There are 4 replies in this Thread which has previously been viewed 1,166 times. The latest Post () was by UK Man.
That's good news, but there's very little information about this in the local press, so I dug around. The road actually begins in Lujan on Ruta 7 and goes all the way to Mendoza. as you can see from this map.
It's known as Corredor C andVial Andes 7 and some has already been built.
Will this project (the highway, not the wall) be completed? I hope so.
I'm having some doubts about them completing the motorway extension on Ruta 5 despite them already having started it. Coming back from Buenos Aires last Friday it was plain sailing until we hit Mercedes where the motorway ends. The mini bus we were in then got stuck behind an old clapped out lorry which was travelling at 30mph. Took us ages to overtake it safely only to end up getting stuck behind another one for several miles.
Considering we're so close to the capital on a major route the standard of road is abysmal for this day and age. 
This is the plan anyway, and I'll be investigating on my bike.
Edit
This news from 8th August that the minister for transport visited the area of construction that day and work is still continuing, apparently.
This is the plan anyway, and I'll be investigating on my bike.
With both hands on the handlebars I hope? 
