Re:How the BBC and ITV are fixing delays on World Cup live s...
by AnssiH on Friday July 13, 2018 @10:20PM
(#17528423)
The name of the feature is usually AF (RDS), all my car radios since 90s have supported it and all multi-transmitter FM stations here make use of it. I'm in Finland - no idea if it is less common in US.
https://en.wikipedia.org/wiki/Alternative_frequency