I am building a simple stunt racing/freestyle game for mobile/pc and could use some help with the track texture.

I have these 50 characters: http://i.imgur.com/80QNTmv.jpg
You can prototype the game here: http://www.wordoftheeday.com/tirefire (Unity Web)

It will be free-to-play with offline multiplayer, meaning you battle against recorded runs from other players, with leaderboards of course.

The art style should fit well with the character colors. It should be a repeatable texture. I plan on altering the color of the texture from green to red based on distance to the end of the map using shaders, but for freestyle maps, a neutral color tone (does not fit between the green/red gradient) texture will be needed.

The repeating aspect should be noticable across the UP/DOWN axis, for the illusion of faster speed as you travel down the track.

If anyone could help with texture ideas, it would be appreciated.

Thanks,