A study on the safety-capacity tradeoff improvement by warning communications

This paper studies the contribution of warning communications in a vehicles string. After having presented the capacity and safety notions, two approaches of the evaluation of the communication impact on the safety-capacity tradeoff are presented. The first approach proposes a formal expression of the number of collisions in a uniform vehicles string (unequipped or fully equipped in communication means). The second approach is complementary to the first one. It focuses on the gain in safety for a partial communication equipment of the string. Moreover this second approach includes two different safety indexes: the first one is based on the number of collisions, the second one is based on the severity of shocks. The analysis estimates the gain in respect to the penetration ratio of the new technology. To carry out this analysis, we focus on the safety and capacity improvement in a vehicles string. We consider a disaster scenario called bricks wall and alert communication systems