What type of signs provide drivers with directions to highways and rest areas?

Informational signs are specifically designed to provide drivers with helpful information regarding directions, services, and points of interest. These signs guide drivers to highways, rest areas, and other essential services. For example, signs indicating upcoming exits for highways or showing the distance to the nearest rest area fall under this category. These signs are typically rectangular and are often green or blue, making them easily recognizable.

Warning signs, on the other hand, are focused on alerting drivers to potential hazards or changes in road conditions, while regulatory signs indicate laws and regulations that must be followed. While both warning and regulatory signs are essential for safe driving, they do not serve the primary function of offering directions and information related to travel services. Thus, the correct choice is informational signs, as they specifically fulfill the role of guiding drivers about highways and rest areas.