City skyline default region size is what? 6×6 km i believe. Have fun having a realistic sized airport on such a small region.
I know that making a 100% real sized airport would be hard to a CB game, but making them too much babysized is just as bad, the devs should increase at a minimum of 6x the airport size and add one more road to it. Take a look to some modded SC4 airports, they take a good part of the 4x4 map and some of them takes more than that, but they're realistical enough to satisfy the eyecand aspect of the game.