diff --git a/Car.py b/Car.py
index bd07c12..505a16c 100644
--- a/Car.py
+++ b/Car.py
@@ -179,7 +179,7 @@ class Car():
 
 
        # S = vleader * 3.6 * 0.6
-        Si=self.leaderDist-vleader*0.3
+        Si=self.leaderDist-vleader*1.3
         #S=vf**2 / self.b + vleader**2 / bleader + self.gamma * vf + self.delta
         T=self.T
         vsec=vleader+(Si-vmax*T)/(vbar/bbar+T)