環かん状じょう線せん

noun

loop line; belt line

Refers to a railway or road line that forms a closed loop, often circling a city center. Common in urban transit contexts.

• 東とう京きょうの山手線やまのてせんは環かん状じょう線せんの一ひとつです。

  Tokyo's Yamanote Line is one example of a loop line.

• 環かん状じょう線せんが完かん成せいすれば、市し内ないの移い動どうがずっと便べん利りになる。

  Once the loop line is completed, getting around the city will be much more convenient.