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Lane-harmonised passenger car equivalents for heterogeneous expressway traffic

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  • Yeung, Jian Sheng
  • Wong, Yiik Diew
  • Secadiningrat, Julius Raditya

Abstract

In order to account for variations in traffic composition during traffic analysis, passenger car equivalent (PCE) factors are used to convert flow rates of various vehicle classes into flow rates in terms of passenger car units (PCUs). Earlier studies have developed various methods to estimate PCE values but only a few of them are based on uninterrupted traffic flow, particularly for flow regimes with heterogeneous traffic where differential (lower) speed limits are imposed on commercial vehicles. This paper proposes a lane-harmonisation approach, which leverages on the high variation in traffic composition across the lanes, to estimate PCE factors for urban expressways. Multiple linear regression is used and the PCE factors obtained for motorcycles, light goods vehicles, and heavy goods vehicles are 0.65, 1.53, and 2.75, respectively. The estimated capacity flow rate after the application of the obtained PCE factors is around 2200 PCUs per hour per lane.

Suggested Citation

  • Yeung, Jian Sheng & Wong, Yiik Diew & Secadiningrat, Julius Raditya, 2015. "Lane-harmonised passenger car equivalents for heterogeneous expressway traffic," Transportation Research Part A: Policy and Practice, Elsevier, vol. 78(C), pages 361-370.
    • Handle: RePEc:eee:transa:v:78:y:2015:i:c:p:361-370
    DOI: 10.1016/j.tra.2015.06.001
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    References listed on IDEAS

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    1. Al-Kaisy, Ahmed F. & Hall, Fred L. & Reisman, Emily S., 2002. "Developing passenger car equivalents for heavy vehicles on freeways during queue discharge flow," Transportation Research Part A: Policy and Practice, Elsevier, vol. 36(8), pages 725-742, October.
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    4. Webster, Nathan & Elefteriadou, Lily, 1999. "A simulation study of truck passenger car equivalents (PCE) on basic freeway sections," Transportation Research Part B: Methodological, Elsevier, vol. 33(5), pages 323-336, June.
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    6. Basu, Debasis & Maitra, Swati Roy & Maitra, Bhargab, 2006. "Modelling passenger car equivalency at an urban midblock using stream speed as measure of equivalence," European Transport \ Trasporti Europei, ISTIEE, Institute for the Study of Transport within the European Economic Integration, issue 34, pages 75-87.
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    Cited by:

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