Loopline

[…] with the necessary looplines to avoid the broad gauge points at the intermediate stations, with a view to the direct transit of goods traffic along the Northern Railway and its extensions.

Source: wiktionary

In settling the 1925–26 General Strike-Boycott, the British offered a $ 10 million loan to develop Whampoa Port, conditional upon the chief engineer and accountant being British, and upon the construction of the loopline.

Source: wiktionary

Between Raniganj railroad and the Rajmahal loopline a number of coal mines existed.

Source: wiktionary

It might be hidden away but it actually covers 30 hectres in all and can be reached from Salford's network of looplines or the historical Bridgewater Canal.

Source: wiktionary