A large overhead gantry built across a multi-track right of way to hold block or interlocking signals. By placing the signals directly above the track they govern, it eliminates the confusion of trying to read lineside masts in complex yards or parallel mainlines.
Heard on the job
We caught a restricting indication on the new signal bridge just outside the terminal limits.
Also heard as
- signal gantry
Related terms
Signal gantry
A structural frame built over railway tracks to hold multiple signals.
Block signal
A fixed trackside light or semaphore that tells an engineer whether the track segment ahead is clear.
Main line
The principal track or tracks of a railroad between terminals, where trains need authority to run.