hey, thanks for the comment. I mean, this is the context I have in mind.

In such remote areas as central highlands of afghanistan, construction sites aren't really sealed off from the public. It's not really feasible. FURTHERMORE, a highway under construction, isn't going to be impossible-to-use until after it's fully paved, pavement lines drawn, signs installed. 

If the goal is to construct a paved standard up-to-standard highway, when vehicles come and clear mountains, build concrete culverts, put gravel on and flatten portions of the road, this wide smooth gravel road, will itself serve as a regional highway, while simultaneously work on paving and constructing tunnels and bigger bridges and so on continue.

A similar situation exists in Wakhan corridor. It's been on the news for the past year or two, different waves of news. contradictory news perhaps to a person who lives in an area with a developped road network and a solid cultura of management of construction plans. But in Afghanistan, those practices aren't just feasible. 