Which of the following is not a major contributor to traffic congestion?

Pedestrians are typically not considered a major contributor to traffic congestion in the same way that other factors such as construction, accidents, and weather conditions are. Traffic congestion is primarily caused by situations that disrupt the flow of vehicular traffic.

Construction can lead to lane closures, detours, and reduced road capacity, all of which directly impede the movement of vehicles, resulting in significant congestion. Similarly, accidents cause immediate obstruction on roadways that can halt traffic flow, leading to delays and backups. Weather conditions, such as rain, snow, or fog, also affect driving conditions, often causing drivers to slow down for safety, which can lead to increased traffic density.

While pedestrians do influence traffic by crossing streets or waiting at intersections, their impact is generally localized and does not compare to the broad, systemic effects that construction, accidents, and adverse weather have on overall traffic flow. Therefore, pedestrians are not considered a major contributor to the type of congestion experienced on roadways.