Explanatory Notes on Main Statistical Indicators





Length of Railways in Operation refers to the total length of the trunk line for passenger and freight transportation (including both full operation and temporary operation). The calculation is based on the actual length of the first line if this line has a full or partial double (or more). Not included are double tracks, station sidings, tracks under the charge of stations, branch lines, special-purpose lines and non-payable connecting lines. The length of railways in operation is an important indicator to show the development of the infrastructure of railway transport. It is also essential data to calculate volume of passenger freight transport, traffic density and utilization efficiency of locomotives and carriages.

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. 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.

Length of Automatic-blocking and Semi-automatic-blocking Railways  Blocking is a spacing technique by which a section of the railway only allows one train to pass at a time with the aim of ensuring traffic safety. Length of automatic-blocking and semi-automatic-blocking railways refers to length of railways installed with equipment to perform automatic or manual blocking of trains.

Length of Highways refers to the length of highways which are built in conformity with the grades specified by the highway engineering standard [Highways WTBZ-Technical Standard JTJ01-88] formulated by the Ministry of Transport, and have been formally checked and accepted by the departments of highways and put into use. The length of highways includes that of the suburb highways at large and medium-sized cities, highways passing through streets at small cities and towns, and also the length of bridges and ferry piers. It does not include the length of streets in big and medium-sized cities and highways built for the production purpose at factories, mines, forest areas and agricultural areas. If two or more highways go the same section of the way, the length of the section is only calculated for once and no duplication is allowed. The length of highways is an indicator to show the development of the scale of highway construction and to provide essential information to calculate the transport network density.

Length of Navigable Inland Waterways   is an indicator reflecting the size and development of inland water network. It refers to the length of the natural rivers, lakes, reservoirs, canals, and ditches open to navigation during a given period, which enables transportation by ships and rafts. It includes the channels open to navigation for over an accumulated period of 3 months in a year, yet this does not include the river courses which are only used to float odd logs and bamboo rafts. This indicator can reflect the scale, level and development situation of the inland waterway network.

Length of Civil Aviation Routes refers to the length of all routes for civil aviation flights, which is used to account the freight, during the period of statistics.. There are usually two ways to calculate the route length: duplicated calculation and non-duplicated calculateion, the former is the sum of length of all civil aviation routes, and the latter should deduct the duplication length of same route among all routes.

Length of Oil (Gas) Pipelines  is used as an indicator to show the development, scale and level of the pipeline transportation. It refers to the actual transport distance of oil (or gas) products, and is in general calculated according to the length of single pipeline. If the length of the double pipelines and alternate pipeline are included, it is called the extension length of the oil (gas) pipelines, which indicates the actual length of the pipelines built. The commonly used indicator, the “length of “oil (gas)” pipelines, does not include the double pipelines. It can reflect the extent and level of development of pipeline transport.

Freight (Passenger) Traffic  refers to the volume of freight (passenger) transported with various means within a specific period of time. This indicator reflects the service of the transport industry towards the national economy and people’s living conditions, as well as an important indicator used in formulating and monitoring transport production plans and research into the scale and pace of transport development.  Freight transport is calculated in tons and passenger traffic is calculated in terms of number of persons. Freight transport is calculated in terms of the actual weight of the goods and takes no account of the type of freight and distance of travel. Passenger traffic is calculated by the principle that one person can be counted only once in one trip and takes no account of the travelling distance and ticket price. The passengers who travel with a half price ticket or a child’s ticket is also calculated as one person.

Freight (Passenger) Traffic Density refers to the freight (passenger) traffic volume carried by a particular means of transportation during a given period through one kilometre of a specific section of transportation route. The formula is as follows:


Freight (passenger) traffic density reflects how busy freight (passenger) traffic is on transportation routes. It provides an important basis for balancing transport capability and throughput capability, planning construction and upgrading of transport routes, installing technical facilities and studying the distribution of transport networks.

Freight Ton-kilometres (Passenger-kilometres) refers to the sum of the product of the volume of transported cargo (passengers) multiplied by the transport distance. It is an important indicator to reflect the achievement of the transportation industry. This is an important indicator to show the total results of the transport industry; to prepare and examine the transport plan; and to serve as the main basic data for calculating the efficiency, labour productivity and unit cost of transport. Normally, the shortest distance between the departure station and the destination station (i.e., the payable distance) is the basis in calculating the freight ton-kilometres. The formula is as follows:


Average Static Load of Freight Cars refers to the average cargo weight as loaded by each freight car under the static condition at the departure station. It is used to show the utilization extent of the loading capacity of the freight cars. The formula is:


The static load of freight cars is determined by the nature and type of goods loaded the type of vehicles, and the technique of loading. Comparison of the average marked load with the static load of freight cars provides indication on the degree of utilization of loading capacity of freight cars. For its calculation the following formula is applied:


Average Daily Haul of Freight Locomotives refers to the average total ton-kilometres accomplished by each freight transport locomotive over one day and night during a given period of time. It includes both the weight of the goods carried and the dead weight of the train itself. It is a comprehensive indicator reflecting the locomotive efficiency in terms of both time and the pulling force.


Volume of Freight Handled in Coastal Ports above Designated size  refers to the volume of cargo passing in and out of the harbour area of the major coastal ports and having been loaded and unloaded. The volume of freight handled may be classified by direction of flow as freight for import and freight for export, or by nature of cargo as freight for domestic trade and freight for foreign trade. The volume of freight handled maybe classified by the classification of cargo, or the current transport standard of The Classification and Code of Cargo Type. Coastal ports refer to the ports, which are located at the edge of an ocean or sea, and with some equipment and facility for ship anchoring, passenger embarking/debarking, cargo loading/unloading, living material provideng, etc. .

Possession of Civil Motor Vehicles refer to the total numbers of vehicles that are registered and received vehicles license tags according to the Work Standard for Motor Vehicles Registration formulated by the Transport Management Office under the department of public security at the end of the reference period. They are divided into categories.  According to the structure of motor vehicles, they are divided into passenger vehicles, trucks and others; according to ownership into private vehicles and vehicles for the unit’s use; according to kind of usage into working vehicles and non-working vehicles; and according to size of vehicles into large passenger vehicles, medium-sized passenger vehicles, small passenger vehicles and mini passenger vehicles, heavy trucks, light-heavy trucks, light trucks and mini-trucks.

Business Volume of Post and Telecommunications refers to the total amount of postal and telecommunication services, expressed in value terms, provided by the post and telecommunications departments for society. This indicator reflects the overall results of development of postal and telecommunication services. It can be classificated as postal services and and telecommunication services. Business volume of post and telecommunications is the sum of all services in kind multiplying with the unit price (constant price) to get the total business value.

Mobile Telephone Subscribers refer to persons who have gone through registration procedures in the operation points of enterprises engaged in telecommunications and are hence connected with the mobile telephone communication network through the mobile telephone switchboards and occupy mobile phone numbers. Included are GSM digital mobile phone subscribers, CDMA digital mobile phone subscribers and subscribers to intelligent phone cards with roaming facility issued by telecommunications enterprises and which have been subscribed to and activated at the end of the reference period.

Internet Users refer to the number of Chinese citizens aged 6 and over who use the Internet at least for one hour each week.

Local Telephone Subscribers refer to all subscribers who have gone through registration procedures in the operation points of enterprises engaged in telecommunications and are hence connected to the local telecommunications service provider through fixed line network. Included are general subscribers, public telephones subscribers, N-ISDN subscribers and intelligent network terminal subscribers. They are also classified in terms of administrative districts as urban telephone subscribers and rural telephone subscribers according to location.

Urban Telephone Subscribers refer to the number of telephone subscribers, located at the different administrative districts of municipalities directly under the Central Government, cities under the jurisdiction of province, cities at prefecture level, downtown and suburb of city at county level town and county towns, that are connected to the public line telephone network, including rural mineral area, forest area, military area.

Rural Telephone Subscribers refer to telephone subscribers, located at the towns below the level of county town and villages, that are connected to the public line telephone network.

Household Telephone Subscribers refer to telephone sets installed in the dwelling units of urban or rural residents, and registered as residence subscribers for payment, including three types of payment for the service: private payment, public payment and free service in accordance with relevant regulations.

Capacity of Long Distance Telephone Exchanges  refers to the rated capacity of telephone exchanges to connect long distance telephone network, including capacity of international telephone exchanges.

Capacity of Office Telephone Exchanges refers to the capacity (measured in gate) of telephone exchanges installed in the offices of telecommunication service providers for communication between fixed telephones. It includes the capacity of both manual and automatic exchanges in use and for stand-by purpose. The capacity of subscriber exchanges is not included.

Capacity of Mobile Telephone Exchanges refers to the capacity of the maximum services provided to subscribers at any one time as computed based on a certain model of calls distribution and transacting capacity of the mobile telephone exchanges.

Broadband Connection Terminals refer to the connection terminals to internet users actually installed and put into operation, including connection terminals for xDSL, connection terminals for LAN, and other connection terminals for xDSL. N-ISDN connection terminals are not included.