From their site: Scalextric has now introduced new banked track. Better than the track sold in the 1970's, the new track replicates Indy and Nascar style race circuits. Alternatively, you can use the banked curve track to feature in any layout your imagination chooses. Think 'Brooklands'!, Think 'Indianapolis'!
C8296 and C8297 banked curves are available in Radius 2 AND Radius 3 sizes so four-lane curves are a reality!