A lane is a relatively narrow street or road. Most country lanes never get backed up with rush hour traffic.
There's the kind of lane that meanders through wooded, hilly countryside, and then there's the lane that's one particular row of traffic on the a busier road. This second kind of lane is sometimes just one of many options, like on an eight-lane highway. You might also choose a lane in a swimming pool, if you swim competitively or among many lap swimmers.