A Clue Box is a metal box that contains clues for the teams of The Amazing Race. Most clue boxes have large yellow and red Route Marker flags attached to catch the eyes of the teams. Teams commonly run toward the box, grab a clue envelope, and read the clue aloud to their teammate and the camera. Some clue boxes are attached to Intersection or Speed Bump signs. Clues found inside Clue Boxes include Detours, Roadblocks, Fast Forwards, and other Route Information. Some Clue Boxes have numbers attached for teams to take, indicating their place in a line.