Gefahrenlehre
What Gefahrenlehre tests
The Gefahrenlehre domain checks whether a D1 driver recognises hazards early and chooses a safe response before a situation becomes critical. D1 vehicles carry up to 16 passengers excluding the driver, so hazard perception must include passenger safety: standing passengers, door areas, luggage and schoolchildren near stops. The exam expects observation, anticipation, speed choice and a planned escape route, not just knowledge of priority rules.
Core concepts
- Scan far ahead, use all mirrors and check blind spots before every change of direction. A bus has large blind spots, especially at the front right and alongside the doors.
- Keep a safety distance that allows for reaction and braking. In wet or leaf-covered conditions the braking distance grows; reduce speed before the hazard, not during it.
- Anticipate vulnerable road users: children may run out at bus stops, cyclists may pass on the right, pedestrians may cross between parked vehicles.
- Brake smoothly and early when passengers are standing. Sudden braking can cause falls; use the mirrors to monitor passengers after braking.
- Treat every bus stop, school, junction and blind exit as a potential danger zone. Cover the brake and be ready to stop.
Worked example
You drive a D1 bus at 50 km/h on a wet road. A pedestrian waits at a zebra crossing, and the car behind is close. The safe response is to reduce speed early, check the mirrors, cover the brake and stop before the crossing if the pedestrian shows any intention to cross. The close follower is a reason to brake earlier and more gently, not to pass the crossing faster. You must not rely on the pedestrian waiting simply because you have seen them late. If the car behind is too close, leave extra space ahead so you can stop progressively rather than sharply.
Traps that cost marks
Looking only at the vehicle directly ahead; assuming that having priority removes the duty to avoid danger; braking late with standing passengers; forgetting the right-hand mirror and blind spot when leaving a stop; and treating a wet road as having the same grip as a dry one. Another trap is to answer only for the bus and ignore pedestrians, cyclists or children who are not yet in the carriageway but may enter it.