Soft Computing

, Volume 22, Issue 5, pp 1421–1432 | Cite as

Early ramp warning using vehicle behavior analysis

  • Hua Cui
  • Zefa Wei
  • Xuan Wang
  • Xinxin Song
  • Pannong Li
  • Huansheng Song
  • Xiang Ma


The ramp entrance connects the main road and the ramp and is the merging zone for vehicles from main road and ramp. As ramp entrance is considered to be the most accident-prone area, this paper focuses on the early warning to avoid collision of vehicles for the ramp entrance on freeway. Firstly, we studied the relation between the vehicle speed and collision risk by analyzing the vehicle trajectories. Secondly, the risk grades were defined based on the lag of the time when vehicles enter into the merging zone from the main road and the ramp. Finally, the risk grade was released by the information board and vehicle terminal to make driver aware of it, so that the vehicles can pass the merging zone in sequence rather than collide with each other. Theoretical analysis and experiment results show that the proposed method could realize early warning for the ramp entrance, reducing the possible traffic accidents.


Ramp entrance Time lag Risk grade Collision warning Vehicle trajectories 



The authors acknowledge the support of the National Natural Science Foundation of China (No. 61572083), the Natural Science Foundation of Shaanxi Province (No.2015JQ6230), and the Special Fund for Basic Scientific Research of Central Colleges (No.310824152009). They furthermore thank the anonymous reviewers for valuable comments

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Hua Cui
    • 1
  • Zefa Wei
    • 1
  • Xuan Wang
    • 1
  • Xinxin Song
    • 1
  • Pannong Li
    • 1
  • Huansheng Song
    • 1
  • Xiang Ma
    • 1
  1. 1.School of Information EngineeringChang’an UniversityXi’anChina

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