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. Signal A should be red...[[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 B and C 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 | + | 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 B and C 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 cannot pass trough Signal A. |
==Part 3: An Effective RoRo station== | ==Part 3: An Effective RoRo station== |
Revision as of 04:49, 9 February 2009
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 does not 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 has both Entry and Exit presignal alibities: 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 is not explained here.
One-Way PBS Signal : It works like a PBS Signal, however, it prohibits passing through from the back side. This type of signal is not explained here.