Superspeedways are oval racetracks that are greater than two miles in length. The two most famous superspeedways are the Daytona International Speedway and the Indianapolis Motor Speedway. In 1988 after a few horrific crashes at both Daytona and Talladega NASCAR introduced the restrictor plate for each of the respected tracks. The reduced power affects not only the maximum speed reached by the cars but the time it takes them to achieve their full speed as well, which can be nearly one full lap of the track. The racing seen at superspeedways today is extremely tight; often in rows of three or four cars wide, and sometimes even 5 wide on the straightaways throughout most of the field, as the tracks are wide enough to permit such racing. Today The NASCAR Sprint Cup Series runs on 6 Superspeedway Race Tracks. Follow the links below to learn more about each Superspeedway race track.