Optimal design and benefits of a short turning strategy for a bus corridor |
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Authors: | Alejandro Tirachini Cristián E Cortés Sergio R Jara-Díaz |
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Institution: | (1) Institute of Transport and Logistics Studies, Faculty of Economics and Business, The University of Sydney, Sydney, NSW, 2006, Australia;(2) Civil Engineering Department, Universidad de Chile, P.O. 228-3, Santiago, Chile |
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Abstract: | We develop a short turning model using demand information from station to station within a single bus line-single period setting,
aimed at increasing the service frequency on the more loaded sections to deal with spatial concentration of demand considering
both operators’ and users’ costs. We find analytical expressions for optimal values of the design variables, namely frequencies
(inside and outside the short cycle), capacity of vehicles and the position of the short turn limit stations. These expressions
are used to analyze the influence of different parameters in the final solution. The design variables and the corresponding
cost components for operators and users (waiting and in-vehicle times) are compared against an optimized normal operation
scheme (single frequency). Applications on actual transit corridors exhibiting different demand profiles are conducted, calculating
the optimal values for the design variables and the resulting benefits for each case. Results show the typical demand configurations
that are better served using a short turn strategy. |
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Keywords: | |
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