I love the colors in the clouds, very dramatic. But the shot overall is a bit too dark for me and the train and rail draw my attention out of the shot because of the direction it's heading. The building to the right is a good balance to help draw you back in but that train just keeps taking me out! ;)
The colors are great, but unfortunately there's very little detail in the metro car (on my monitor anyway). Giving it more prominence wouldn't hurt the shot - your composition is great.
Very decent sunset dusk shot, the light on the buildings is so soft and pleasing to the eyes. I only wish you had shot a little earlier to get the whole front of the train into the image.