My submission for the weekly theme of long exposure. I just found out about these in the forum so I'll start trying to pay attention there. If you're not familiar, check them out for ideas of challenges to photograph each week along with examples and tips for making the shots.
It took me a few tries to time the shutter with the traffic, but this is only one exposure - 15 seconds at f8 and 320 iso.
The car entering the other end of the tunnel at just the right moment to add that white light at the far end was just pure luck.