What does a blue box sign with a phone in the middle indicate?

A blue box sign featuring a phone symbol indicates that phone service is available in the vicinity. This signage is typically placed in areas where drivers might need to make a call, such as near highways or remote locations where service may be limited. The design of the sign, with the blue background and phone icon, is standardized and recognized by motorists as a helpful resource for accessing communication services. This is especially important for safety reasons, as it informs drivers that they can reach out for assistance if needed, which is critical in situations such as vehicle breakdowns or emergencies.

The other options represent different services or information and are signified by other distinct signs and colors, making it clear that the blue box sign is specifically designated for the availability of phone services.