Final answer:
The traffic signs that are green or blue with white lettering are informational signs used to provide information to drivers. They help drivers navigate and make informed decisions while on the road.
Step-by-step explanation:
The traffic signs that are green or blue with white lettering are informational signs. These signs are used to provide information to drivers about directions, locations, services, or recreational areas. They help drivers navigate and make informed decisions while on the road.
An example of an informational sign is a sign that says 'Rest Area Ahead' with an arrow pointing in that direction. This sign provides information to drivers that there is a rest area on the upcoming road.
Other examples of informational signs include signs that provide information about nearby attractions, services like gas stations or hospitals, or upcoming exits or intersections.