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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 469067, 13 pages
Research Article

Improving Driving Safety Based on Safe Distance Design in Vehicular Sensor Networks

1State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China
2The School of Information Engineering, Chang'an University, Xi'an 710064, China

Received 13 June 2012; Revised 13 September 2012; Accepted 14 October 2012

Academic Editor: Oliver W. W. Yang

Copyright © 2012 Chen Chen 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.


We proposed a Critical Safe Distance (CSD) model in V2V (Vehicle-to-Vehicle) communication systems. By elaborately analyzing the vehicular movement features for car following, we proposed a CSD definition which well balances the requirement between driving safety and traffic throughput efficiency. Different from the time-headway and traditional braking models, our model fully takes the relative movement status of the front and back cars into consideration and derives a CSD which is more practical and effective. We also explore the needed CSD during lane changing for multilane case. Numerical results show that our proposed model could provide reasonable safe distance settings under different movement scenarios, which has the capability of avoiding collisions and improving traffic throughput at the same time.