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A safety adapted car following model for traffic safety studies

Bevrani, Kaveh & Chung, Edward (2012) A safety adapted car following model for traffic safety studies. In Stanton, Neville A . (Ed.) Advances in Human Aspects of Road and Rail Transportation. CRC Press, San Francisco, pp. 550-559.

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    Abstract

    Traffic safety studies demand more than what current micro-simulation models can provide as they presume that all drivers exhibit safe behaviors. All the microscopic traffic simulation models include a car following model. This paper highlights the limitations of the Gipps car following model ability to emulate driver behavior for safety study purposes. A safety adapted car following model based on the Gipps car following model is proposed to simulate unsafe vehicle movements, with safety indicators below critical thresholds. The modifications are based on the observations of driver behavior in real data and also psychophysical notions. NGSIM vehicle trajectory data is used to evaluate the new model and short following headways and Time To Collision are employed to assess critical safety events within traffic flow. Risky events are extracted from available NGSIM data to evaluate the modified model against them. The results from simulation tests illustrate that the proposed model can predict the safety metrics better than the generic Gipps model. The outcome of this paper can potentially facilitate assessing and predicting traffic safety using microscopic simulation.

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    ID Code: 52889
    Item Type: Book Chapter
    Additional Information: 2012/08/01 0 doi:10.1201/b12320-63
    Keywords: Car following Models, safety metrics, behavioural modelling, simulation
    DOI: 10.1201/b12320-63
    ISBN: 9781439871232
    Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000)
    Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
    Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000)
    Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > ENGINEERING DESIGN (120400)
    Australian and New Zealand Standard Research Classification > PSYCHOLOGY AND COGNITIVE SCIENCES (170000)
    Divisions: Current > Schools > School of Civil Engineering & Built Environment
    Current > QUT Faculties and Divisions > Science & Engineering Faculty
    Current > Research Centres > Smart Transport Research Centre
    Copyright Owner: Copyright 2013 Taylor & Francis Group
    Deposited On: 02 Aug 2012 14:46
    Last Modified: 23 Aug 2012 00:30

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