hehe and whats this?
In "marshall" mode you can place Marshall areas and Route checkers.
Marshall areas are shown by a red circle. If a car enters one of them in single player, it will receive a 1 minute penalty. In multiplayer mode, the player will be forced to spectate.
Route checkers are shown by a green circle. Each route checker has a route index number which is shown near the top right of the screen when a route checker is selected. Cars must pass through these route checkers in the correct order, or they will receive a penalty or be forced to spectate. The route index is automatically generated in the order the route checkers are created. You can manually edit the route index by clicking on the route index button.