What behavior can block the smooth flow of traffic?

Slowing down to look at a collision scene can indeed disrupt the smooth flow of traffic. When drivers reduce their speed to view an accident or any incident on the road, it creates a ripple effect behind them. Other vehicles may need to slow down or stop as well, leading to traffic congestion. This behavior can contribute to delays and potentially increase the risk of additional accidents, as drivers behind may become distracted or then attempt to maneuver around the slower vehicles.

In contrast, driving at the speed limit, using turn signals appropriately, and stopping at traffic lights are all behaviors that promote safe and efficient traffic movement. Observing the speed limit helps maintain a consistent flow, using turn signals aids in informing other drivers of your intentions, and stopping at traffic lights is essential for obeying traffic rules and ensuring safety at intersections.