A controversial bill that would require all new cars to be fitted with AM radios looks set to become a law in the near future. Yesterday, Senator Edward Markey (D-Mass) revealed that the “AM Radio for Every Vehicle Act” now has the support of 60 US Senators, as well as 246 co-sponsors in the House of Representatives, making its passage an almost sure thing. Should that happen, the National Highway Traffic Safety Administration would be required to ensure that all new cars sold in the US had AM radios at no extra cost.
Range is the biggest. KMOX in St Louis was known to reach Colorado from my understanding. There are/were a lot of Cardinal fans because of it in that area before they got the Rockies. I don’t think they broadcast as strong now, not sure. FM will cut out in under 75 miles* unless you have a “good” antenna.
*Not sure the proper range.
And at night the way the signals bounce they can be heard for a thousand miles or more. Due to interference only some stations can run full power at night while most have to turn off or turn power way way down.
Occasionally it can be heard across continents even