What system consists of people, vehicles, and roadways working together?

The Highway Transportation System is the correct answer because it encompasses the entire network involved in the movement of people and goods. This system integrates several components, including the roadways themselves, the vehicles that travel on them, and the individuals who operate those vehicles.

When we refer to the Highway Transportation System, we acknowledge that it is not just about the physical roads, but also about the interaction between drivers, passengers, pedestrians, and cyclists. This system is designed to facilitate safe and efficient travel, ensuring that traffic flows smoothly while minimizing the risk of accidents.

In contrast, the other options focus on more specific aspects. The Vehicle Control System pertains primarily to how a vehicle is managed and operated by an individual, while the Driver Safety System emphasizes strategies and measures to promote safe driving behaviors. The Traffic Management System deals specifically with the organization and regulation of traffic flow, often involving signals, signs, and law enforcement. Each of those plays a role in the larger Highway Transportation System, but they do not encompass the full scope of all interacting elements involved in transportation.