Well Im a bit new but Ill give you some suggestions.
Since you know how to move the sprites. you should draw a track and have the sides of the road appear to move my having 2 different sprites also have a few trees randomly scroll down from the top. This will simulate movement then just have your other vehicles scroll down from the top also. So your track is not actually moving but it looks like it is because trees are scrolling by as you hit the gas etc..
A bit vague but some Ideas for you. Hope it helps some.
http://rageoebel.tripod.com