What term describes all forms of movement along a highway including vehicles and pedestrians?

The term that encompasses all forms of movement along a highway, including vehicles and pedestrians, is "traffic." Traffic refers to the flow of all types of vehicles, bicycles, and foot traffic that utilize the roadway. This includes not only motor vehicles but also pedestrians, cyclists, and any other entity that moves along or across a highway.

In contrast, "pedestrian" specifically refers to individuals who are walking, thus not capturing the full spectrum of movement that traffic entails. "Conveyance" generally describes the act of transporting something from one location to another but does not directly address the movement of people or vehicles in a transport context. "Transport," while related to the movement of goods and people, does not specifically imply the diverse forms of movement present on highways. Therefore, traffic is the most comprehensive term that effectively describes the interaction of all types of movement along roadways.