Looking for Help with a Racing AI

Hi Everyone

I’m looking for help with creating a AI for a racing game, I have been following the post done by Peter L Newton and its extremely well done but I’m looking for something where the AI will aim for the Designated nodes but not run point to point rather it would pick a random area near the node each time it arrive at the node so the route will hopefully be random each time.

So any suggestion would be of great help