What kind of warning sign is referred to as a worded warning sign?

A worded warning sign is specifically designed to convey clear instructions or information to drivers using text. These signs are essential as they communicate critical messages in a straightforward manner, ensuring that all drivers can understand the potential hazards or necessary actions in a given situation. For instance, signs such as "Slippery When Wet" provide specific guidance that helps drivers anticipate road conditions and adjust their driving behavior accordingly.

In contrast, signs that use symbols only rely on pictorial representations, which may not be universally understood by all drivers, especially if they are unfamiliar with certain symbols. Signs with distances marked typically indicate how far a driver is from different locations rather than providing immediate warnings. Digital message signs can display various messages but are not categorized specifically as 'worded' warning signs since they can change and may include symbols or other information beyond simple textual instructions.