A track arrangement designed to route one rail line underneath another to avoid a flat crossing. By separating the grades, dispatchers can route trains through a busy junction simultaneously without stopping one movement to wait for the other. They are highly expensive to build but drastically increase the capacity and fluidity of a rail corridor.
Heard on the job
Once they finish the dive-under at the junction, we won't have to hold the main waiting for the commuter trains to cross.
Also heard as
- flying junction
- underpass