Preliminary communication
https://doi.org/10.7307/ptt.v24i5.1173
A Based-Bottleneck Multiple Vehicle Type Dynamic Marginal Cost Model and Algorithm
Shuguang Li
Abstract
Single vehicle type dynamic marginal cost model is extended to multiple vehicle type dynamic one based on time-dependent multiple vehicle type queue analysis at a bottleneck. A dynamic link model is presented to model interactions between cars and trucks, given the link consists of two distinct segments. The first segment is the running segment on which cars (trucks) run at their free-flow speeds and the second segment is the exit queue segment. A car or a truck is assumed to be a point without length. The class-specific pi parameter is used to transform the effect of truck into passenger car equivalents, so the exit flow of cars and trucks can be calculated according to the exit capacity of a bottleneck. The analytic expression of multiple vehicle type dynamic marginal cost function is deduced under congested and uncongested conditions. Then a heuristic algorithm is presented in solving multiple vehicle type dynamic queues, tolls under system optimum and user equilibrium conditions. The numerical example illustrates the simplicity and applicability of the proposed approach.
Keywords
multiple vehicle types; dynamic marginal cost function; point queue; traffic bottleneck
Hrčak ID:
91804
URI
Publication date:
31.10.2012.
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