Which device is specifically designed for visibility in high-speed environments?

Type C arrow boards are specifically designed for visibility in high-speed environments due to their bright, illuminated display that provides clear directional guidance to drivers. These arrow boards are often used in work zones on highways and other high-speed roadways where quick recognition of road conditions is crucial for safety. Their design allows for better visibility during both day and night conditions, ensuring that approaching vehicles can easily interpret the intended message regarding lane changes, merges, or closed lanes.

In contrast, while traffic cones and channelizing devices serve important roles in directing traffic, they do not have the same level of visibility and instant recognition as arrow boards, especially in high-speed settings. Flaggers, although able to effectively manage traffic and communicate with drivers, also lack the visibility features that arrow boards offer, particularly at higher speeds where quick visual cues are essential for safe navigation.