the comic could be best described as the long walk but with cars (allthough i don't think the losers got killed). you had people sponsoring different drivers, and during the race they would get preyed upon by outlaw gangs. One memorable character was a cyborg driver who was permanently implanted in his car. in one panel he orders a burger which he has the waitress stick in a slot where it is all mushed up to her disgust. there was also a family of mom, dad and two kids and they were all loaded with guns as they raced. it was a pretty violent novel if i remember correctly.
it sort of had a garth ennis feel to it but i don't believe he's behind it.
the comic was translated into my language when i read it so i have no idea what the english title would be. drives me nuts not remembering more about it though, hope someone can help :)