Final answer:
Road users are often redirected due to construction, detours, or traffic routing changes, leading them on zigzagged paths in urban environments or altering normal traffic flow due to increased congestion.
Step-by-step explanation:
Road users are redirected out of their normal path in several situations such as when there is construction, during detours, or as a result of traffic routing changes for events. In cities like New York, walkers and drivers must navigate using roads and sidewalks that lead them on two-dimensional, zigzagged paths to reach their destinations, as direct routes are rarely feasible. Traffic congestion may be increased by various factors such as new businesses, manufacturing plants, or event traffic management, which can lead to changes in the regular traffic patterns.