複ふく線せん

noun

double track; two-track line

Refers to a railway line with two sets of tracks, allowing trains to run in both directions simultaneously.

• この区く間かんは複ふく線せん化かの工こう事じが進すすんでいる。

  Construction to double-track this section is underway.

• 複ふく線せんのため、列れっ車しゃのすれ違ちがいがスムーズだ。

  Because it's a double-track line, trains can pass each other smoothly.