There are six race courses in GTR '98. Each race course is in a different global location. GTR employs track mathematics to create 36 tracks. Each race course changes as the difficulty level increases. Barriers appear and disappear.
Race courses reverse.
Bridges turn into jumps. Alternate routes appear and shortcuts appear. The weather changes. It does feel as though you are racing on a different track on each level. The only connecting factor is the location of the track itself.