Nope try setting the shutter speed to a lower time. Try about 13 seconds at F-11 or so and I generally use 400 for my shooting. Its all kind of a trial and error process really. I would like to see the shots of the roadway you got though because I like the empty road type shots.

I have seen people do 30 minute exposures in daylight downtown and there are no people in the shots because of the length of time it is exposed for