outside lane
noun uk/ˌaʊt.saɪd ˈleɪn/ us/ˌaʊt.saɪd ˈleɪn/
(ROAD)
[ S ] UK (informal outside)（尤指快车行驶的）外车道，快车道
the part of the road nearest the vehicles going in the opposite direction, used especially by faster vehicles
She cruised by at 160 kilometres per hour on the outside/in the outside lane. 她在外车道上以160公里的时速飞驰。
[ C ] US（尤指慢车行驶的）外车道，慢车道
the part of the road nearest the edge, especially used by slower vehicles
(RACE TRACK)
[ S ]（跑道的）外圈，外道
the part of a race track that is furthest from the centre