Obviously its been done a million times before, but its one of those shots that every photographer has to complete at some point..The background isn't particularly interesting, and once you've seen a few of these the background starts to become the integral part of the shot, However you have captured the essence of speed nicely,
The car lights are great but like what was said before the background is lacking, especially since it is out of focus. Find that unique shot that no one else has and it would be stellar.