Asian Journal of Scientific Research1992-14542077-2076Asian Network for Scientific Information10.3923/ajsr.2011.139.148OriT.R. GbahaP. Balou BiJ.T. AsseuO. 2201142The current cars are designed to go more quickly and they must adapt to all extreme situations of urgencies to avoid accidents. Active systems of safety already exist to reduce the task of the drivers but several investigations are still made. The purpose of this research carried out is to improve the existing systems or to propose ones more effective. In this work, a proposal is made to improve control by using the suspensions. These suspensions are controlled by a synthesized LQ law which proved its effectiveness on the braking distance of a vehicle. These same suspensions are tested in this work for an operation of the roundabout type. For this, a model of vehicle in three dimensions is presented to simulate this configuration of control.]]>Andreasson, J. and T. Bunte,200644321328Azadi, S., M. Vaziri and M. Hoseini,201048587617Baffet, G., A. Charara, D. Lechner and D. Thomas,200846501520Cho, W., J. Yoon, J. Kim, J. Hur and K. Yi,20084687105Chu, T.W. and R.P. Jones,2008461731Demic, M.,199423351377Doumiati, M., A. Victorino, A. Charara and D. Lechner,20094715111533Hiroki, K. and K. Shingo,200846161173Kreutz, M., M. Horn and J. Zehetner,20094715511564Ori, T.R.,20012001Ori, T.R., P. Gbaha, O. Asseu and A.L. Bot,201142841Pacejka, H.B.,20062nd Edn.,pp: 156-215pp: 156-215Rashid, M.M., M.A. Hussain and N.A. Rahim,20066933938Shim, T. and C. Ghike,200745191216Venhovens, P.J.T.H. and K. Naab,199932171184