The Analysis and Empirical Test on Safe Headway

  • Han XueEmail author
  • Shan Jiang
  • Zhi-xiang Li
Conference paper
Part of the Computational Risk Management book series (Comp. Risk Mgmt)


In order to solve the enormous difference about safe headway between the theoretical value from academic researches and the observational value from practical road conditions, this paper establishes a new vehicle-following model to accurately simulate the vehicle-following process. The model well simulates the actual situation, and provides an operable safety distance reference value for car drivers. Combined with the experiences of outstanding drivers, the model reengineers an integrated process as guidance including maintaining safe headway and changing traffic lane or braking. In addition, the paper discusses the limit of safe headway through sensitive analysis, and finds the reliable measures, so the safe headway could be shortened to improve the efficiency of road utilization. The broad applicability of the conclusion is verified by empirical data.


Car following model Hazard Process reengineering Safe headway Sensitive analysis 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.School of Management and EconomicsBeijing Institute of TechnologyBeijingPeople’s Republic of China

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