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Freeway Speeds and Speed Variations Preceding Crashes, Within and Across Lanes

Author

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  • Kockelman, Kara M.
  • Ma, Jianming

Abstract

Relationships between speed choice and crash occurrence have been difficult to identify. This work examines vehicle speeds (and their variations) derived from single loop detectors for several Southern California freeways, within and across freeway lanes, together with corresponding crash data. While a variety of factors clearly influence speed and speed variance, there is no evidence in these crash data sets, and observations of their corresponding series of 30-second traffic conditions, that speeds or their variation trigger crashes.

Suggested Citation

  • Kockelman, Kara M. & Ma, Jianming, 2007. "Freeway Speeds and Speed Variations Preceding Crashes, Within and Across Lanes," Journal of the Transportation Research Forum, Transportation Research Forum, vol. 46(01).
    • Handle: RePEc:ags:ndjtrf:206875
    DOI: 10.22004/ag.econ.206875
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    File URL: https://ageconsearch.umn.edu/record/206875/files/976-1086-1-PB.pdf
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    References listed on IDEAS

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    1. repec:cdl:uctcwp:qt0z88b38t is not listed on IDEAS
    2. Coifman, Benjamin, 2001. "Improved velocity estimation using single loop detectors," Transportation Research Part A: Policy and Practice, Elsevier, vol. 35(10), pages 863-880, December.
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    Cited by:

    1. Wang, Chao & Quddus, Mohammed & Ison, Stephen, 2009. "The effects of area-wide road speed and curvature on traffic casualties in England," Journal of Transport Geography, Elsevier, vol. 17(5), pages 385-395.
    2. Zheng, Zuduo & Ahn, Soyoung & Chen, Danjue & Laval, Jorge, 2011. "Applications of wavelet transform for analysis of freeway traffic: Bottlenecks, transient traffic, and traffic oscillations," Transportation Research Part B: Methodological, Elsevier, vol. 45(2), pages 372-384, February.
    3. Steenbruggen, J. & Borzacchiello, M.T. & Nijkamp, P. & Scholten, H.J., 2011. "The use of GSM data for transport safety management: An exploratory review," Serie Research Memoranda 0032, VU University Amsterdam, Faculty of Economics, Business Administration and Econometrics.
    4. Xiaodong Zhang & Jinliang Xu & Qianqian Liang & Fangchen Ma, 2020. "Modeling Impacts of Speed Reduction on Traffic Efficiency on Expressway Uphill Sections," Sustainability, MDPI, vol. 12(2), pages 1-12, January.
    5. Jin, Jangik & Rafferty, Peter, 2021. "How the speed limit policy affects travel speed?: Quasi-experimental approach," Transport Policy, Elsevier, vol. 103(C), pages 2-10.

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