What type of traffic condition may be considered hazardous?

Unusual traffic patterns can be considered hazardous because they often indicate unexpected changes in the normal flow of traffic, which can create confusion and increase the risk of accidents. Drivers may not be prepared for these alterations, leading to abrupt maneuvers, sudden stops, or misjudgments in speed and spacing. For example, construction work, accidents, or events may lead to detours or lane closures, creating situations where drivers may not know what to expect. In contrast, a consistent flow of vehicles tends to indicate a predictable and stable driving environment, while route familiarity generally helps drivers anticipate traffic conditions and scheduled traffic lights are designed to regulate the flow and improve safety. Therefore, unusual traffic patterns significantly elevate the risk level, making them a primary concern for drivers.