Tennessee Pass 2 signals question

[buenaventura]

I downloaded the Tennessee Pass 2 route from this site and it is quickly becoming a favorite. I have one question about the signalling. I noticed that oftentimes when the HUD indicates a signal is approaching the signal does not actually appear in the game. I took the attached screenshot as an example. Unfortunately you can't see the HUD in the screenshot, but it indicates that there is a signal before you enter the Pando Tunnel - but as you can see from the pic, there is no signal there in the game. Is there a chance I am missing signal objects or is the HUD simply "wrong"?

[Chacal]

The signals are probably buried underground.
It is a common trick by route builders.
That way, you have a route that looks like dark territory but can still support scenarios with AI.

[buenaventura]

I see - thanks for the tip!