Dover Speedway (also known as the "Monster Mile") is a permanent oval raceway. The circuit is unique in the fact that it is exactly one mile long and is one of the three concrete circuits in use on the NASCAR calendar. Dover was first developed in 1969, and after the 1971 season all other non NASCAR events were dropped. Ever since then the track has hosted solely NASCAR, which has proved extremely popular. In 2006 it was announced that the track would go through renovation works, and would be brought back to life. The track is of a standard oval shape, with four turns and the highest banking being 24 degrees.