Tips

What is a presignal?
A train will cross a pre-signal only if the pre-signal and the following signal is green. That means that in the following example no train will enter the block in front of the station if there is a train on the destination plattform. Because of this no arriving train will block leaving trains.

When should I use presignals?
As example in front of big stations and big crossings.

I use them only in front of very big stations with a much traffic.


Example 1 (Head station)

Image: Head station with presignals (scaled image from the 128x128 imageset)

Notes:

• There is a crossing at the front of the station.
  
• At this crossing three signal types are used:
  - Two-Way-Signals! (in front of the station)
  - Pre-Signal (rail for arriving trains)
  - One-Way-Signal (rail for leaving trains)
  
• See "How to use stations-Tutorial" to learn more about head-stations

Example 2 (cross-station)

Image: cross-station with presignals (scaled image from the 128x128 imageset)

Notes:

• In front of the stations one-way-signals are used (because the trains are driving throught the station)
  

Alternatives to presignals (Choosesignals):

• English: Simutrans forum (external link)
  
• German: Simutrans forum (external link)