What do you mean by radio? there will be background music in a later version, i intent to continue on the game.
A radio system with different songs might be an issue as it would involve the acquisition of songs and music packs that are not in my budget atm... hm, maybe some cruising music might be possible ;)
I intent to add upgrades that would include higher speeds and maybe even setting up planters yourself as well as more buildable filling stations...
some big plans ahead... ;P