These look like some valuable contributions to the theme thread "On the road" in the Photo Themes (very old theme thread started in November 2003, hence many links long gone, but resurrected by J7CK only the other day - whose photos nor avatar seem to show for me, though, and I don't know why). I might go re-establish some of the links I used to have in there, too, I still remember which photos of mine had gone in there back then... I think :scratch:
As to your photos here, I think I best like the one of the road bridge on the right. Makes you wonder why at one point in time there was demand for such a high bridge, when later a low one sufficed?