Statistical Terms Glossary

Standardised unit of account representing a river stretch of one kilometre with a water flow of one cubic metre of water per second.

The kilowatt hour is a composite unit of energy equivalent to one kilowatt (1 kW) of power sustained for one hour. One watt is equal to 1 J/s. One kilowatt hour is 3.6 megajoules which is the amount of energy converted if work is done at an average rate of one thousand watts for one hour.

Total number of aircrafts that land in all the airports inside Iraq (Iraqi, Arab and foreign)

A place solely for vessels to embark or disembark passengers, not part of an inland port.

The degree to which the landscape facilitates or impedes movement among resource patches. It is expressed in effective mesh size and density.

One of the longitudinal strips into which a carriageway is divisible, whether or not defined by longitudinal road markings, which is wide enough for one moving line of motor vehicles other than motor cycles.

A small naval wood boat used for transferring small quantities shipments like fruits and vegetables.

The total length of railway lines operated for passenger transport, goods transport, or both.

The length of the road is the distance between its start and end point.
Note: If one of the directions of the carriageway is longer than the other then the length is calculated as the sum of the two halves of the distances of both directions of the carriageway from first entry point to last exit point.

Main roads, secondary roads, rural roads and border roads,  These roads are outside the centres of districts, outside the boundaries municipalities of  governorates and outside the borders of the minority of Baghdad, working on the law 35

A method of describing sound levels that vary over time, resulting in a single decibel value which takes into account the total sound energy over the period of time of interest.
- Noise level: a physical scale for the description of environmental noise, which has a relationship with a harmful effect, expressed in decibels (dB).
The standard noise level indicators are:
- Lden (day-evening-night noise indicator): for overall annoyance;
- Lday (day-noise indicator): for annoyance during the day period;
- Levening (evening-noise indicator): for annoyance during the evening period;
- Lnight (night-time noise indicator): for sleep disturbance.

Any accident at level crossings involving at least one railway vehicle and one or more crossing vehicles, other users of the road such as pedestrians or other objects temporarily present at or near the track. Level crossing: Any level intersection between a road and a railway, as authorized by the infrastructure manager and open to public or private road users. Passages between platforms within stations are excluded; Road: For the purpose of Rail Accidents Statistics, any public or private road, street or highway, including footpaths and bicycle lane.

A machine for transporting vessels between water at two different elevations.

Goods road vehicle with a gross vehicle weight of not more than 3 500 kg, designed, exclusively or primarily, to carry goods.

A rail line mainly for urban transport of passengers often electrified. Stations/halts are generally less than 1 200 m apart.

Tractive railway vehicle with a power of less than 110 kW at the draw hook (coupler).

Rail vehicle designed for use on a light rail line.

One or more adjacent running tracks forming a route between two points. Where a section of network comprises two or more lines running alongside one another, there are as many lines as routes to which tracks are allotted exclusively.

One or more adjacent running tracks forming a route between two points. Where a section of network comprises two or more lines running alongside one another, there are as many lines as routes to which tracks are allotted exclusively.

Natural gas converted to liquid form by reducing its temperature to -160°C under atmospheric pressure, to facilitate its transportation. Natural gas consists mainly of methane occurring naturally in underground deposits, associated with crude oil or gas recovered from coal mines (colliery gas).
Note: The density of LNG is between 0.44 and 0.47 tonnes per cubic metre, depending on its composition.

Maximum weight of goods declared permissible by the competent authority of the country of registration of the vehicle.

Maximum volume available in the vehicle (e.g. measured in cubic metres) for the carriage of goods.

Container, swap body.

Serves the internal traffics within a locality.

The place taken into account is the place at which the goods were first pumped-in or first compressed into a pipeline.

An enclosure in an inland waterway with gates at each end to enable the water level to be raised or lowered to allow vessels to pass through. Lift locks are included.

Railway vehicle equipped with prime mover and motor or with motor only used for hauling railway vehicles.

Geographical grouping of independent companies and bodies which are dealing with freight transport (for example, freight forwarders, shippers, transport operators, customs) and with accompanying services (for example, storage, maintenance and repair), including at least a terminal.

Loading/unloading by the vessel’s own derricks/cranes or by shore based cranes.

The vehicles of fixed body used for moving freight and goods weighs nearly (3 -24 tons) ex. (reefer for transporting meat, egg , fish…)