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All explanatory texts were compiled in German and then machine translated. This may result in translation errors. However, this only refers to the explanations to the questions. The translations of the questionnaires were done by TÜV | DEKRA arge tp 21 and are exactly the same as the translations in the theory test. These translations are only available once you are logged in. All other translations on the website were done by a different translation agency.

Sie fahren mit 100 km/h auf einer Straße außerhalb geschlossener Ortschaften. Vor Ihnen fährt ein Lkw mit 70 km/h. Wie weit müssen Sie bei Beginn eines Überholvorgangs von einer Straßenkuppe mindestens noch entfernt sein?

You have a speed surplus of 30km / h against the truck. At 70km / h you have to keep a distance of at least 35 meters. After overtaking, you are allowed to retract 35 meters in front of the truck. So with 30km / h speed surplus you have to travel 2x 35m plus the length of the truck. That's definitely over 70m. If you're driving 100km / h, you're going to drop 200m in 7.2s. During this time, you will win only 60 m from the truck and thus less than the 70 + m. Thus 200 m is not enough to overtake. In 400 m, you win 120 m from the truck, that's enough. However, you have not taken into account the possible oncoming traffic that can come behind the top. Since oncoming traffic like you can drive at 100 km / h, you have to double the 400 m again.
200 m
200 m are not enough to overtake. You have to take into account the speed of the truck and possible oncoming traffic.
800 m
You have to be at least 800 meters away, because here you have to plan your speed, the speed of the truck and of possible oncoming traffic, if you want to overtake the truck safely before the top of the road.
400 m
Because you need to plan the speed of possible oncoming traffic in addition to your speed and that of the truck, you need at least 800 m distance to safely overtake the truck before the top of the road.

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