[STM32F030R8]

Noise barriers aren’t a ‘US’ thing. It would be up to the local state or county or city to build them so your results may vary. If you catch yourself saying ‘the US does this or that’ then reconsider the question bc the US doesn’t ‘do’ anything one way or another. It’s a collection of 50 states and thousands of localities.

[mcv]

That's why I said "if". I have no idea what the US does or doesn't do, I trust the people who post here to inform me about that.