“This device indicates a change in conditions entailing a need to adapt your speed. It is used to mark the edge of the carriageway or lane, or to separate traffic directions on complex passages. The device is placed so that the panels lean downwards on the side where traffic must travel. If the device is used for roadworks or temporarily for any other reason, it is red and yellow. In that case, the panels can also be horizontal.” (Traffic Sign Ordinance)