I'll be there on day one!
Huh? what? As in the environment? Well they're doing the same thing they did in Underground 2. You have a fully modeled city to play around in, you can tweak and mod your car internally (performance mods/tweaks) and externally (body kits/rims etc). Anyway, back to the point... I'm sure that's just a part of the city, much like how Underground 2 was set up.