Tour Scotland video of meeting a big truck while driving on a single track road on ancestry visit to Angus. I just had to reverse back to junction. A single-track road or one-lane road is a road that permits two-way travel but is not wide enough in most places to allow vehicles to pass one another, although sometimes two compact cars can pass. This kind of road is common in rural areas across the United Kingdom and elsewhere. The term is widely used in Scotland, particularly the Highlands, to describe such roads.