Signal - Advanced Approach Aspect

[boleyd]

I do not understand the meaning of Advanced Approach Aspect. Or, specifically what is an "Advanced Approach"?

 

[cascaderailroad]

I would imagine that it is a signal very distant of an interlocking home signal, sort of a warning signal color/position, that a "Final" home signal is coming up soon, and displays a color/position aspect at what speed to approach the home signal.

Some major interlockings have 3 consecutive signals, one distant, one approach, and finally the one home signal (at the turnout)

 

[blueodessey]

http://www.mikeroque.com/railroad-signals/

Now on your browser bring this up and type in on a search for advanced approach its way down in this web location and no find exactly what it says for fact I think you'll find this whole article very interesting to read I did...

 

[BN1970]

On the BNSF, the solid yellow signal is the "approach" signal to the next signal being red. A flashing yellow signal is the "advanced approach" signal telling you the next signal will be yellow.