Bruton Smith began building SMI in the 1950s when he worked as a race promoter and eventually built Charlotte Motor Speedway in 1959 .
Speedway Motorsports did n't officially incorporate until 1994 .
Bruton Smith began building Speedway Motorsports in the 1950s when he worked as a race promoter and eventually built Charlotte Motor Speedway in 1959 .
Speedway Motorsports did n't officially incorporate until 1994 .