How can fatigue impact a driver’s performance?

Fatigue significantly impacts a driver’s performance by slowing reaction times. When a driver is tired, the brain's ability to process information and react to changing situations on the road diminishes. This means that if a driver encounters an unexpected event, such as a pedestrian crossing or a sudden change in traffic conditions, their response may be delayed. Slower reaction times can lead to dangerous situations, including accidents, because the driver may not be able to respond quickly enough to avoid a collision.

Other options suggest effects that are not true in the context of fatigue. For instance, fatigue does not enhance concentration; rather, it reduces the ability to focus. It also does not improve decision-making, as tiredness often leads to poor choices or indecisiveness. Saying that fatigue has no impact on driving undermines the critical understanding of how essential alertness and attentiveness are when operating a vehicle.