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Selecting tram links for priority treatments - The Lorenz Curve approach

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  • Pavkova, Katerina
  • Currie, Graham
  • Delbosc, Alexa
  • Sarvi, Majid

Abstract

Road and public transport authorities often have a difficult task in deciding which road links to select for investment in preferential traffic and public transport measures to improve public transport service performance. This paper presents a new approach which adopts the economic concept of the Lorenz Curve to compare link performance in terms of transit operations as well as weighted passenger volume of travel. The paper explores if, and how, these metrics can be re-interpreted to help with targeting improvements for on-road public transport and priority mitigations. The approach collates operational performance data, in this case link speed and also link public transport travel volume to plot the cumulative distribution of link speed/ridership performance as a curve. Two sets of test applications are presented; on a route level basis and secondly a network level analysis. The network level results present the most powerful results with the Lorenz Curve analysis able to quickly identify links that justify greater attention for preferential treatments since they have the worst 20th percentile of operational performance but the highest 40th percentile of relative link ridership. Mapping shows the problem links to be busy routes leading into the central city. Implications for wider application of these methods are discussed.

Suggested Citation

  • Pavkova, Katerina & Currie, Graham & Delbosc, Alexa & Sarvi, Majid, 2016. "Selecting tram links for priority treatments - The Lorenz Curve approach," Journal of Transport Geography, Elsevier, vol. 55(C), pages 101-109.
    • Handle: RePEc:eee:jotrge:v:55:y:2016:i:c:p:101-109
    DOI: 10.1016/j.jtrangeo.2016.07.011
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    References listed on IDEAS

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    1. Gastwirth, Joseph L, 1971. "A General Definition of the Lorenz Curve," Econometrica, Econometric Society, vol. 39(6), pages 1037-1039, November.
    2. Edward W. (Jed) Frees & Glenn Meyers & A. David Cummings, 2014. "Insurance Ratemaking and a Gini Index," Journal of Risk & Insurance, The American Risk and Insurance Association, vol. 81(2), pages 335-366, June.
    3. Delbosc, Alexa & Currie, Graham, 2011. "Using Lorenz curves to assess public transport equity," Journal of Transport Geography, Elsevier, vol. 19(6), pages 1252-1259.
    4. Graham Currie & Majid Sarvi & Bill Young, 2007. "A new approach to evaluating on-road public transport priority projects: balancing the demand for limited road-space," Transportation, Springer, vol. 34(4), pages 413-428, July.
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    Cited by:

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    2. Apantri Peungnumsai & Hiroyuki Miyazaki & Apichon Witayangkurn & Sohee Minsun Kim, 2020. "A Grid-Based Spatial Analysis for Detecting Supply–Demand Gaps of Public Transports: A Case Study of the Bangkok Metropolitan Region," Sustainability, MDPI, vol. 12(24), pages 1-27, December.
    3. Thitithep Sitthiyot & Kanyarat Holasut, 2020. "A simple method for measuring inequality," Palgrave Communications, Palgrave Macmillan, vol. 6(1), pages 1-9, December.
    4. Andrzej Czerepicki & Tomasz Krukowicz & Anna Górka & Jarosław Szustek, 2021. "Traffic Light Priority for Trams in Warsaw as a Tool for Transport Policy and Reduction of Energy Consumption," Sustainability, MDPI, vol. 13(8), pages 1-22, April.
    5. Caterina Malandri & Luca Mantecchini & Filippo Paganelli & Maria Nadia Postorino, 2021. "Public Transport Network Vulnerability and Delay Distribution among Travelers," Sustainability, MDPI, vol. 13(16), pages 1-14, August.
    6. Shubin Wang & Junsheng Ha & Hakan Kalkavan & Serhat Yüksel & Hasan Dinçer, 2020. "IT2-Based Hybrid Approach for Sustainable Economic Equality: A Case of E7 Economies," SAGE Open, , vol. 10(2), pages 21582440209, May.

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