What does a blue sign generally indicate?

A blue sign generally indicates services available, such as accommodations, food, gas, and other amenities for travelers. These signs help drivers find essential services when they are on the road, particularly in areas where such facilities may not be immediately visible or readily available. Blue is universally used in transportation to denote services, making it easier for drivers to navigate and make decisions regarding stops or assistance.

In contrast, the other options represent different categories of signage: traffic regulations are typically indicated by regulatory signs, often in red or white; construction zones are marked with orange signs; and road condition warnings are usually highlighted in yellow. Each color and sign type serves a specific purpose in guiding and informing drivers on the road.