I like how you used all of Foundry for a race map, but the map itself looks sloppy. If you're going to try to bank a curve without interlocking, you should put the next wall of the curve underneath the previous. This way you won't be bumping into the next section, but rather dropping down on it. I also suggest that you interlock, people appreciate it and it'll make your map look nicer and play better. If you're unaware of such techniques, here's a link to the forging 101 section of our forums. Forging 101 - ForgeHub Halo Forums