Stopping a car example with chart

In this post I want to give you an example of what hapens when we press the brake pedal, so I uploaded another chart...

      -the lowest curve (dark blue) expresses braking maneuvre with the ABS on, and on a good grip surface - from 230km/h to a full stop in @ 240 meters;

      -the second one (purple) - without ABS - 230km/h to a full stop in @ 300 meters;

      -third (yellow) - on wet tarmac - 230km/h to a full stop in @ 360 meters;

      - 4th (light blue) - on ice - 230km/h to a full stop in @ 750 meters;

       The braking distance is given by

                          

        V-speed;
        g-gravitational acceleration;(9.81 m/s^2)
        fi-grip coefficient. 0<fi<1 as next

And to think that in Germany you can drink a couple of beers and then run on highways with 300km/h legally...