Cab signalling

Okay, so when you're riding on a train, there's something called "cab signalling" that's like the conductor telling the driver when he can and can't go. It's like when your mom or dad tells you when it's okay to cross the street – you have to wait until they say it's safe.

Cab signalling works by sending messages to a display in the train cab, telling the driver whether to speed up, slow down, or stop completely. It's like a secret code that only the driver knows how to read.

This helps keep everyone safe, because trains have to follow something called a "block system" – they can only go in certain sections of track, and they have to wait until the section ahead of them is clear before they can move forward. Cab signalling also helps prevent train crashes by making sure that the driver knows what's going on ahead of them.

So, when you're on a train and you see the driver looking at a screen in the front of the cab, they're probably reading the messages from the cab signalling system. Remember, it's like your parents telling you when it's safe to cross the street – the train driver has to wait until the signals tell them it's okay to go!