I have only spent a long weekend in New York so I'm no expert but from my experience the utility vehicles (garbage trucks, buses, fire engines etc) were far lou

I have only spent a long weekend in New York so I'm no expert but from my experience the utility vehicles (garbage trucks, buses, fire engines etc) were far louder than in Europe, to the point that it would wake you up despite being in a hotel room 20 floors up. Didn't notice any issue with modified vehicles.