Police cars are special vehicles that help keep us safe. They are designed to go very fast so they can reach people who need help quickly, or catch bad guys who break the law.
When you see a police car with flashing lights, it means that they are in a hurry. The bright lights help other drivers see them and make way so the police can zoom past. This way, they can get to emergencies—like someone who needs help or a place where a crime is happening—as fast as possible!
So, just remember, police cars are fast because they have an important job to do. They help everyone stay safe!