As much as I despise the Annoying Thing, I always thought that the music for the first part of Speed Highway (Sonic Adventure) would work combined with Crazy Frog's hit single "Axel F".
To test this out, I recorded the Speed Highway song, then added parts of Axel F to the song using Audacity. It actually matches up pretty well.
It's also very fitting. Both have basically the same tempo, and both the level and the music video for Axel F take place in a city setting (not to mention on a highway).
I only made it in an hour, and I didn't put much effort into it (about as much effort as the Frog's songs).
If you really wanna hear it (and I don't think you will), you can download the mp3 below. Until next time…that's it.