What is shown to be a serious traffic hazard according to studies?

Slow drivers are shown to be a serious traffic hazard according to studies because they can disrupt the flow of traffic and lead to dangerous situations on the road. When drivers are traveling significantly below the speed limit, it can create frustration among faster-moving vehicles, potentially leading to aggressive driving behavior, unsafe passing attempts, and increased risk of collisions. The presence of slower drivers can also contribute to bottlenecks and congestion, making it more difficult for all vehicles to maneuver safely.

In contrast, while middle-aged drivers may face certain challenges, such as typical age-related declines in peripheral vision or reaction time, studies have not consistently identified them as a significant hazard in the same manner as slow drivers. Understanding the impact of speed variance on traffic safety can help inform better driving practices and improve overall road safety for everyone.