線路|せんろsenro[1]atamadaka (head-high)

1. nounrailway track; railway line; railroad; railway; track; line
   ポーターはしばしば線路せんろを歩あるいて渡わたらなければならない。↗

   Porters often have to walk across the tracks.

• Synonym鉄道線路てつどうせんろWrittenMore explicitly limited to railways than 「線路」, and it leans toward written or formal prose.
• Related軌道きどうNeutralRefers to the orbits of celestial bodies, and figuratively to an undertaking getting on track, as in 「軌道に乗る」; register is neutral.
• Related鉄路てつろWrittenWritten and literary, referring to the railway itself; in everyday speech say 「線路」.

For railway track in everyday speech, 「線路」 is the default; 「鉄道線路」 and 「鉄路」 suit written prose, 「鉄路」 with a literary flavor. Use 「軌道」 for celestial orbits or being on the right track, as in 「軌道に乗る」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 鉄道車両てつどうしゃりょうが通とおる軌道きどう。
2. 送電そうでんや電信でんしんなどで屋外おくがいに設置せっちされる有線ゆうせん電気でんき回路かいろ。