As far as I can tell, it's sort of a medley of various bits and pieces from different tracks, strung together in an original melody. The most obvious part is the opening from the Chicago theme at the very beginning, but I've also clearly recognized bits from the Crash Site and Crash Site X themes.
Personally, I really like this remix, even if it isn't clearly recognizable as a remix of a specific track. It still sounds like something you'd hear in the game.