I had assumed it was mandated that cars in the USA have AM radios so that they could listen to TIS stations. https://en.wikipedia.org/wiki/Travelers'_informatio

I had assumed it was mandated that cars in the USA have AM radios so that they could listen to TIS stations. https://en.wikipedia.org/wiki/Travelers'_information_station https://en.wikipedia.org/wiki/Travelers'_information_station I can't find anything that enforces that mandate, though. So I guess there's nothing keeping you from shipping a car radio without AM.