Queues with Server Vacations as a Model for Pretimed Signalized Urban Traffic

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

António Pacheco (Autor) Outra; M.aria de Lurdes Simões (Autor) FEUP; Paula Milheiro de Oliveira (Autor) FEUP

Revista

Título: Transportation Science

Vol. 51 Nº 3

Páginas: 841-851

ISSN: 0041-1655

Editora: Institute for Operations Research and the Management Sciences

Indexação

ISI Web of Knowledge - 5 Citações

ISI Web of Science

Scopus - 6 Citações

Current Contents

Outras Informações

ID Authenticus: P-00M-PQW

DOI: 10.1287/trsc.2016.0727

Abstract (EN): A queuing system resulting from a signalized intersection regulated by pretimed control in a network of urban traffic is considered. Modeling the queue length and the delay of vehicles is crucial to evaluate the performance of intersections equipped with traffic signals. Air quality and rational use of energy also depend on an efficient management of the intersections. These traffic systems have the specificity that the server (green signal) is deactivated (red signal) during a fixed period of time. In the present work, an M/D/1 queue with a server that occasionally takes vacations is analyzed. The mean delays of vehicles and the mean queue length are computed and compared with those obtained by using a detailed simulation model in a case study. We find that, in general, the mean delays of vehicles given by the proposed queuing model provide a good approximation, but the model can provide slightly smaller values than those obtained in the simulation model for large traffic flows. This result is of interest for traffic engineers, as the approaches one can find in the literature for large signalized urban traffic flows are subject to criticism.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11