Thanks for the comments.
The exposure was 30 seconds. It was a trade off from going earlier and getting more traffic, or waiting until the light was just right and losing a bit of the traffic.
The idea of having the lines leading into a cityscape is a good one. Thanks for that spicyTuna.
FanBoy, that's one of my concerns with the location I chose. It's on a bridge and there was no opportunity to get a good angle without having the street light in the picture. In the end I tried to get it as center as possible.