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

primarily serve a function in the event of imminent danger. Therefore, legally, a brief flash

of light does not mean you are granted permission to change lanes. Nor does it give you the right of way. At most, the driver behind you can indicate that he sees sufficient space.

That difference is important. Therefore, always keep looking yourself before moving to the right. Check your mirrors and maintain sufficient distance from the truck . Also, do not drive directly in front of the truck. Heavy vehicles require much more distance to come to a stop. Extra space between your car and