According to a developer over at the official Project Gotham 4 Racing forums, they are having problems Fitting all the data of the tracks which was unveiled at today into the game.
He writes :
"You won't see different times of day per city because this involves recreating all the textures again (one for day and one for night). Whilst this wasn't a problem for our dev team, it was a problem fitting all this data onto a single DVD."
