Thanks for your reply, and sorry for my late one.
I was not aware of the Wali inaugurating this highway, but as of last Tuesday (one day before I posted these changes), the highway was still inaccessible (at least at the junction with RN 75 near Djerma). To be more specific, bricks were laid out at the entrance of the highway on both sides of RN 75.
This may have changed since, but I'm yet to head there again to check. 

Best regards,
Mahboubi Omar