First asphalt superspeedway track

According to Official Guinness Records,

The 2.19-km (1.366-mile) Darlington International Raceway, in Darlington, South Carolina, USA was the first asphalt superspeedway in the world when it opened in 1950. The first race on the track, called the Southern 500, was won by Johnny Mantz (USA) in a Plymouth at an average speed of 122.72 km/h (76.26 mph).

For a complete list of 1950 records, please visit 1950 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• Oldest and largest publishing company owned wholly by its employees
• Longest-standing maths problem (ever)
• Most complex laser system
• First pirated High Definition download
• Most Billboard Hot 100 entries by a solo artist (female)