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 when driving at 100 km/h consists of two components: the response distance and the braking distance.

1. **Reaction time**: When you see an obstacle and react, it takes about 1 second before you even begin to brake. At 100 km/h, you travel approximately 28 meters in that time (since 100 km/h converts to about 28 meters per second).

2. **Braking distance**: After starting to brake, it takes additional distance to come to a complete stop. For normal braking at this speed, the rule of thumb suggests that it takes about 90 meters to stop completely.

When you add the response distance (28 meters) and the braking distance (90 meters), you get approximately 130 meters.

Understanding these distances is important as they help ensure you maintain a safe following distance and react in time to hazards, which is crucial for road safety as per German traffic regulations. Maintaining these guidelines helps prevent accidents and contributes to a safer driving environment for all road users.