I just got my first tripod, and this is my first attempt at long exposures. I was pretty happy with the result. Though I will confess to feeling a bit nervous standing practically in the street as the light is beginning to wane and the cars are racing by!
I really like this, the comparison between the moving and non-moving cars. It might have been a little better if the white car furthest to the right was not there, or if it were a darker, less flashy make. That is not your fault though, since they are not your cars [i think]. Excellent shot, though.