Do you guys have "Not Solid" selected for your dynamic cart prop? That would be your #1 reason why they're getting stuck in your model. Have a look at the Badwater setup - there's no collision on the model (and you can shoot through parts of if, but this is hardly noticeable when playing).
As a general rule of thumb, you shouldn't have your cart going that close to any wall and keep a minimum clearance of 64 units to either side of the space the train brush will take up.
For these areas would you put in a noclip brush - would that stop it from happening? I keep getting stuck in a corner.
Has anyone else had this problems and can you put down how you fixed it?
As a general rule of thumb, you shouldn't have your cart going that close to any wall and keep a minimum clearance of 64 units to either side of the space the train brush will take up.