What does a variable message sign (VMS) do in work zones?

A variable message sign (VMS) plays a crucial role in work zones by providing real-time information and warnings regarding road conditions and construction activities. This dynamic communication tool helps inform drivers about potential hazards, changes in traffic patterns, and any other relevant updates that can impact their journey. The information relayed by the VMS is essential for enhancing safety and optimizing traffic flow, allowing drivers to make informed decisions as they navigate through construction areas.

The other choices do not accurately represent the primary function of a VMS. For instance, suggesting that it functions exclusively for stationary construction crews overlooks its broader application in actively communicating with drivers about ongoing situations. The idea that it serves merely as a decorative feature dismisses its functional importance in traffic management and driver awareness. Lastly, while a VMS can display emergency messages, limiting it to only that purpose undermines its versatility and critical function in providing comprehensive traffic-related information.