Hang on, so multi tonne vehicles are designed with the rolling stock equivalent of anaerodynamic stability managed by black boxes?

I guess this is situated for latency but more likely installation and loom cost controls, close to the rear axle therefore more exposed to moving accident damage and at least to my casual reading of owner enthusiast fora unknown to educated owners and the public - rather like the Eurofighter Typhoon?

How can such designs pass DMV / MOT tests with inherent rolling instability in failure mode?

Or is there failsafe?

Edit: I should have said multi tonne vehicles intended by design to be driven fast and at limits including load limits.