After overtaking, the truck behind you flashes briefly once: this is what the driver wants to tell you.

but also your caravan, has passed him. This occurs regularly on busy German motorways, for example. However, this does not mean that you must immediately steer to the right. Always check your own mirrors first. You alone remain responsible for a safe lane change.

Vehicle & Traffic Safety

Sometimes a

makes it difficult to 

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see exactly where the rear of the truck ends from the cab. This plays an important role, especially during overtaking. Moreover, trucks often drive at approximately the same speed. As a result, the speed difference during an overtaking maneuver is sometimes only