What do rectangular shaped signs with a blue background mean?

Rectangular shaped signs with a blue background serve to provide information to drivers. These signs typically indicate important details such as services available ahead, points of interest, or instructions that may enhance the driving experience, like directional guidance. The use of blue is standardized in traffic signage to ensure clarity and uniformity, helping drivers quickly identify the type of information being presented.

In the context of road signage, this blue background is specifically designated for informative purposes, distinguishing it from other shapes and colors that might communicate different traffic regulations or prohibitions. This clear differentiation helps in maintaining road safety and efficient navigation, allowing drivers to understand what to expect on the road ahead.