Proactive detection of high collision concentration locations on highways

Koohong Chung, Kitae Jang, Samer Madanat, Simon Washington

    Research output: Contribution to journalArticle

    Abstract

    In previous research (Chung et al., 2009), the potential of the continuous risk profile (CRP) to proactively detect the systematic deterioration of freeway safety levels was presented. In this paper, this potential is investigated further, and an algorithm is proposed for proactively detecting sites where the collision rate is not sufficiently high to be classified as a high collision concentration location but where a systematic deterioration of safety level is observed. The approach proposed compares the weighted CRP across different years and uses the cumulative sum (CUSUM) algorithm to detect the sites where changes in collision rate are observed. The CRPs of the detected sites are then compared for reproducibility. When high reproducibility is observed, a growth factor is used for sequential hypothesis testing to determine if the collision profiles are increasing over time. Findings from applying the proposed method using empirical data are documented in the paper together with a detailed description of the method.

    Original languageEnglish (US)
    Pages (from-to)927-934
    Number of pages8
    JournalTransportation Research Part A: Policy and Practice
    Volume45
    Issue number9
    DOIs
    StatePublished - Nov 1 2011

    Fingerprint

    Deterioration
    empirical method
    hypothesis testing
    Highway systems
    Testing
    Safety
    Intercellular Signaling Peptides and Proteins
    time
    Cumulative sum
    Hypothesis testing
    Growth factors
    Empirical data

    Keywords

    • Continuous risk profile
    • Hot spot identification
    • Proactive detection

    ASJC Scopus subject areas

    • Management Science and Operations Research
    • Civil and Structural Engineering
    • Transportation

    Cite this

    Proactive detection of high collision concentration locations on highways. / Chung, Koohong; Jang, Kitae; Madanat, Samer; Washington, Simon.

    In: Transportation Research Part A: Policy and Practice, Vol. 45, No. 9, 01.11.2011, p. 927-934.

    Research output: Contribution to journalArticle

    Chung, Koohong ; Jang, Kitae ; Madanat, Samer ; Washington, Simon. / Proactive detection of high collision concentration locations on highways. In: Transportation Research Part A: Policy and Practice. 2011 ; Vol. 45, No. 9. pp. 927-934.
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