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Sustainability 2016, 8(11), 1170; doi:10.3390/su8111170

Designing Sustainable Public Transportation: Integrated Optimization of Bus Speed and Holding Time in a Connected Vehicle Environment

1
School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410004, China
2
Key Laboratory of Road and Traffic Engineering of the Ministry of Education, TongjiUniversity, Shanghai 201804, China
3
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
4
Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science & Technology, Changsha 410004, China
*
Author to whom correspondence should be addressed.
Academic Editor: Bhavik Bakshi
Received: 1 August 2016 / Revised: 27 October 2016 / Accepted: 7 November 2016 / Published: 12 November 2016
(This article belongs to the Section Sustainable Engineering and Science)
View Full-Text   |   Download PDF [1802 KB, uploaded 12 November 2016]   |  

Abstract

Developing public transportation and giving priority to buses is a feasible solution for improving the level of public transportation service, which facilitates congestion alleviation and prevention, and contributes to urban development and city sustainability. This paper presents a novel bus operation control strategy including both holding control and speed control to improve the level of service of transit systems within a connected vehicle environment. Most previous work focuses on optimization of signal timing to decrease the bus signal delay by assuming that holding control is not applied; the speed of buses is given as a constant input and the acceleration and deceleration processes of buses can be neglected. This paper explores the benefits of a bus operation control strategy to minimize the total cost, which includes bus signal delay, bus holding delay, bus travel delay, acceleration cost due to frequent stops and intense driving. A set of formulations are developed to explicitly capture the interaction between bus holding control and speed control. Experimental analysisand simulation tests have shown that the proposed integrated operational model outperforms the traditional control, speed control only, or holding control only strategies in terms of reducing the total cost of buses. The sensitivity analysis has further demonstrated the potential effectiveness of the proposed approach to be applied in a real-time bus operation control system under different levels of traffic demand, bus stop locations, and speed limits. View Full-Text
Keywords: bus operation control; speed adjustment; holding control; advanced public transit systems bus operation control; speed adjustment; holding control; advanced public transit systems
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MDPI and ACS Style

Wu, W.; Ma, W.; Long, K.; Zhou, H.; Zhang, Y. Designing Sustainable Public Transportation: Integrated Optimization of Bus Speed and Holding Time in a Connected Vehicle Environment. Sustainability 2016, 8, 1170.

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