Propagation and dissipation of crash risk on saturated freeways

Yan Kuang, Xiaobo Qu, Shuaian Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


This paper presents a simulation-based methodology for examining the propagation and dissipation of crash risks caused by different intensities of disturbances. A modified cellular automata model is developed and validated based on survey data to simulate saturated traffic on the Pacific Motorway (Helensvale section) in Queensland. Two risk indices, individual risk and societal risk, are proposed based on the time-to-collision notion, representing the risk from distinct perspectives. The societal risk is found to be parabolically related to the intensity of the disturbance. This relationship might provide a solution for estimating crashes on saturated freeways.
Original languageEnglish
Pages (from-to)203-214
Number of pages12
JournalTransportmetrica B
Issue number3
Publication statusPublished - 1 Jan 2014
Externally publishedYes


  • cellular automata model
  • crash risk propagation and dissipation
  • freeways
  • time to collision

ASJC Scopus subject areas

  • Software
  • Modelling and Simulation
  • Transportation


Dive into the research topics of 'Propagation and dissipation of crash risk on saturated freeways'. Together they form a unique fingerprint.

Cite this