A dual-mode vehicle is like a special car that can travel on both roads and train tracks. Imagine you have a toy car that can drive on your carpet and also on your train tracks. That's how a dual-mode vehicle works, but it's much bigger and fancier.
Some places have roads that are very busy, and it can take a long time to get where you're going because of all the traffic. But sometimes there are train tracks nearby that aren't being used very often. A dual-mode vehicle can drive on the busy road, but when it gets to the train tracks, it can turn into a train and ride along the tracks to its destination.
It's like having two different types of transportation combined into one!
The way it works is that a dual-mode vehicle has special parts that can switch between wheels for driving on roads and train wheels for riding on tracks. It's like having two different sets of shoes for different kinds of activities. When the car needs to switch from road mode to train mode, it goes to a special station where it can make the transformation.
So, if you ever see a big vehicle that's driving on a road and then suddenly turns into a train, you might just be looking at a dual-mode vehicle!