Or a barrier that will do a lot of damage to the truck and stop it but be easy to remove when you need to unwedge the truck and pull it out? You could make some

Or a barrier that will do a lot of damage to the truck and stop it but be easy to remove when you need to unwedge the truck and pull it out? You could make something like this out of cheap steal and paint it brightly then bolt it to the higher roof ahead of the actual low roof.