A passing siding or loop on a single-track line. Dispatchers route lower-priority trains into these tracks so that opposing or faster traffic can pass safely on the main route. Once the conflicting movement clears, the waiting train pulls back out to continue its run.
Heard on the job
Dispatcher wants us in the hole at milepost 42 so the hotshot can get by.
Insider tip
You will almost always hear this in the phrase 'in the hole.'
Also heard as
- passing siding
- passing loop
Related terms
In the hole
In the siding, waiting for another train to pass on the main line.
Meet
An arranged passing of two trains on a single-track line.
Siding
A track alongside the main line, connected at both ends, where trains meet or let others pass.
Main line
The principal track or tracks of a railroad between terminals, where trains need authority to run.