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Symmetry 2019, 11(1), 55; https://doi.org/10.3390/sym11010055

New Analytic Solutions of Queueing System for Shared–Short Lanes at Unsignalized Intersections

1
Faculty of technical sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21 000 Novi Sad, Serbia
2
Faculty of Architecture, University of Belgrade, Bulevar kralja Aleksandra 73, 11 000 Belgrade, Serbia
*
Author to whom correspondence should be addressed.
Received: 24 November 2018 / Revised: 19 December 2018 / Accepted: 25 December 2018 / Published: 6 January 2019
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Abstract

Designing the crossroads capacity is a prerequisite for achieving a high level of service with the same sustainability in stochastic traffic flow. Also, modeling of crossroad capacity can influence on balancing (symmetry) of traffic flow. Loss of priority in a left turn and optimal dimensioning of shared-short line is one of the permanent problems at intersections. A shared–short lane for taking a left turn from a priority direction at unsignalized intersections with a homogenous traffic flow and heterogeneous demands is a two-phase queueing system requiring a first in–first out (FIFO) service discipline and single-server service facility. The first phase (short lane) of the system is the queueing system M()/M(μ)/1/∞, whereas the second phase (shared lane) is a system with a binomial distribution service. In this research, we explicitly derive the probability of the state of a queueing system with a short lane of a finite capacity for taking a left turn and shared lane of infinite capacity. The presented formulas are under the presumption that the system is Markovian, i.e., the vehicle arrivals in both the minor and major streams are distributed according to the Poisson law, and that the service of the vehicles is exponentially distributed. Complex recursive operations in the two-phase queueing system are explained and solved in manuscript. View Full-Text
Keywords: sustainability; left turn; intersections; lane capacity sustainability; left turn; intersections; lane capacity
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Tanackov, I.; Dragić, D.; Sremac, S.; Bogdanović, V.; Matić, B.; Milojević, M. New Analytic Solutions of Queueing System for Shared–Short Lanes at Unsignalized Intersections. Symmetry 2019, 11, 55.

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