Which of the following is NOT a part of the Highway Transportation System?

The Highway Transportation System (HTS) consists of three primary components: people, vehicles, and roadways. Each of these components plays a crucial role in the safe and efficient movement of traffic.

People refer to the drivers, passengers, pedestrians, cyclists, and all individuals who interact with the transportation system. Vehicles encompass all forms of transport used in the HTS, including cars, trucks, bicycles, and motorcycles. Roadways are the physical infrastructure where vehicles travel, comprising streets, highways, and other routes.

Airways, however, do not form a part of the Highway Transportation System. Instead, they relate to a separate aviation transportation system, which includes air traffic control, flight paths, and airports. This distinction is important as it emphasizes the specific focus of the HTS on ground-based transportation. Therefore, identifying airways as not being part of the Highway Transportation System highlights the unique roles different transportation systems play in the overall movement of people and goods.