I'm trying to create a racing game in Alice. I have the streets and the car but I can't find a way to make the car stop when it goes off the road. The only way I can think of is have "While car is within 5 meters of road, road1, road2, road3, turn, road 4.... Do car move forward...." But even that wont work because it measures 5 meters from the center of the road. So I would have to put in a bunch of invisible objects on the road and say "while car is within 5 meters of object, object2, object3....." that would crash the computer though wouldn't it? Is there any other way to do this?