自然科学版 英文版
自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 8    August 2018

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Identification and characteristics analysis of bottlenecks on urban expressways based on floating car data
ZHANG Jian-bo(张建波)1, SONG Guo-hua(宋国华)1, YU Lei(于雷)1, 2,GUO Ji-fu(郭继孚)1, 3, LU Hong-yu(鲁洪语)1

1. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China;
2. College of Science, Engineering and Technology, Texas Southern University, Houston 77004, USA;
3. Beijing Transport Institute, Beijing 100073, China

Abstract:Identifying bottlenecks and analyzing their characteristics are important tasks to city traffic management authorities. Although the speed difference was proposed for the bottleneck identification in the existing research, the use of a secondary indicator has not been fully discussed. This paper strived to develop a method to identify the bottleneck on expressways by using the massive floating car data (FCD) in Beijing. First, the speed characteristics of bottlenecks on expressway were analyzed based on the speed contour map. The results indicated that there was a significant difference between speeds on the bottleneck and downstream links when a bottleneck was observed. The speed difference could indeed be used as the primary indicator to identify the bottleneck. However, it was also shown that a sufficiently large speed difference does not necessitate an activation of a bottleneck. The speed-at-capacity was then used as the secondary indicator to distinguish the real bottleneck from the non-bottleneck speed difference. Second, a practical method for identifying the bottleneck on expressways was developed based on the speed difference and the speed-at-capacity. Finally, the method was applied to identifying the bottlenecks of the 3rd Outer Ring Expressway in Beijing. The duration, affected distance, delay and cause were used to evaluate and analyze the bottlenecks.

 

Key words: urban expressway; bottleneck identification; speed difference; speed-at-capacity

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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