Traffic flow characteristics of bottleneck segment with ramps on urban expressway

Yu Guan; Jishuang Zhu; Ning Zhang; Xiaobao Yang

doi:10.1061/41039(345)278

Traffic flow characteristics of bottleneck segment with ramps on urban expressway

Yu Guan^*
, Jishuang Zhu
, Ning Zhang
, Xiaobao Yang

^*Corresponding author for this work

School of Economics and Management

Beihang University
Beijing Jiaotong University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

The traffic flow characteristics and drivers' behavior between an on-ramp and off-ramp segment are mainly investigated by empirical research. The field data is obtained by the video camera and Metrocount 5710 located at the eastern of Haidian Bridge of Beijing's Fourth Ring Road. From data analysis, it is revealed that the capacity is dropped and a bottleneck is formed on the main road when the on-ramp inflows are larger than a certain threshold. It is also shown that the merge inflows and main road discharge flows have some mutation characteristics. It means that when the on-ramp merge inflows are larger than a certain threshold, there will be capacity drop at shoulder lanes of main road. In addition, when the off-ramp is oversaturated, the queue will block on-ramp vehicles and occupy shoulder lanes of main road. It results in capacity decrease in the segment. Meanwhile, although the density is same before and after the formation of the queue, the velocity of the third lane obviously decreases. Copyright ASCE 2009.

Original language	English
Title of host publication	Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009
Publisher	American Society of Civil Engineers (ASCE)
Pages	1679-1684
Number of pages	6
ISBN (Print)	9780784410394
DOIs	https://doi.org/10.1061/41039(345)278
State	Published - 2009
Event	2nd International Conference on Transportation Engineering, ICTE 2009 - Chengdu, China Duration: 25 Jul 2009 → 27 Jul 2009

Publication series

Name	Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009

Conference

Conference	2nd International Conference on Transportation Engineering, ICTE 2009
Country/Territory	China
City	Chengdu
Period	25/07/09 → 27/07/09

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 11 Sustainable Cities and Communities

Keywords

Bottleneck
Capacity
Drivers' behavior
Ramp
Traffic flow characteristics
Urban expressway

Access to Document

10.1061/41039(345)278

Cite this

Guan, Y., Zhu, J., Zhang, N., & Yang, X. (2009). Traffic flow characteristics of bottleneck segment with ramps on urban expressway. In Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009 (pp. 1679-1684). (Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/41039(345)278

Guan, Yu ; Zhu, Jishuang ; Zhang, Ning et al. / Traffic flow characteristics of bottleneck segment with ramps on urban expressway. Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009. American Society of Civil Engineers (ASCE), 2009. pp. 1679-1684 (Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009).

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title = "Traffic flow characteristics of bottleneck segment with ramps on urban expressway",

abstract = "The traffic flow characteristics and drivers' behavior between an on-ramp and off-ramp segment are mainly investigated by empirical research. The field data is obtained by the video camera and Metrocount 5710 located at the eastern of Haidian Bridge of Beijing's Fourth Ring Road. From data analysis, it is revealed that the capacity is dropped and a bottleneck is formed on the main road when the on-ramp inflows are larger than a certain threshold. It is also shown that the merge inflows and main road discharge flows have some mutation characteristics. It means that when the on-ramp merge inflows are larger than a certain threshold, there will be capacity drop at shoulder lanes of main road. In addition, when the off-ramp is oversaturated, the queue will block on-ramp vehicles and occupy shoulder lanes of main road. It results in capacity decrease in the segment. Meanwhile, although the density is same before and after the formation of the queue, the velocity of the third lane obviously decreases. Copyright ASCE 2009.",

keywords = "Bottleneck, Capacity, Drivers' behavior, Ramp, Traffic flow characteristics, Urban expressway",

author = "Yu Guan and Jishuang Zhu and Ning Zhang and Xiaobao Yang",

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Guan, Y, Zhu, J, Zhang, N & Yang, X 2009, Traffic flow characteristics of bottleneck segment with ramps on urban expressway. in Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009. Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009, American Society of Civil Engineers (ASCE), pp. 1679-1684, 2nd International Conference on Transportation Engineering, ICTE 2009, Chengdu, China, 25/07/09. https://doi.org/10.1061/41039(345)278

Traffic flow characteristics of bottleneck segment with ramps on urban expressway. / Guan, Yu; Zhu, Jishuang; Zhang, Ning et al.
Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009. American Society of Civil Engineers (ASCE), 2009. p. 1679-1684 (Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Zhang, Ning

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N2 - The traffic flow characteristics and drivers' behavior between an on-ramp and off-ramp segment are mainly investigated by empirical research. The field data is obtained by the video camera and Metrocount 5710 located at the eastern of Haidian Bridge of Beijing's Fourth Ring Road. From data analysis, it is revealed that the capacity is dropped and a bottleneck is formed on the main road when the on-ramp inflows are larger than a certain threshold. It is also shown that the merge inflows and main road discharge flows have some mutation characteristics. It means that when the on-ramp merge inflows are larger than a certain threshold, there will be capacity drop at shoulder lanes of main road. In addition, when the off-ramp is oversaturated, the queue will block on-ramp vehicles and occupy shoulder lanes of main road. It results in capacity decrease in the segment. Meanwhile, although the density is same before and after the formation of the queue, the velocity of the third lane obviously decreases. Copyright ASCE 2009.

AB - The traffic flow characteristics and drivers' behavior between an on-ramp and off-ramp segment are mainly investigated by empirical research. The field data is obtained by the video camera and Metrocount 5710 located at the eastern of Haidian Bridge of Beijing's Fourth Ring Road. From data analysis, it is revealed that the capacity is dropped and a bottleneck is formed on the main road when the on-ramp inflows are larger than a certain threshold. It is also shown that the merge inflows and main road discharge flows have some mutation characteristics. It means that when the on-ramp merge inflows are larger than a certain threshold, there will be capacity drop at shoulder lanes of main road. In addition, when the off-ramp is oversaturated, the queue will block on-ramp vehicles and occupy shoulder lanes of main road. It results in capacity decrease in the segment. Meanwhile, although the density is same before and after the formation of the queue, the velocity of the third lane obviously decreases. Copyright ASCE 2009.

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ER -

Guan Y, Zhu J, Zhang N, Yang X. Traffic flow characteristics of bottleneck segment with ramps on urban expressway. In Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009. American Society of Civil Engineers (ASCE). 2009. p. 1679-1684. (Proceedings of the 2nd International Conference on Transportation Engineering, ICTE 2009). doi: 10.1061/41039(345)278

Traffic flow characteristics of bottleneck segment with ramps on urban expressway

Abstract

Publication series

Conference

UN SDGs

Keywords

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