Catch points are special areas on train tracks where trains can be safely stopped if they are going too fast or if something goes wrong. Imagine you and your friends are playing tag, but the person who is "it" is running too fast and might bump into something. To make sure no one gets hurt, your parents might tell you all to tag the person at a special safe spot that's far away from anything dangerous, like a tree or a fence.
In the same way, catch points are places on train tracks where trains can be slowed down or stopped if there's a problem. They are usually located at the end of a slope or on a curve, where trains are more likely to go too fast. Catch points have a special design that uses a slope and special barriers to safely stop a train. Think of it like a big, padded pillow that the train can crash into without hurting anyone on board.
Catch points are important for keeping everyone on and near the train safe. Just like your parents tell you to watch out for other people when you're playing tag, train companies have to make sure their trains are being careful near people and buildings. So, catch points are one way to keep everyone safe and make sure the trains don't go too fast in dangerous areas.