Final answer:
Green traffic signs are for directions, brown signs indicate recreational areas, and blue signs display services information.
Step-by-step explanation:
Green, brown, or blue rectangular traffic signs serve different purposes. The green signs often provide directional information or indicate permitted movements, such as directions to cities or distance information. Brown traffic signs typically point out recreational areas or scenic sites, while blue signs give information on services or facilities, like rest stops, gas stations, and restaurants.