Difference between revisions of "Presignal Basics"
From #openttdcoop wiki
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==Part 2: The Station Problem== | ==Part 2: The Station Problem== | ||
− | Stations without any presignals have a big problem: just have a look on the Image to the below.[[Image:Terminal1.png|270px|center|thumb|Problem at stations without Presignals]] | + | Stations without any presignals have a big problem: just have a look on the Image to the below. Signal A should be red...[[Image:Terminal1.png|270px|center|thumb|Problem at stations without Presignals]] |
If you let one more train to enter into the station, it will block the exit, because A signal is green. This problem is solvable with presignals: Just turn A into Entry presignal, and turn A and B signals to exit signals. [[Image:Terminal2.png|276px|center|thumb|Station with Presignals]] How does it work? If Exit Presignals B, C are both red, then Entry Presignal A is red too. Then a third train cant pass trough Signal A. | If you let one more train to enter into the station, it will block the exit, because A signal is green. This problem is solvable with presignals: Just turn A into Entry presignal, and turn A and B signals to exit signals. [[Image:Terminal2.png|276px|center|thumb|Station with Presignals]] How does it work? If Exit Presignals B, C are both red, then Entry Presignal A is red too. Then a third train cant pass trough Signal A. | ||
Revision as of 12:00, 2 January 2006
Contents
Presignal Basics
The Presignal Basics is explained here: how they work, how they behave, and how does work a terminal station, and whats the use of the combo presignal.
Part 1: Identify the signals
There are five type of signals in OTTD. If you click on a normal signal with CTRL is held, these signals will appear:
Normal Signal: It doens`t have any special alibity, it turns to red if the next signal block is blocked by any train.
Entry Presignal: It works like a normal signal, plus it turns to red if all exit presignals, or combo presignals are red after it.
Exit Presignal: It works same as normal signal, but it signs for the entry, or combo signals, if self is red.
Combo Presignal: It have Entry and Exit presignal alibities both: It turns to red if all Exit/Combo are red after it, and it signs for the Entry/Combo Presignals, if the self is red.
PBS Signal: Not a Presignal, it enables more trains in one signal block, since PBS means Path Based Signaling. This type of signal isnt explained here.