Twice as many crashes happen at intersections with traffic control devices than without them.

The assertion that twice as many crashes occur at intersections with traffic control devices than those without is indeed supported by statistical findings in traffic safety research. Traffic control devices, such as stop signs, traffic lights, and yield signs, are designed to manage the flow of vehicles and enhance safety at intersections. While one might assume that the presence of such devices would reduce accidents by clearly signaling when to stop or proceed, the reality is that intersections with these devices often experience higher volumes of traffic.

As a result, the increased interaction between vehicles and the potential for driver confusion or misinterpretation of signals can lead to more frequent accidents. Additionally, drivers might become complacent with the presence of traffic controls, taking more risks than they would at uncontrolled intersections. This counterintuitive situation highlights the complex nature of traffic dynamics and the influence of behavioral aspects on road safety.

In summary, the data suggests that the greater number of incidents at controlled intersections reflects both the increased traffic volume and the challenges that come with interpreting traffic signals and adhering to posted rules.