what is signal aspect diagram

[onestrangeday]

Hi signal professionals:

I am still new to the signallling industry.
I have few questions as follow

1. " what is signal aspect diagram" ?

2. is "signal aspect diagram" = "signal aspect sequence"

3. can anyone provide a copy of 'signal aspect diagram' or "signal aspect sequence", i have no idea what's looks like ?

4. how would you draw out the aspect sequence for all the signals a driver would see before reaching a red signal.



thanks


william