Dover Downs International Speedway (now known as Dover International Speedway), located in Delaware, United States is exactly one mile long and constructed in an oval shape. It is neither a superspeedway nor a short track. Unlike most of the circuits that are part of the National Associations for Stock Car Auto Racing and NASCAR that are made of asphalt, this speedway is made of concrete. It has been hosting NASCAR events since 1969. Initially, the surface was made of asphalt but in 1995, it was rebuilt with concrete. The nickname of the speedway "Monster Mile" is given by Denis McGlynn (owner of the Melvin L. Joseph Construction Company, Inc. that rebuilt the surface of the circuit) as the concrete surface is much harder than asphalt surface.
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