Complex sentence: Although many tracks are referred to as superspeedways, the only superspeedways in the world are Talledega and Daytona, all other tracks are speedways, road courses or short tracks.
Split into simpler sentences: Although many tracks are referred to as superspeedways, the only superspeedways in the world are the Talladega Superspeedway and the Daytona International Speedway. All other tracks are speedways, road courses or short tracks.