of Railways in Operation refers to the total length of the trunk line under passenger and freight transportation (including both full operation and temporary operation). Army Corps of Engineers, Waterborne Commerce of the United States, Part 5 National Summaries. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics (Washington, DC: December Issues). Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, Freight Analysis Framework.Īir: U.S. Department of Transportation, Bureau of Transportation Statistics, derived from the following data sources:Īir, Truck, Rail, Pipeline, Water: U.S. Pipeline: Data are for both oil pipelines and natural gas.ġ short ton = approximately 0.90718474 metric tons. Road: Data include for-hire and private truck. Return to footnote 1 referrer Notes: The revised numbers are revised from the original source. ![]() ![]() not available for a specific reference period : not available for a specific reference period This table displays the results of Domestic Freight Activity by Mode (tonne-kilometres) (Billions of metric ton-kilometers). Domestic Freight Activity by Mode (tonne-kilometres) (Billions of metric ton-kilometers), United States ![]()
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