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→Block signals explained
<br>'''Common mistakes'''<br>
[[file:not_enough_signals.png|left|160px]]<br>
''Crossings with not enough signals'' - the whole red area is single block and can be occupied by only one train. That will make that crossing very ineffective. For it to work better, there need to be 6 more signals (marked by green rectangles)
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[[file:trains_selfblock.png|left|160px]]<br><br>As practical example of the ''Not enough signals'', train could block itself in such block. For this train to move at all, there must be more signals placed in marked rectangles.<br><br><br><br><br>'''Correct use of bi-directional signals'''<br>To prevent trains getting stuck nose-to-nose at bi-directional signals, they have to be placed very carefully. There are basically only two situations where they should be used:* Side line with single track and '''only one train''' going back and forth crossing main line (without the crossing, there wouldn't have to be any signals on such side line. But to prevent above described self-block, there must be signals on '''each segment'''. Since the track is used in both directions by one train only, these must be bi-directional signals.
[[file:Bi-directional_Crossing.png|300px]]
* '''End station''' with multiple platforms (no trains entering the station from the other end). If you send more trains than the number of platforms, there '''must be chain signal''' at the entry switch, where the next train will wait, if all platforms are occupied.
[[file:Bi-Directional_station.png|300px]]
