The history of Kentucky Speedway is as colorful as the flags waved from its flag stand and the cars that dart around its 1.5-mile track. The path to its position on NASCAR's Sprint Cup Series schedule included more twists and turns than the roads leading to Sparta, Kentucky. Ultimately, it took Speedway Motorsports Inc. buying the track from its founders in 2008 for developer Jerry Carroll's vision to be realized 3 years later when the venue...