In heavy rain, both visibility and road grip deteriorate. Spray from other vehicles, a film of water on the windshield, and reflections from the wet road reduce visibility, while water on the roadway increases the risk of aquaplaning and lengthens braking distance. Therefore, you must reduce your speed, increase the distance to the vehicle in front, drive smoothly without sudden maneuvers, use low beams, and preferably place your wheels in the tracks of other vehicles to get the best possible drainage. The speed limit is an upper limit—in such weather it may be appropriate to drive significantly slower. Incorrect answer choices: Driving fast to arrive quickly increases risk. Low speed does not eliminate the impact on visibility and grip; it only reduces the risk. Rain does not improve road grip; water can form a film that makes the surface more slippery.

Right-of-way is regulated by yield signs and priority road signs, because they determine who has priority and who must yield. Here, A, B, D, and E are such signs (typically Yield, Stop, Priority Road, and End of Priority Road). Sign C is an information sign that only provides information, and F is a mandatory sign indicating required driving/direction. Therefore, only A, B, D, and E regulate right-of-way. Options that include C and F—or “all”—are incorrect.

Even though some tractors and truck combinations signal right to indicate it may be clear to pass, it is never a binding message. When overtaking, you as the overtaking driver always bear full responsibility for ensuring it can be done safely. If you lack sufficient visibility, you must stay behind. Here, the visibility is too poor, so overtaking is out of the question. In addition, a tractor may signal right because it actually intends to turn into a driveway, and large vehicles may move out to the left before making a right turn. Attempting to overtake in such cases can lead to a collision. Therefore, the correct action is to remain behind until you yourself have a clear view and can judge that it is safe.

Option 2 is incorrect because you cannot rely on the signal from the vehicle ahead. Option 3 has the wrong reasoning; the problem here is visibility, not a general prohibition. Option 4 may be sensible as a speed adjustment, but it does not change the main decision: you should not overtake.

The phase after the white line (the point in the figure where the overtaking can no longer be safely aborted) is the most risky. At that point you are in the oncoming lane, often side by side with the vehicle you are passing, and have few or no safe escape options. You are obligated to complete the overtaking, while uncertainty about oncoming traffic, speed, and distance can increase the risk. Before the white line you can always abort, ease off the accelerator, and tuck back in if the situation changes. It is precisely the ability to abort safely that makes the first phase less dangerous. Therefore, plan the overtaking so that you have ample margin to pass and merge back before oncoming traffic, and make sure the decision to proceed is made before you cross the white line.