Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/107618
Author(s): António Pacheco
M.aria de Lurdes Simões
Paula Milheiro de Oliveira
Title: Queues with Server Vacations as a Model for Pretimed Signalized Urban Traffic
Issue Date: 2017
Abstract: 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.
URI: https://hdl.handle.net/10216/107618
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
188842.pdf
  Restricted Access
919.64 kBAdobe PDF    Request a copy from the Author(s)
188842.1.pdfexigência da FCT532.7 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.