Hi, This info is from an American perspective. The width of car axles is approximately the same as the width of your rails (true in Ngauge, or HO, or S, or O, or G). A one lane country dirt road is approximately (as a minimum) the width of your track and ties. A two lane country dirt road is about the width of two tracks (ties) laid side by side. That two lane road paved would be about three tracks (ties) wide. Four lanes of paved road, highway or city would be about 5 or 6 tracks wide. In your country, I would think the roads would be closer to the minimum in most places, with the vehicles being more narrow than over here.