What's this thing called?

I'm hoping that some kind forum member will take a moment to tell me what to call this one-legged creature. I know it's some kind of signal bridge, but would like a more precise name for it.

Thanks!

Thanks!
https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=29&t=7737
Hack wrote:Specifically a cantilever signal gantry.
johnmckenzie wrote:Yes, this terminology is good for europe too