In the context of traffic control, a
lane is part of a
carriageway (roadway) that is designated for use by a single line of vehicles, to control and guide drivers and reduce traffic conflicts. Most public roads (
highways) have at least two lanes, one for traffic in each direction, separated by
lane markings. On multilane roadways and busier two-lane roads, lanes are designated with
road surface markings. Major highways often have two multi-lane roadways separated by a
median.