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A two-step approach to planning new facilities towards equal accessibility

Author

Listed:
  • Xiang Li
  • Fahui Wang
  • Hong Yi

Abstract

A recent advancement in location-allocation modeling proposes a new objective of minimizing inequality of accessibility. Existing work considers the planning problem as either selecting new sites or adjusting facility capacities, separately. This paper develops a two-step hybrid approach to the problem by optimizing both locations and capacities of facilities towards equal accessibility. A genetic algorithm is first employed to find the best locations to site new facilities, and then a quadratic programming method is used to determine the best capacity of each facility within a pre-defined range. The sequence is consistent with many decision-making practices. Results of a series of experiments demonstrate that location optimization reduces inequality in accessibility more significantly than capacity optimization. The two-step optimization method can be applied for sequential allocation decision-makings towards maximum equal accessibility.

Suggested Citation

  • Xiang Li & Fahui Wang & Hong Yi, 2017. "A two-step approach to planning new facilities towards equal accessibility," Environment and Planning B, , vol. 44(6), pages 994-1011, November.
    • Handle: RePEc:sae:envirb:v:44:y:2017:i:6:p:994-1011
    DOI: 10.1177/0265813516657083
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    References listed on IDEAS

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