Update: Okay, I just uploaded my progress on the physics. take a look at the triggers. I was basing it off a physics explanation from http://forums.battle.net/thread.html?topicId=24401695010&postId=243994731169&sid=5000#43
super stuck right now.
This map is going to be a part of a series. Hopefully I can get physics enabled so the cars actually jump off the ramps. Also looking to get acceleration deceleration working properly. Leave some crit's.
Updated to v4 going off the track slows you down.
Updated to v3 with Checkpoints laps and more doodads.
Updated to v2 with improved movement controls.
Working on- going off the grass makes you move slower.