A 2−1 road (2-minus-1 road) road is a narrow road layout designed mainly for cars and cyclists, where there is one central lane for motor vehicles and two advisory edge lanes on the sides for cyclists. Motor vehicles normally drive in the middle lane, and only move into the side lanes temporarily when passing an oncoming vehicle, giving priority to cyclists using those edge lanes.
A 2-minus-1-road is a type of road with broader shoulders for cyclists and pedestrians, and a narrower lane for cars. (Municipality of Helsingborg, Sweden) © Wikimedia.org/UFO-monumentet, CC BY-SA