The Terramax is a big truck that can drive all by itself, without a person sitting in the driver's seat! It uses something called "artificial intelligence" to make decisions about where to go, how to avoid objects, and how to stay safe on the road.
This truck is so big and heavy that it's often used for hauling things like construction materials, food, and other important stuff. And because it doesn't need a driver, it can drive for a really long time without stopping!
The Terramax has lots of special sensors and cameras all over it that help it "see" the world around it. It can use this information to make decisions, like when to stop at a red light, how to avoid hitting a person or another vehicle, and where to turn.
It's kind of like having a robot truck that can drive you around without you having to steer or press any pedals! The makers of the Terramax hope that it can be used to make shipping and transportation safer and more efficient in the future.