A double junction is a railway junction where a double-track railway splits into two double track lines. Usually, one line is the main line and carries traffic through the junction at normal speed, while the other track is a branch line that carries traffic through the junction at reduced speed.
A True Diamond crossing in Nagpur, India
Image: Double Junction E with Flyover
Image: Chatswood ECR 2005
A railroad switch (AE), turnout, or [set of] points (CE) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off.
A right-hand railroad switch with point indicator pointing to right
Large stations may have hundreds of normal and double switches (Frankfurt am Main main station, Germany).
Abt switch used in the 1895-built Dresden Funicular Railway (photo of 1985)
Control stand of a defunct railroad switch on the way from Pyin Oo Lwin to Goteik viaduct (Myanmar)