Rhiw Goch is a passing point on the Ffestiniog Railway north of the village of Penrhyndeudraeth in Wales. It was originally a passing loop and an exchange point for the horses that worked the line, op
Rhiw Goch passing loop in 1993
A passing loop or passing siding is a place on a single line railway or tramway, often located at or near a station, where trains or trams travelling in opposite directions can pass each other. Trains
An example of a passing loop with two platforms
Two TGVs crossing each other at a station in France.
Trains in a passing loop at Penryn railway station in the United Kingdom
Passing sidings in North America can be very long. This one in Bolton, Ontario – the track on the right – measures some 3.5 km (2.2 mi).