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Both the French and the British terminals of the Eurotunnel Shuttle service through the Channel Tunnel consist of balloon loops.
Occasionally, balloon loops are used for reversing trains on lines with heavy grades and tight curves to equalise wear on both sides of locomotives and rollingstock. Such a balloon loop was constructed at Beech Forest on the 2 ft 6 in (762 mm) Victorian Railways line from Colac to Crowes.
Read more about this topic: Balloon Loop, Examples, Freight