Which defects of a vehicle can result in a danger for road traffic?

All three listed defects can create a hazard for road traffic, which is why all are correct. Worn tyres reduce grip, especially in wet conditions, increasing the risk of skidding or losing control. Defective rear lamps make it harder for other drivers to see your vehicle, especially at night or in poor weather, increasing the chance of being rear-ended. Insufficient braking effect means your car cannot stop as effectively, leading to longer stopping distances and a higher potential for collisions. Any of these technical problems can endanger you and other road users, so vehicles must be maintained regularly and kept in safe operating condition.