All signals are made from original drawings found in the Swedish national archives. This will include some versions of combined main and distant signals (pre-signals).

The game doesn't support distant signaling so this has to be simulated in various way. For this purpose the vanilla tracks are also available in lower speeds to simulate these signals' speed limitations.

Each signal can only show two states; stop and go. By selecting a suitable combo signal you get more variety and for more realism, use the lower speed tracks after the signal if it's supposed to lower the speed.

Ball signal
From: 1837
To: 1877
I'm not really sure why I included this one. I can't find the original drawing now and no evidence in history that it has been used in Sweden. I think it might have been an early "prototype", before Sweden started to develop their own signals. This type of signals moves a ball up and down a line. It's the ball's position that indicates stop (up position) or go (down position), the color was of no importance. They where usually red or white.

Disc signal
From: 1850
To: 1930
This signal was a standard signal between 1850 and 1930. The disc was rotated 90 degrees to indicate stop or go. In the beginning they where operated manually, then with lines and later upgraded with a motor.

Electric main and distant signals
From: 1921
To: -
1921 the Swedish railway started to install standardized electrical signals that have basically the same design and look today. A simple main signal had two lights for stop and go. More information could be added by adding more lamps under the main lamps, up to a total of 5 lamps. The two top lamps are always the main signal.

The additional information could be speed limitation and what to expect at the next signal. There are mainly two standard speed limits; 80 and 40 km/h. Today when a signal says GO or GO 80 it means that the max speed is 80km/h (some routes are 100km/h instead of 80km/h) unless ATC or ERTMS indicates a higher speed.

40km/h limitation is also called "proceed with caution" unless ATC or ERTMS indicates otherwise. You can simulate this by using the 40km/h tracks after such signal.

Dwarf signals
From: 1921
To: -
These signals are often found on shunt yards or near stations. There are two types; dwarf and main dwarf.
The dwarf signal is often used as a shunt signal, away from the main track, often at 40km/h. They can also show caution due to uncontrolled switches or other trains in the area where the speed usually are as low as 10 to 20 km/h (use the low speed tracks to simulate the lower speeds). The main dwarf signal combines a standard main signal and a shunt signal and can be found at sidings or shunt yards close the main track.

Waypoint signal
From: 1921
To: -
This is not a signal, but a waypoint with an indicator. The indicator shows the track's reservation status, meaning as soon the train has reserved the path, the waypoint will show white light if the track has been reserved. The waypoint will not stop a train, only show the track's current status.

There are low speed versions of the vanilla tracks included to simulate the speed limits imposed by some signals (see the descriptions below). If these low speed tracks aren't desired, they can be excluded by a setting in the mod's config file.

This mod has ID 1918065716 so the config file is found in your workshop folder:

It looks like this:

signalExipres
Set to true if all the signals in the game should expire on their to year. If you set this to false, the signals will never expire (no end year). The default value is false (vanilla game mode).

includeTracks
If you aren't interested in the low speed tracks, set this to false. No additional tracks will be added. The default option is true, all low speed tracks are included.

groupTracks
If you decide to add the low speed tracks or not, this setting can group all your tracks differently in the UI. The default option is group.all.

• group.none
  No grouping is done, all tracks ends up as a long list in the UI.
  
• group.one
  All the low speed tracks from this mod will be collected under one single category in the UI. All other tracks will be collected in a misc track category.
  
• group.all
  All tracks in the game (including vanilla and other mods) are categorized by speed. There will be one category for 10,30,40,70,80,120 and 300 Km/h. All other speeds are placed under misc tracks.