Railroad Track
Train Track, Railway Track, Track, Line
noun
A line that runs on a road is a railroad track. First you have to get into your mind that the "line" in question is a railway line. Then, what railway line runs on a road and what kind of road is it? It's a railroad track.
せんろ
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
大雨で、線路わきの土しゃがくずれ、線路が土しゃでうまってしまっているもよう。
It seems that the earth beside the train track collapsed from the heavy rain and covered the tracks.
だれかが線路に立ち入ったため、電車が止まってしまった。
The train has stopped since somebody trespassed on the train tracks.
「あぁ、ごめん。今はあんまりそういう気分じゃないんだ。」「あなた、どうしたの？」「実は、さっきそこの線路で男が飛び込み自殺をするのを目撃したんだ。」
"Well, sorry. I’m not really in that kind of mood right now." "Honey, what’s going on? " "Well, I just saw a guy commit suicide on the railroad track over there."