What do Service signs typically indicate?

Answer: B — Locations of service areas

Service signs are specifically designed to guide drivers to various services available along the highway, such as gas stations, rest areas, food establishments, and lodging. These signs are generally blue in color and provide essential information for travelers, helping to ensure that they can find necessary amenities during their journey. Understanding the importance of these signs can enhance a driver's experience, especially in unfamiliar areas where locating these services might otherwise be difficult. In contrast, other types of signs, such as regulatory signs, focus on laws and rules like speed limits, while road closure and hazardous condition signs warn drivers about immediate dangers or obstacles that may affect travel, but do not indicate service locations.