1The tracks and roadbed that trains run on; the rail line itself.
線路に物を投げ入れるのは大変危険な行為です。
Throwing objects onto the tracks is an extremely dangerous act.
台風の影響で、この区間の線路が一部冠水した。
Due to the typhoon, part of the track in this section was flooded.
電車が急停止し、線路に人が立ち入ったことがわかった。
The train came to a sudden stop, and it turned out someone had entered the tracks.
新しい線路の建設には多くの時間と費用がかかる。
Building a new railway line takes a great deal of time and money.