How does a train stay on the track?

A car has a steering wheel to turn corners. But a train has no steering wheel at all — and it still follows every bend without falling off. How does it do that?

The wheels have a little lip

Look closely at a train wheel and you will see a raised edge on the inside, called a flange. It sticks out like a tiny rim around the wheel.

The wheels also have a clever shape — they are a bit wider in the middle and slope down at the sides, almost like little cones. This shape helps the wheels sit snugly on the two metal rails.

The rails do the steering

The rails are like two long fingers that guide the train. The flange keeps each wheel from sliding off sideways, so the train can only go where the rails go.

When the track curves, the rails gently push the wheels around the bend. The train simply follows — no steering wheel needed!

Why the cone shape helps

On a curve, the train leans a little. The cone-shaped wheels let the outer wheel roll on a wider part and the inner wheel on a narrower part. That keeps the train smooth and steady around corners.

Wonder fact: Steel wheels on steel rails are so slippery and smooth that one engine can pull a train as heavy as hundreds of cars with surprisingly little effort!