Proactive detection of high collision concentration locations on highways

Chung, Koohong, Jang, Kitae, Madanat, Samer and Washington, Simon (2011) Proactive detection of high collision concentration locations on highways. Transportation Research Part A: Policy and Practice, 45 9: 927-934. doi:10.1016/j.tra.2011.04.007


Author Chung, Koohong
Jang, Kitae
Madanat, Samer
Washington, Simon
Title Proactive detection of high collision concentration locations on highways
Journal name Transportation Research Part A: Policy and Practice   Check publisher's open access policy
ISSN 0965-8564
1879-2375
Publication date 2011-11-01
Sub-type Article (original research)
DOI 10.1016/j.tra.2011.04.007
Open Access Status Not yet assessed
Volume 45
Issue 9
Start page 927
End page 934
Total pages 8
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
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.
Keyword Continuous risk profile
Hot spot identification
Proactive detection
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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