In fact, the Sahara railway is a completely feasible project, at least, Ernst is very clear in his heart. After all, in the past life, the railway in Egypt and Sultanate was continuous, and in this timeline, East Africa has already extended the railway to Jezira City. So as long as Egypt and the United Kingdom are dealt with, there is no obstacle to completing this railway.
Connecting to the Mediterranean through Egypt is the easiest route, thanks entirely to the existence of the Nile River. If other regions are chosen, for example, construction in Libya, the difficulty and economic benefits would deter East Africa.
The distance is not only long, but the climatic conditions are harsher, and there is no densely populated area along the Nile River to recover costs.
Of course, if mineral resources are involved, it's a different story. This is not without precedent; in a previous life, Mauritania built a railway deep into the Sahara Desert to develop its iron ore resources.
