Statistical Centre of Iran > Statistics by Topic > Transport


Definitions & Concepts

Air cargo: a cargo with a bill of lading transported by aircraft, excluding freight carried by the passenger.

Air passenger: a person (excluding pilot and the crew) who travels by plane.

Air postal parcels: all postal parcels such as letters or post depository parcel delivered to the airlines as DEPESH.

Airport: refers to any type of building, installations and equipment located on the land or at sea, all or part of which is used for arrival, departure and traffic of the airplanes.

Bulk carrier (dry): those carrying homogenous shipments and warehouses on a single deck. These carriers usually lack crane and have only two big hooks for handling goods.

City public telephone line: telephone box installed on the thoroughfares to be used for city calls.

Cold storage: an independent establishment    the whole or a part of which is allocated to   carry out activities relating to cold storage services for keeping and reserving crops, livestock products and perishable goods, under certain conditions with respect to temperature,  humidity, etc. and  renders services to the public (whether or not producing services for own use).

Commercial port: a port in which exclusively trade goods are loaded and unloaded.

Commercial-industrial lines of railway: lines which branch off from lines inside the railway station and are connected to inside lines of requesting institutions upon the request of government, industrial or agricultural  and commercial institutions.

Cooperative: refers to company which is formed and registered with at least 7 natural persons or non-government legal persons to meet common needs and improve socio-economic conditions of its members through self-assistance and mutual help based on cooperative law.

Domestic air passenger: a person whose flight and destination is inside the country.

Domestic flight: flight is carried out by domestic airlines whose flight origin and destination is inside the country, even if the flight route crosses the international borders.

Establishment: a place or part of place where continuous and regular activities are carried out under a single management and accounting.

Freeway: a physically separate 2-way traffic motorway without level crossings. The way for entering and leaving it is through certain and limited areas only.

General cargo vessels: vessels with several warehouses on several (usually two or three) decks with cranes for cargo handling.

Gross registered capacity of vessel: capacity of the vessel in ton (100 cubic feet) recorded in the related certificate under international regulations.

Gross weight of freight: total net weight of freight as well as the weight of the train.

Highway (4-line main road): a physically separate 4-way traffic motorway whose crossings can be level too.

Installed   telephone: a   telephone   line   whose essential equipment is installed, but not yet supplied to the  customer.

Inter-city public telephone line: telephone installed on the thoroughfares to be used for inter-city calls.

International in-coming passenger: a person whose flight origin and destination is outside and inside the country respectively.

International out-going passenger: a person whose flight origin and destination is abroad.

Locomotive: a vehicle with propelling power which is used to move wagons and classified by type of energy consumption (electric, diesel and steam) use type (main shunting).

Main tracks: lines which connect railway stations.

Main transmitter: a set of apparatuses and equipment which receives radio or television programmes as sound or  image signals and after amplifying them, covers intended areas on one of the tuned frequencies or channels.

Mobile phone: is a   cellular    telephone system rendering the same services and enjoying the same capabilities as an ordinary digital phone with no need for a fixed place for installation.

Multi-purpose carrier: vessel carrying a variety of cargoes such as containers, miscellaneous goods, bags and bulk. In these vessels, the dimensions of warehouses and decks are usually a multiplier of a 20-foot container. These vessels have a capacity of about 20000 tons with 4 or 5 warehouses as well as 3 to 5 cranes.

Net registered capacity of vessel: gross registered capacity less the volume of space occupied by machinery, employees, warehouses and other space considered for navigation as recorded in the related certificate under international regulations.

Net weight of freight: total weight of commercial and government freight (excluding freight of the railway) as well as the weight of luggage.

Oil tanker: vessel used for transporting liquids.

Operating storage or cold storage: an establishment rendering warehousing or cold storage services during a year for at least 30 days and bearing charges for carrying out its activities as well as earning income.

Other postal units: include rural cooperatives rendering postal services, mobile post, as well as a letter  delivery station.

Parcel: any mail whose weight does not exceed 30 kgs for delivery inside the country and 20 kgs for delivery  abroad (10 kgs for airmail), accepted and sent as registered and insured parcels with declared costs, according to certain regulations.

Port: a vast water area including still main and side basins, docks, installations, equipment, and side buildings located on the land for the traffic of vessels in order to carry out required operation.

Post and telecommunications office: in a number of operating telecommunications or post units within the suburbs or rural areas, mixed postal and telecommunications services are rendered by the person tasked with this responsibility under the management of the post company. This unit is called post and telecommunications office.

Post General Department or Department: main postal units located in the capital of Ostans or Shahrestans (Chapter1, Definitions and concepts), or in one of postal districts of Tehran, where all postal operations and services are carried out.

Postal agency: in rural areas or suburbs where establishment of a postal unit is  not  economical, a postal agency is established. This kind of unit is responsible for receiving and dispatching  ordinary or registered mail. These units are run by one of the local trustworthy people (usually, a local businessman) under a contract.

Postal printed matters: printed matters published as books, newspapers, magazines and publications and handed in to the post office in open packages with different sizes. Their postal charges are less than the other mail.

Postal unit: places where postal services are rendered. Depending on their geographical locations, postal units operate either under other postal units, or directly under the postal executive units whose main activities are logistic and administrative services.

Postbox: the smallest postal unit installed and used in the public thoroughfares (whether cities or villages). When necessary, these units are used only for ordinary mail and the sender drops his or her stamped letter into it.

Railway Luggage: freight which is not allowed to be carried with the passengers in wagon on the basis of railway regulation, but it is carried in a special wagon by passenger trains with the same name.

Railways: tracks for the transport of cargo and/or passengers by rail transport vehicles, which is divided into main track and side track

Regular covered warehouses: warehouses without any mechanized connection with the main silo. Cereals unloaded in these warehouses are transferred into the silo by truck or other vehicles.

Rural    road:   a way which connects   rural production centres to by- roads and main roads.

Rural areas with telephone communication facilities: villages which have access to nationwide telecommunications network through telecommunications offices.

Rural post  office: in certain rural areas qualified for rendering postal services, units called "rural post offices"  are established to render services to  a number of adjacent villages. These offices are responsible for receipt, preparation, dispatch and delivery of mail, as well as sale of postal securities.

Ship: any vessel usually made of metal with an engine and a gross capacity of over 500 tons.

Shunting tracks: tracks established for separating trains from coaches or connecting them to each other in administrative railway stations.

Side tracks: are non-main tracks including commercial-industrial and shunting tracks.

Silo: a place for vertical and horizontal storing. It has a metal or concrete construction for storing grainy and powdery substances in the bulk.

Small packages: any kind of goods, recorded information, magnetic tapes, films whether unexposed or developed, gifts and souvenirs in packages weighing no more than 2 kgs. This kind of parcel is dispatched as registered, insured or express.

Station: a geographical location where main transmitter is installed.

Storage or cold storage in operation: an establishment rendering warehousing or cold storage services during a year for at least 30 successive or non-successive days.

Storage: a place or enclosed area the whole or a part of which is allocated to warehousing.  Storages are divided by type of building (uncovered, covered...), type of use (public and private), type of equipment (mechanized, cold storage, silo, wheat silo, warehouse…) and other features.

Telephone in use: a telephone line supplied to a  customer so that calls could be made through it.

Tonnage: weight of goods carried, with respect to their volumes, in tons or ton equivalent. According to sanctioned tariffs, a certain volume of goods is considered equivalent to one ton and fare must be paid for one ton.

Transportation cooperatives:  a company which is formed and registered with natural persons or non-government legal persons based on cooperative law to transport goods, passengers or both by land, air, and railway.

Uncovered warehouse: a special place within the enclosure of certain silos used for storing wheat for a short time. Wheats unloaded in these warehouses are transferred from loading pitch into the silo as soon as possible.

Urban agency: a non-government postal        unit established by natural persons or legal entities according to a contract concluded between them and the Post Company of the Islamic Republic of Iran to render postal services in urban areas.

Urban post counter: postal units established in areas where there is a high demand for postal services, such as  large public or private institutions. In these counters, negotiable bonds are sold  and  different  kinds  of mail are  received and dispatched in a limited scale.

Urban post office: postal units located in all urban areas which perform operations relating to receipt, preparation, dispatch and delivery  of mail, as well as sale of  postal securities.

Vessel: any type of marine transport means. Vessels may be classified by type and their usage.

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