Thanks for the suggestions Halijackey. Trust me, I hate 90 degree turns with a passion, but 45 degree turns simply will not fit (except for the 2 on the left of the interchange but I've already fixed those) and neither will the ground elevated transition. If I wanted to keep all the turns smooth, the interchange would have to take up a lot more space and I usually like to keep them small as I possibly can, especially becuase this is going to be the heart of a city that I plan to be the biggest in the region.