People, vehicles, and roadways are all part of which system?

The correct answer is the Highway Transportation System. This system encompasses all the elements involved in transportation on roadways, which includes people (drivers, pedestrians, cyclists), vehicles (cars, trucks, buses), and roadways (highways, streets, bridges). Understanding this system is crucial for safe and efficient travel, as it highlights the interconnectedness of various components. Each element plays a vital role; for instance, vehicles require roadways for movement, and people must navigate these roadways safely to avoid accidents. The Highway Transportation System is designed to facilitate transportation while ensuring safety and efficiency for all users.