FIRST Overdrive is played on a 54 ft (16 m) by 27 ft (8 m) carpeted field, divided lengthwise by a fence median to create a track, and separate the field into Red and Blue zone. The fence is crossed by an overpass marking the red and blue finish line, and hold the game pieces: 40 in (1,1016 mm) diameter inflated balls called "Trackballs." Two three-team alliances race around the track in a counter clockwise direction while manipulating the trackballs to score points.