noun
platform 2; track 2
Refers specifically to the second platform or track at a train station. Used in announcements and directions.
次の急行は２番線から発車します。
The next express train will depart from platform 2.
２番線に電車がまいります。
A train is arriving at track 2.
Compound of 二 (に, 'two'), 番 (ばん, 'number'), and 線 (せん, 'line/track').