diff --git a/Car.py b/Car.py
index f4daca7..ab02742 100644
--- a/Car.py
+++ b/Car.py
@@ -29,16 +29,31 @@ class Car:
         self.initPath()
 
         self.pos=list(self.laneShape[0])
-        self.v=50
+        self.v=0
         self.a=0
+        self.b=20
 
         self.surf=surface
 
     def draw(self,col):
         pg.draw.circle(self.surf,col,self.map.convertPos(self.pos),5)
-    
+   
+    def conduite(self):
+        vmax=10 # vitesse max sur la route actuelle
+        vleader=vmax # vitesse de la voiture leader
+        bleader=15
+        vbar=(self.v+vleader)/2
+        bbar=(bleader+self.b)/2 # decelleration de la vleader et de self
+        S=5
+        T=0.3
+        vsec=vleader+(S-vmax*T)/(vbar/bbar+T)
+        vd=min(vmax,vsec)
+        self.v=max(0,vd)
+
     def update(self,dt):
+        self.conduite()
         lgt=self.v*dt
+
         while(lgt>0):
             endPos=self.laneShape[self.laneInd+1]
             l=math.dist(self.pos,self.laneShape[self.laneInd+1])