Large scale traffic simulations

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Large scale microscopic (i.e. vehicle-based) traffic simulations pose high demands on computational speed in at least two application areas: (i) real-time traffic forecasting, and (ii) long-term planning applications (where repeated {open_quotes}looping{close_quotes} between the microsimulation and the simulated planning of individual person`s behavior is necessary). As a rough number, a real-time simulation of an area such as Los Angeles (ca. 1 million travellers) will need a computational speed of much higher than 1 million {open_quotes}particle{close_quotes} (= vehicle) updates per second. This paper reviews how this problem is approached in different projects and how these approaches are dependent both on the specific ... continued below

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Medium: P; Size: 26 p.

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Nagel, K.; Barrett, C.L. & Rickert, M. April 1, 1997.

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Description

Large scale microscopic (i.e. vehicle-based) traffic simulations pose high demands on computational speed in at least two application areas: (i) real-time traffic forecasting, and (ii) long-term planning applications (where repeated {open_quotes}looping{close_quotes} between the microsimulation and the simulated planning of individual person`s behavior is necessary). As a rough number, a real-time simulation of an area such as Los Angeles (ca. 1 million travellers) will need a computational speed of much higher than 1 million {open_quotes}particle{close_quotes} (= vehicle) updates per second. This paper reviews how this problem is approached in different projects and how these approaches are dependent both on the specific questions and on the prospective user community. The approaches reach from highly parallel and vectorizable, single-bit implementations on parallel supercomputers for Statistical Physics questions, via more realistic implementations on coupled workstations, to more complicated driving dynamics implemented again on parallel supercomputers. 45 refs., 9 figs., 1 tab.

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Medium: P; Size: 26 p.

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OSTI as DE97004734

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  • Other Information: PBD: [1997]

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  • Other: DE97004734
  • Report No.: LA-UR--97-281
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/459884 | External Link
  • Office of Scientific & Technical Information Report Number: 459884
  • Archival Resource Key: ark:/67531/metadc675609

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Office of Scientific & Technical Information Technical Reports

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  • April 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Feb. 29, 2016, 3:53 p.m.

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Nagel, K.; Barrett, C.L. & Rickert, M. Large scale traffic simulations, report, April 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc675609/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.