Nice image Alex. :) I think it would look better if you only selected one colour, for example: "polis". I know that there's no rule when it comes to these kind of images, I just think it would work well for this particular one.
Interesting...police is also spelt "polis" over here. :)
I had an interesting discussion on another thread regarding selective colouring - two colours really doesn't work unless kept to one entire object. I side with Grahamnp's thought.
As for the composition, better in that you've now opened the width, but for this one I'd have done it differently - it's a lopsided balance, and there's more contrast on the left because of the wall. What I would have done would be to stand in front of the "polis" van and taken an image there with it in baing in the centre, and I'd be at hip level so that I can give the impression of a towering vehicle as well as capturing the two different textures of the pavement and road. Those do make interesting lines, and you have made use of them.
Overall though, can't really fault the composition too much bar the unavoidable post and sign. That could be cloned out given a bit of time, but I'd advise against it - the image isn't really worth the time to recover.