opposite lane; oncoming lane
Refers to the lane for traffic moving in the opposite direction. Often used in driving contexts.
See also: 対向車線 (たいこうしゃせん)
A motorcycle suddenly came out from the opposite lane.
The opposite lane is congested due to an accident.
Synonym; 対向車線 is also common and means the same thing. 反対車線 may be slightly more colloquial.
Compound of 反対 (opposite) + 車線 (lane).