So let's just dive into block signals for a moment.

Now, in order to understand what a block signal is, you need to understand what a block is, for starters.

When I was trying to understand this stuff, I was like, but what's a block?

So, like, what is a block, okay?

A block is quite simple.

It's just a segment of track, okay?

So, like, here's just a train line.

It's just a single train line with no signals.

And this entire track is then one block.

It is one segment of track.

It is one block.

Now, block signals can divide up segments of a track or blocks of a track into multiple segments or multiple blocks, okay?

So here's the same train line as before, but I've just put two block signals down in different spots, and now this train line that used to be one segment is now three segments, as you can see here.

Okay, so that's what a block is, you know, in a nutshell, basically.

Block signals will prevent a train from entering another block if there's another train occupying that block, any part of a train occupying that block.

So a really kind of like easy to understand, really easy use case here would be train stations essentially.

So it's a really good idea to put like a block signal before and after a train station.

So what that's essentially going to do is it's going to turn the train station into a block, right?

So while a train is in there unloading and loading, no other train can enter that block.

And so here's an example of that.

So you can see that there's a block signal at the entrance and it's red while there's the train in the station.

Once that train station kind of leaves, it goes green and the other train is allowed to enter the train station.

So if there is any part of a train in a block, all the block signals leading into that block will be red and disallow entry to other trains.

And when that block becomes empty, then the block signal leading into that block will turn green and entry to other trains will be allowed.

So you might be wondering what happens if you don't have block signals leading into a train station.

Well, this happens basically.

So block signals are kind of the simple, basic train signal, and should handle most cases.