The Indianapolis Motor Speedway, located in Speedway, Indiana (an enclave suburb of Indianapolis) in the United States, is the home of the Indianapolis 500-Mile Race and the Brickyard 400. It has existed since 1909, and is the original Speedway, the first racing facility so named. With a permanent seating capacity for an estimated 257,325 people, it is the highest-capacity stadium-type facility in the world. Considered relatively flat by American standards, the track is a two-and-a-half-mile, nearly rectangular oval with dimensions that have remained essentially unchanged since its inception: four 1/4-mile turns, two 5/8-mile long straightaways between the fourth and first and second and third turns, and two 1/8-mile short straightaways, termed 'short chutes,' between the first and second, and third and fourth turns.
Contributions by Chr.K., Iuiu, and Doctorindy.