Chapter
Jul 2, 2019
Traffic Flow Characteristics of Ramp Merging Bottleneck on Urban Expressway
Publication: CICTP 2019
Abstract
With the construction of expressways in cities, the ramp merging bottlenecks have attracted much attention, which restrict the capacity of expressways and affect traffic safety. In this paper, traffic data of upstream section, merging section, and downstream section of the bottleneck in Yingtian Avenue in Nanjing, China are collected and analyzed as an example. The bottleneck characteristics are studied from the perspectives of both macroscopic traffic flow and microscopic vehicle behaviors. The traffic factors affecting the bottleneck are investigated as well. Based on measured traffic data from video observation, characteristics of mainstream flow and merging flow are analyzed on a macroscopic and microscopic level. The relationship between traffic parameters is analyzed to study characteristics of the bottleneck, and three equations are worked out to describe the relevance.
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© 2019 American Society of Civil Engineers.
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Published online: Jul 2, 2019
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Jiangsu Key Laboratory of Urban ITS, Southeast Univ., Nanjing, Jiangsu 211189, China; Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, Southeast Univ., Nanjing, Jiangsu 211189, China; School of Transportation, Southeast Univ., Dong Nan Da Xue Rd., Nanjing, Jiangsu 211189, China. E-mail: [email protected]
Jiangsu Key Laboratory of Urban ITS, Southeast Univ., Nanjing, Jiangsu 211189, China; Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, Southeast Univ., Nanjing, Jiangsu 211189, China; School of Transportation, Southeast Univ., Dong Nan Da Xue Rd., Nanjing, Jiangsu 211189, China. E-mail: [email protected]
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