You are driving on a road outside a built-up area with three lanes marked in each direction. Individual slower vehicles are travelling well spaced out in the right-hand lane. Which lane may you use continuously?

On a road outside built-up areas with multiple lanes in each direction, German traffic rules require that you keep to the right lanes whenever possible to allow faster vehicles to pass on the left. The right lane is generally for slower traffic. The middle lane can be used continuously if the right lane is occupied by slower vehicles spaced out, as in this case. The left lane is primarily intended for overtaking and should not be used continuously unless traffic conditions require it. So, you may use the middle lane continuously while slower vehicles remain in the right lane, ensuring smoother traffic flow and compliance with the "keep right" principle.