Figure 8 racing
Figure 8 racing is a form of stock car racing in which automobiles race on a track that purposely intersects itself, increasing the risk of collisions. Figure 8 racing is most common and popular in the United States and Canada. Because of the risk of collisions, figure 8 racing bears some similarity to the chiefly European sport of banger racing. Track. Racing is done on a track shaped like an "8". The cars cross paths at the center of the "8", which is known as the "crossover" or the "X". Because of this layout, crashes are common . Figure 8 racing is a unique form of motorsport that requires strict attention to detail and timing to successfully navigate the crossover. In Canada, figure 8 racing often takes place as a part of demolition derby events. Two obstacles, often concrete blocks or vehicles are placed in the demolition derby ring to form a figure 8 track. History. Figure 8 track racing began right after World War II, in the late 1940s. The track may have had an overpass so that the cars did not cross each other's paths. Most historians believe that the first track where drivers crossed  paths was the 1/5 mile-long Indianapolis Speedrome. The sport received nationwide publicity when it was frequently televised on ABC's "Wide World of Sports" in the 1960s, usually from Islip Speedway in Islip, New York. Vehicle. The cars used are often stock cars, but are usually modified for lightness and safety, by removing the window glass and often adding a roll cage. A wing much like a sprint car is sometimes placed on the roof to increase downforce. The cars' bodies are typically made out of sheet metal. All manner of vehicles have been used. School buses have become  popular, especially at county fairs, because of their extended exposure for crashes. World championship. The oldest operating figure 8 track in the United States is the Indianapolis Speedrome in Indianapolis. The track has been in operation since the 1940s. It hosts the annual World Figure 8 race, which is considered the world championship event. The first three-hour endurance race was held in 1977. United States championship. The national championship in the United States is held at Riverhead Raceway in Riverhead, New York. Notable figure 8 tracks. Many of these tracks have configurations that allow for both standard oval and  figure 8 races.