Manufacturers of "quiet cars" will be required by 2020 to emit engine-like sounds while running, the Department of Transportation (DOT) ruled Monday.
The ruling for "quiet cars" — electric and hybrid vehicles that don't create the same sounds as engines powered by fossil fuels — mandates that car manufacturers install external speakers on vehicles to emit a fake car sound. Manufacturers will have until September 2020 to meet full compliance — a one-year extension from the deadline placed under the Obama administration...
...the rule announced Monday will be mandated for cars moving at speeds of up to 18.6 miles per hour.
Trump admin passes rule requiring sounds in 'quiet cars' by 2020 | TheHill