I only use AM radio to hear traffic alerts, which in my area are all on AM. https://en.wikipedia.org/wiki/Travelers%27_information_station https://en.wikipedia

I only use AM radio to hear traffic alerts, which in my area are all on AM. https://en.wikipedia.org/wiki/Travelers%27_information_station https://en.wikipedia.org/wiki/Travelers%27_information_stati... There is a similar license for low power FM, but has slightly different licensing requirements that makes FM less suitable. But even if those requirements were waived, I suspect that new cars without AM radio will be in the road well before state DOTs procure FM equipment and cut over.