loop line

/lup laɪn/
noun
  1. A railway or subway line that forms a closed loop, allowing trains to travel in a continuous circle.
    • The loop-line was built to reduce congestion in the downtown area.
    • The city's new loop-line connects all the major suburbs without needing to change trains.
    • Passengers on the loop-line can ride the entire circle in about 45 minutes.
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