What does a changeable message sign provide to the public?

A changeable message sign is primarily designed to deliver timely and relevant information to drivers regarding current traffic conditions and road statuses. This includes alerts about accidents, delays, constructions, and other factors affecting travel. By providing real-time updates, these signs enhance safety and help guide drivers in making informed decisions about their routes.

While it may sometimes include information about scheduled highway closures or other specific events, the predominant purpose of changeable message signs is to relay immediate road condition data. This dynamic nature specifically differentiates them from static advertisements, which lack the capability to adjust messages based on current situations.