For a first attempt these look great. My favourite would be #3, although I'd try to make the black triangle on the top right corner disappear (maybe cloning some of the bricks?).
The lens seems to be super sharp. What are you using?
Very good ones for a first attempt!
Boy - to think it took me DECADES of taking photos until I finally ventured into nighttime photography!!!
I like the first one with the stationary cars as opposed to the moving ones (only light trails). You can even see who had set the indicator to change the lanes.
These were taken with a D80/ 70-300 Nikkor from a hotel room window so I had almost no room to move around and I was surprised that shooting via a glass would not notice any form of reflection.