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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 2    February 2017

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Practical approach to determining traffic congestion propagation boundary due to traffic incidents
FEI Wen-peng(费文鹏)1, SONG Guo-hua(宋国华)1, ZHANG Fan(张凡)2, GAO Yong(高永)3, YU Lei(于雷)4

1. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China;
2. China Communications News, Beijing 100011, China;
3. Beijing Transportation Research Center, Beijing 100073, China;
4. College of Science, Engineering and Technology, Texas Southern University, Houston, Texas 77004, USA

Abstract:A practical approach for predicting the congestion boundary due to traffic incidents was proposed. Based on the kinematic wave theory and Van Aerde single-regime flow model, a model for estimating the congestion propagation speed for the basic road segment was developed. Historical traffic flow data were used to analyze the time variant characteristics of the urban traffic flow for each road type. Then, the saturation flow rate was used for analyzing the impact of the traffic incident on the traversing traffic flow at the congestion area. The base congestion propagation speed for each road type was calculated based on field data, which were provided by the remote traffic microwave sensors (RTMS), floating car data (FCD) system and screen line survey. According to a comparative analysis of the congestion propagation speed, it is found that the expressway, major arterial, minor arterial and collector are decreasingly influenced by the traffic incident. Subsequently, the impact of turning movements at intersections on the congestion propagation was considered. The turning ratio was adopted to represent the impact of turning movements, and afterward the corresponding propagation pattern at intersections was analyzed. Finally, an implementation system was designed on a geographic information system (GIS) platform to display the characteristics of the congestion propagation over the network. The validation results show that the proposed approach is able to capture the congestion propagation properties in the actual road network.

 

Key words: kinematic wave model; Van Aerde model; traffic incident; congestion propagation on network

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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