Okay kiddo, let's talk about smart highways! A highway is a big road where lots of cars and trucks can drive. A smart highway is a special kind of highway that has technology in it to make it safer and more efficient.
One of the things that makes a smart highway different is that it has sensors. Think of those like little ears that can hear things around them. These sensors can detect things like how fast the cars are going or if there's a traffic jam up ahead. Then the sensors can send this information to a computer that can tell drivers what's happening and how to avoid problems.
Another cool thing about smart highways is that they have lights that can change color. These lights are called "smart lighting." They can change color to warn drivers of changes in traffic patterns or weather conditions.
Smart highways can also have special lanes just for cars with more than one person in them. That's because cars with more than one person in them are called "carpool" cars, and they're better for the environment. Having these special lanes helps keep traffic moving faster.
There are lots of other ways that smart highways can make our roads safer and more efficient, but those are some of the most important things to know about. Thanks for asking such a smart question!