Which term describes the movement of vehicles, pedestrians, and other users within a transportation system?

Traffic flow is the term that accurately describes the movement of vehicles, pedestrians, and other transportation system users. It encompasses all aspects of how these various users interact within the network, including their speed, density, and behavior as they navigate through the transportation infrastructure.

This concept is crucial in traffic engineering and planning, as it helps to analyze and optimize the performance of transportation systems to ensure safety and efficiency. Understanding traffic flow allows professionals to develop better designs and implement strategies to improve the overall functionality of roadways, intersections, and pedestrian areas.

The other terms relate to aspects of transportation systems but do not specifically capture the essence of movement. For example, modal split refers to the distribution of travelers across different modes of transport, while mobility pertains to the ability to move freely and easily within a system. Transport demand focuses on the overall need or desire for travel within a given area, rather than to the movement mechanics themselves. Thus, traffic flow is the most fitting term for the described scenario.