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The importance of incorporating the derived demand nature of urban person movement and the interdependence of the elemental travel episodes (trips) in analyses of urban travel behavior is discussed. A flexible and integrated approach to the analysis of daily urban travel-activity behavior as a...
We give a formal proof that a procedure similar to that used in the VAMPIRES program to find a starting fleet size is a lower bound on the minimum fleet size problem when deadheading trips are allowed. It is shown that this bound is stronger than the “simultaneous operation” bound used...
The note assesses the impact on bus ridership of the year-long free fare experiment in Denver, Colorado. Data on ridership from February 1977 through October 1980, which includes 1 year before and 1½ after the experiment, are used to estimate the elasticity of ridership when the fare is reduced...
This paper addresses the problem of peak period traffic congestion. It considers the queues and delays at a single point of insufficient capacity. A model is developed to predict the pattern of traffic volumes and travel times during a peak period. It consists of two basic elements: a...
This paper addresses the problem of describing bus route performance as a first step toward developing strategies for improving service reliability. Previous work in the area has consisted of costly simulation models or analytical treatments of highly simplified problems. An alternative approach...
Alternative variational inequality formulations of the network equilibrium-travel choice problem are given, extending previous results to include models with non-invertible travel demand functions. The model is then developed further to allow for the possibility of dispersion in route choice.
It has been suggested that a used car is scrapped when its price net of repair costs falls below its scrap value. This simple hypothesis captures the essence of the important idea that the life spans of durable goods are determined by both economic and technical considerations. We present...
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