Traffic speed

from Wikipedia, the free encyclopedia

The (spatially averaged) traffic speed indicates the speed of the traffic elements (e.g. vehicles ) that are on a route section of a certain length. It is differentiated from the speed averaged over time .

Related sizes

The speed of traffic can be derived from other traffic science variables. It results from dividing the traffic density by traffic work . Conversely, it is used to calculate one of the two variables from the other or to determine the traffic performance from the product of traffic speed and traffic volume .

Examples

  • spatial speed mean:
If there are 40 vehicles on one kilometer of motorway , the mean of their speed is called the spatially mean traffic speed.
  • temporal speed mean:
If ten vehicles drive over a detector on a motorway in five minutes , the mean of their speed is called the temporal mean speed.
  • Differentiation of the means of speed:
If two vehicles are always driving in a circle, one with a speed of v 1 = 100 km / h and the other with a speed of v 2 = 0 km / h, the spatial average speed is 50 km / h (both vehicles are on the Route section) and the temporal average speed of 100 km / h (the vehicle with a speed of 0 km / h never passes the detector, so it is not measured and is therefore not taken into account in the averaging).

See also

literature

  • Alex Erath, Philipp Fröhlich: The speeds in car traffic and the capabilities of roads over the period 1950-2000 . In: IVT, ETH Zurich (Hrsg.): COST 340: Development of the transit traffic system and its impact on the use of space in Switzerland . Work Report 183 Traffic and Spatial Planning, February 2004 ( ivt.ethz.ch [PDF]).

Web links