Which type of light is designed to mark extremely hazardous conditions?

Type B lights are specially designed to mark extremely hazardous conditions. These lights provide high visibility and are often used in situations where there is a greater need to alert drivers and pedestrians to potential dangers. The distinct characteristics of Type B lights, such as their flashing pattern and color, make them particularly effective in drawing attention where immediate caution is required, thereby enhancing safety in hazardous environments.

In contrast, other types of lights—such as Type A, C, and D—serve different roles and may not have the same level of visibility or functionality required for marking high-risk areas. Understanding the specific purposes of each type of light is essential when determining the appropriate signal to use in various traffic control scenarios.