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

When you double your speed, the braking distance becomes four times longer because braking distance depends on the square of the speed. This means that if you drive twice as fast, your car needs much more distance to stop safely due to the increased kinetic energy, which grows with the square of velocity. In German traffic rules, this is important to understand for maintaining safe distances and anticipating stops to avoid accidents.