I think the highway will nor be constructed towards Taza (too difficult) or to Taourirt (to far away). The best option is to contruct a direct link between Nador and Guercif following the Moulouya river at a certain distance (too close is not possible, because these grounds are too fertile... irrigated lands which are scarce in this dry region.
This option is the best one. A direct link with Taza should pass via Saka, but between Saka and Taza is very mountaineous and thus to expensive, and wouldn't serve other regions. The option via Guercif means extra traffic towards Guercif, as trafic towards Taourirt could exit highway near Mechra Hammadi. This highway can gain extra traffic if there would be a new route between Mechra Hammadi and Saidia via Berkane to make these places better to reach without detour via Nador or Oujda ...