What materials should traffic control devices be made from?

Traffic control devices must be made from durable, weather-resistant materials that are suitable for outdoor use to ensure their effectiveness and safety. These devices are often exposed to varying weather conditions, including rain, snow, and extreme temperatures, which can affect visibility and structural integrity. Using resilient materials helps maintain clear visibility and structural stability, allowing them to function properly even in adverse conditions.

Moreover, durable materials are crucial for longevity, reducing the need for frequent replacements or repairs, which contributes to overall safety during road work. They must also be visible to drivers and pedestrians, which is why many materials are reflective to enhance visibility during nighttime or low-light conditions—a characteristic that non-reflective materials lack. Thus, selecting option B aligns with the needs for efficiency, safety, and long-term use in work zone traffic control.