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Mathematical Problems in Engineering
Volume 2012, Article ID 186383, 14 pages
Research Article

Research on Intersection Signal Switching Model under Emergency Situation

School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

Received 30 May 2012; Accepted 2 September 2012

Academic Editor: Huimin Niu

Copyright © 2012 Li Zongping et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The frequent occurrence of the city emergency leads to rapid development of emergency traffic management which is an important part in the Emergency Rescue System. In the intersection with heavy traffic, the emergency rescue vehicles often with increased delay, reduced safety, and sometimes even with a collision, which restrict the efficiency of the rescue. This paper established the intersection signal control optimization model based on detail analysis of emergency rescue vehicles traffic characteristics and traffic signal control. The models, on one hand, were able to guarantee the emergency vehicles through the intersection quickly and without delay; on the other hand, could ensure the minimum impact to other vehicles in the process of the emergency vehicles through the intersection. Finally, the model’s practicality was verified by real cases.