[mirages]

"In Europe, side and rear underrun protection are mandated on all lorries and trailers with a gross weight of 3,500 kilograms (7,700 lb) or more"

I wonder why it's still not a thing in the US

[landemva]

In US, rear underrun has been required for longer than I knew about these things. Considering miles travelled and risk and limited funds, side underrun funds are better spent on other safety items.