1. Infrastructure: This encompasses the physical components of the system, such as roads, railways, airports, waterways, and their supporting structures like bridges, tunnels, and traffic signals.
2. Vehicles: These are the moving elements of the system, including cars, trains, airplanes, ships, bicycles, and even pedestrians.
3. Users: These are the people or entities that utilize the transportation system, whether they are passengers, freight carriers, or any other party moving goods or people.
These elements interact and work together to facilitate the movement of people and goods.