What does a blue road sign generally indicate?

A blue road sign is typically used to convey information related to services available to drivers, such as rest areas, hospitals, gas stations, and lodging. This color is standardized to help drivers quickly locate essential services they may need while on the road.

For example, a blue sign might indicate that a rest area is located ahead, allowing drivers to plan stops accordingly. This is crucial for ensuring that drivers have access to necessary amenities, especially during long trips or in remote areas. Blue signs play an important role in enhancing safety and convenience on the road by making essential service information readily available.