並へい行こう線せん

noun

parallel railway lines

Refers specifically to two or more railway tracks running side by side without intersecting.

• この区く間かんは並へい行こう線せんになっていて、上じょう下げ線せんが別べつ々べつの線せん路ろを走はしる。

  This section has parallel tracks, with inbound and outbound trains running on separate lines.