Photoshop: Billboard Practise

I had a little play around on Photoshop with some of my original images to practise making my billboard look more realistic. I just used an image off Google for this practise- however, my actual advertisements will be on images of billboards I have taken myself. The only change I have made to one of the images whilst I was practising this is i made one of them black and white to see how this looked.

I think these images work really well on a Billboard as they do stand out and make an impact. However- the final images will ultimately depend on my final chosen brand as the final look will have to fit in with my brands overall image.