Author: Tang, Peiqi
Title: Effects of headway-based control on bus schedule deviations under random passenger arrivals.
Advisors: Gu, Weihua (EE)
Degree: M.Sc.
Year: 2016
Subject: Bus lines -- Management.
Transportation -- Passenger traffic.
Hong Kong Polytechnic University -- Dissertations
Department: Faculty of Engineering
Pages: viii, 26 pages : illustrations
Language: English
Abstract: Bus system is inherently unstable. Without control, buses are failed to adhere to their schedule and tend to bunch up. Control strategies are applied to fight this problem. Holding strategies were proposed scheme to dynamically determine bus holding times at each bus station along the route based on real-time bus operation information. These strategies can compensate the deviations of bus arrival times from the schedule by controlling their holding times. Analytical studies have modeled this bunching problem and also some have modeled the control strategies. However, to the best of our knowledge, there is no analytical work that accounts for the randomness in passenger demand. This report aims to fill this gap in the literature. We will focus on prevailing headway-based control strategies of bus operations, where the dynamic holding times of buses at each control point (i.e. station) are determined by the real-time headway information. We assume passenger arrivals at each station follow a Poisson process, instead of being deterministic. The results show that the randomness in passenger arrivals will amplify the bus schedule deviation, and the amplification factor is proportional to the average number of passengers boarding each bus, and to the inverse of variance in the bus travel time between two consecutive stops. However, the optimal control parameter that minimizes the schedule deviation variance remains the same.
Rights: All rights reserved
Access: restricted access

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