Line haul interstation spacing for low cost feeder modes

P. M. Parajuli and S. C. Wirasinghe

Transportation Planning and Technology, 2000, vol. 24, issue 4, 309-348

Abstract: The choice behaviour of low cost travel (LCT) modes is very sensitive to travel distance. A line haul system designed on the basis of current planning practice of locating widely spaced stations to cater auto and bus feeder modes with the primary objective of gaining travel speed is hostile to non-motorized and low cost feeder modes. With the revival of interest in promoting the use of walk'n ride and bike'n ride modes, there is a need to develop an appropriate tool to examine the effect of their specific characteristics in establishing the number and location of stations. A generic normative behavioural hybrid model for locating the cost minimizing number and location of stations is developed for an LCT-fed line haul system. The model considers the system with many to many two dimensional line haul demand density function in which the density varies in both x- and y-directions. The feeder mode choice behaviour is incorporated in the model by integrating probability-access/egress distance function with the objective function. Explicit functional relationships among the parameters of these feeder modes such as modal share as a function of access/egress distance with the parameters of line haul systems are developed. Dynamic programming is used to minimize the system cost. The generic model is shown to collapse into several simplified models capable of yielding approximate solutions for several well known special cases. It has been shown that location of stations is sensitive to the through load on board as well as users’ cost that defines the choice behaviour at large. Numerical examples are presented to demonstrate the applicability of the model.

Date: 2000
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DOI: 10.1080/03081060108717672

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