Use the outside lane for overtaking only.
【lane】外侧车道仅限超车使用。
Outside lane
原声例句
朗文OCLM-01单词
美语情景对话
Yeah, and safely because you know there's not going to be somebody in that outside lane obeying the speed limit to the letter who's going to present a danger to you.
对，安全驾驶，因为不会有严格遵守限速规则的人在外车道对你造成危险。
英语百科
Passing lane
A passing lane (North American English) or overtaking lane (British, Irish and Australian English) is the lane on a multi-lane highway or motorway closest to the center of the road (the central reservation). In some countries, lanes are described as being on the 'inside' or the 'outside' of a road - which one the passing lane is varies (see the section on regional terminology).