I think that looks a bit unreal. Having two trailers above each other. Don't know how that can be secured and if ever a truck could be seen like that. 🤔
It actually is a method new or even overage trailers are transported from a to b. Securing such a load is simply done with tension straps, but to limit my work a bit (and also to limit the tris somewhat) I'm leaving all straps and chains out.