This partnership marks another incursion of HD Radio into the mass market -- BMW, Ford and Jaguar already offer it, with Volvo opening the HD spigot next year.
Today, there are more than 1,600 digital HD Radio stations in the U.S., more than 750 of which are offering innovative multicast (HD2/HD3) channels. Across the country, hundreds of new radio channels are now available. Available to over 83 percent of Americans, HD Radio technology dramatically increases the sound quality of AM/FM stations. HD Radio stations offer crystal-clear digital audio and scrolling text information across the radio screen. Additionally, FM stations can offer multiple channels in their single, current frequency.
source toyota.com