Loop line (railway)
Loop line has several meanings.
- A less important line which leaves a main line and then rejoins it later, continuing in the same direction. Significantly longer than a passing loop, its purpose may be purely to provide a bypassing route, or it may provide a goods or passenger service in its own right, such as the Hertford Loop line.
- A configuration, sometimes known as a balloon loop where trains entering it turn through a half circle and return to the start of the loop facing in the opposite direction from which they came, such as the Sutton Loop.
- A circle route is a totally enclosed system whereby trains always remain in the loop, as in the Glasgow Subway or the London Underground Circle line before the 2009 completion of the extension to Hammersmith.
See also
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