I'm not sure what think, Rajan. You have way of capturing the sublime and making it look beautiful and you always seem to photograph things I, for one, would pass by as being not ideal yet, you find an engaging composition. "S" is a perfect case in point: there's beauty in simplicity.
Even more importantly, this photograph has forced me to think more deeply about the balance between people and nature. For example, what to do with all those road markers? They are so visually garish in this beautiful landscape, and for me, a visual barrier to the raw beauty of the land. The simplicity of the road itself ties the landscape together; the markers impede my enjoyment.
Rajan, I imagine you've decided to leave them in because that's the way it is and to remove them would make the image unrealistic for anyone who has travelled to Iceland - what's an Icelandic road without them?! But to remove them would add to the simplicity (if that's possible) by reducing the human details, allowing the subtleties of the land the visual space they need/deserve (as would removing the large green sign by the picnic site at the top of the "S" - to me, that picnic stop adds visual appeal, the green sign doesn't).
I have to ask myself, "Could I live with this, as is, on my wall?" Probably not. But, then again, I'm coming from a "nature first" point of view; I believe humans intrude on natural landscapes and rarely add anything of value to them. Without the distractions, I would find this photograph more intriguing - a large print or canvas would look stunning. Visually, I would be more willing to delve into the subtleties of the tones and undulations of the scene.
I realize I've painted myself into a corner that some would call "romanticized nature" where humans can intrude in some ways (simple roads, picnic sites, even footpaths, canoes, railways, docks and piers in some cases) but not in others (signs, road markers, even highways, transmission lines, etc. - the garish features of our existence) - so be it; that's the way I am. I'm not saying there isn't beauty in the garish, just not when it's combined with the subtleties of this landscape.
There is absolutely no reason the change anything about this wonderful photograph, unless, of course you also find some of the human intrusions distracting.