Which factor can hinder drivers' ability to see emergency vehicles?

Sun glare significantly impacts drivers' ability to see emergency vehicles, especially when the sun is low on the horizon, such as during sunrise or sunset. The bright light can obscure the visibility of lights and colors associated with emergency vehicles, making it challenging for drivers to notice them in time. This becomes a critical consideration for driver awareness and response, as emergency vehicles often operate in high-stakes situations where timely recognition can be crucial for safety and effective traffic management.

Other factors, while they do affect visibility to some extent, are not as direct in causing difficulty in seeing emergency vehicles as sun glare. For instance, weather conditions like rain or fog can reduce visibility overall but may not specifically hinder the view of emergency lights as directly as glare can. Road types and vehicle color might also play a role but do not have the same immediate and powerful effect on vision as sun glare during critical moments when emergency vehicles are present.