You are travelling at 100 km/h, have a reaction time of 1 second, and brake normally. What is the stopping distance according to the rule of thumb?

The stopping distance consists of two parts: the thinking distance and the braking distance. The thinking distance is the distance your vehicle travels during your reaction time before you start braking. At 100 km/h and a reaction time of 1 second, the thinking distance is about 28 meters (because 100 km/h equals roughly 28 meters per second). The braking distance is the distance your car takes to stop once you apply the brakes. At 100 km/h under normal braking conditions, this is about 100 meters. Adding these together gives a total stopping distance of approximately 130 meters. This rule of thumb helps drivers estimate how far they need to stop safely.