On main roads there are plenty of these places and I have to say when I am driving on business I often wish there was something other than kebabs - which I never touch even if I am drunk but they seem to be the default fast food in most of Europe now, I guess because of the margins.
Reminds me of the joke about a motorist being stopped by the police, offered a kebab and promptly arrested for drink driving. The police apologises for the unorthodox approach but explains that his breathalyser is broken and the kebab method works just as well.
I can tell you that "Beligian Fries" places are popping up in Warsaw like crazy. And they are popular.
That was last year! This year it's all about burgers.