Reliable predictive accident models (PAMs) are essential to design and maintain safe road networks, and yet the models most commonly used in the UK were derived using data collected 20 to 30 years ago. Given that the national personal injury accident total fell by some 30% in the last 25 years, while road traffic increased by over 60%, significant errors in scheme appraisal and evaluation based on the models currently in use seem inevitable. In this paper, the temporal transferability of PAMs for modern rural single carriageway A-roads is investigated, and their predictive performance is evaluated against a recent data set. Despite the age of these models, the PAMs for predicting the total accidents provide a remarkably good fit to recent data and these are more accurate than models where accidents are disaggregated by type. The performance of the models can be improved by calibrating them against recent data.


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    Title :

    Updating predictive accident models of modern rural single carriageway A-roads


    Contributors:

    Published in:

    Publication date :

    2013-02-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    A Model to Predict Accident Frequency on Rural Single Carriageway Roads

    Hunt, J. / Mahdi, T. / Statens vag- och transportforskningsinstitut et al. | British Library Conference Proceedings | 1996


    Accident rates and speed consistency, horizontal curves in single carriageway rural roads

    Cardoso, J. L. / Swedish National Road and Transport Research Institute (VTI) / Transportation Research Board et al. | British Library Conference Proceedings | 1997


    Design and operation of single carriageway rural roads

    Hunt, J. / Mahdi, T. / Planning and Transport Research and Computation | British Library Conference Proceedings | 1994


    Developing a speed management assessment framework for rural single carriageway roads

    Lynam, David / Hill, Jeff / Barker, Judith | TIBKAT | 2004

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