Areas or places located along a railway line, bus route, or major thoroughfare; things situated along a transit line.
この沿線には新しいショッピングモールが増えている。
New shopping malls are increasing along this rail line.
沿線の駅前は家賃が高いことが多い。
Areas in front of stations along the line often have high rents.
通勤は沿線の便利さで決めた。
I chose it because of the convenience of the line for commuting.