Finally I have finished editing the images I have taken of trafic passing the the old train station building using the same nd filter, results:

This is a crane-truck passing in front of Wellington train station, I had a hard time extracting the traffic cones in the foreground and you would probably still see reminiscence of the editing process.

- Cropped out the traffic cones, its quicker but I lost half the train station building - still a cool image though