be surfaced with different materials, including timber, synthetics and concrete. Shorter, newer, and Olympic quality tracks tend to be timber or synthetics; longer, older, or inexpensive tracks are concrete, macadam, or even cinder. Track markings Important cycling events are usually held on tracks which have lines laid out in a specified arrangement. Some other tracks also follow these protocols, but others have a different arrangement of lines to suit their facility and to assist riders in holding a straight line and in avoiding drifting onto the flatter section below the bankings where they risk their tyres sliding out. Between the infield (sometimes referred to as an apron) and the actual track is the blue band (called "côte d'azur") which is typically 10% of the surface. The blue band is not technically a part of the track; although it is not illegal to ride there, moving into it to shortcut another rider results in disqualification. During time trials, pursuits or other timed events, the blue band is obstructed with sponges or other objects. The blue band is a warning to cyclists that they may scrape their pedal along the infield when in a curve, which can easily result in a crash. above the blue band is the black measurement line. The inner edge of this line defines the length of the track. above the inside of the track is the outside of the 5 cm wide red sprinter's line. The zone between black and red lines is sprinter's lane, which is the optimum route around the track. A rider leading in the sprinter's lane may not be passed on the inside; other riders must pass on the longer outside route. Minimum (or half the track width) above the inside of the track is the blue stayer's line. This line serves in races behind motorbikes as a separation line. Stayers below the blue line may not be overtaken on the inside. In Madison races (named after six-day races at Madison Square Garden in New York City, New York and also known as "the American"), the team's relief rider rests above the stayer's line by riding slowly until his or her teammate comes around the track and throws him or her back into the race. The finish line is black on a wide white band and near the end of the home straight. Red lines are marked in the exact centre of each