Whistle Posts

[CSXfoamer1997]

I know that W tells the engineer to use the horn, and W with a Red Slash means a Quiet Zone, but what does W over X mean?

 

[CCC1007]

Multiple crossings in close proximity?

Might be prudent to know which railroad.

 

[SarahZ]

We have W over MX in my neighborhood. It means "whistle / multiple crossings".

 

[Acela150]

We have W over MX in my neighborhood. It means "whistle / multiple crossings".

You win!