One of the main issues is the incompatible heights of the crumple zones in different vehicles, probably more so than weight.
This effectively renders them less efficient, or even non-existant in disimilar crashes.
A standard crumple zone / safety measures height for ALL vehicles, would sort a lot of problems.
Yes, it'd be difficult to do on a full sized truck, but definitely not impossible when starting a new design.
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Strayed to the Dark Diesel Side
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