SETTING FREQUENCIES ON BUS ROUTES: THEORY AND PRACTICE
1981; SAGE Publishing; Issue: 818 Linguagem: Inglês
ISSN
2169-4052
AutoresPeter G. Furth, Nigel H. M. Wilson,
Tópico(s)Urban and Freight Transport Logistics
ResumoSince most transit systems have relatively stable route structures and politically determined levels of subsidy, one of the main recurrent decisions the transit planner must make is the service frequencies to be provided on each route in the system. Current practical and theoretical approaches to this problem are reviewed and, in light of their seeming inadequacies, a new model for setting frequencies is developed. The model allocates the available buses between time periods and between routes so as to maximize net social benefit subject to constraints on total subsidy, fleet size, and levels of vehicle loading. An algorithm is developed to solve this nonlinear program that can be applied by using a small computer program or, simplified in some generally acceptable way, by using a pocket calculator. In a case study the model is shown to produce results quite different from the existing allocation, which suggests changes that are insensitive to the specific set of parameters and objectives. It is shown that the model can readily be applied to evaluate the impacts of an alternative vehicle capacity and to investigate the value of changing service policies. (Author)
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