tie downs
Speaking as a professional new car hauler, crosstieing will get you in trouble if 1 of the chains/straps get loose or breaks.
Then the other strap will pull the car to one side which will lose the tension on that strap and the whole end of the car will be loose.
When you tie it down, make sure the straps are almost straight with the car. That way if 1 comes loose, the car can only move sideways just a small bit before the other chain will swing around and tighten up.
I have been towing/hauling cars since 1970 so I do speak from experience.
I can post some pictures tomorrow of how we do it and also the results of not doing it correctly.
My trailer