Friday, August 30, 2013

Cougal railway spiral near Kyogle, Australia


About 20 km north of the town of Kyogle, NSW, is one of the better known features of the Australian railway system: this single track convoluted trajectory, involving a 1.5% curvature compensated gradient is often called the Border Loop as it straddles the the NSW/Queensland border.  It has two short tunnels and a 1 mile (1.6 km) summit tunnel.

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