The 'official' Top Gear test track is a Lotus-designed one at their airstrip, the one they tested the Veyron on was Volkswagen's test track (one of em, anyway). Two seperate tracks, very far apart. They didn't show the rest of the track on 9x02 so I don't know what it's like, but it must have corners to test for everything.
The Top Gear test track would be a neat addition, I was actually considering making a 3d model of it and then someone could convert it to Forza format or something, but I never had time...
Oh yeah, if you can be bothered, it's visible from Google Earth so in case you need to know what it looks like from a birds-eye view, you can.
http://maps.google.c...k...mp;t=k&om=1 it wud be really kool if we could race on a track where we could reach maximum speed in almost every car, so how long would it take you to make something like that?