You double the speed at which you are travelling. How does this affect the braking distance?

The braking distance increases with the square of your speed. This means if you double your speed, your braking distance becomes four times as long. For example, if it took you 20 meters to stop at 30 km/h, it would take 80 meters at 60 km/h under the same conditions. This is because the energy your car must dissipate through braking is proportional to the square of its speed. Always remember: higher speeds mean much longer stopping distances, even if your reaction time stays the same. This is an important safety principle in German traffic rules.