A level junction is a railway junction that has a track configuration in which merging or crossing railroad lines provide track connections with each other that require trains to cross over in front of opposing traffic at grade.
Several diamond crossings (now obsolete after removal of one track direction) in the Port of Mainz, Germany
A fully assembled level junction used where the Union Pacific and Kansas & Oklahoma tracks cross
Image: Tower 18Northbound Wells Pink Line
Image: CTA loop junction
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