The Cairo to Cape Town Highway

https://en.wikipedia.org/wiki/Cairo-Cape_Town_Highway#History

https://en.wikipedia.org/wiki/Giza

https://en.wikipedia.org/wiki/Giza#Ancient_era

https://en.wikipedia.org/wiki/Cairo#Transport

https://en.wikipedia.org/wiki/Cairo_Metro#Network

 https://en.wikipedia.org/wiki/Cairo#History

Eventually, the Cairo-Cape_Town_Highway might become a full length freeway or expressway. 

https://www.carwow.co.uk/blog/hydrogen-vs-electric-cars There are some ecological extremists that would like to go back to horse & waggons.

https://climate.mit.edu/ask-mit/why-have-electric-vehicles-won-out-over-hydrogen-cars-so-far

https://www.greenbiz.com/article/battle-over-electric-vehicles-could-hydrogen-win Fortunatly, most people don't want to go back to the donkey & camel days, because there is fuel efficient technology.

https://www.cummins.com/news/2022/01/27/hydrogen-internal-combustion-engines-and-hydrogen-fuel-cells While bikes, skateboards & walking are all great, a lot of people need to have a personal motorized vehicle.

https://en.wikipedia.org/wiki/Cape_Town#Road

https://en.wikipedia.org/wiki/Trans-African_Highway_network

https://en.wikipedia.org/wiki/N1_(South_Africa)#Trans-African_Highway_Network

Ideally, any major land transportation corridor should be multimodal. IE, trains, bus-lanes & bikes. Even for sparsely populated countries like Australia & Canada. 

https://en.wikipedia.org/wiki/Trans-Canada_Highway#Main_route

https://en.wikipedia.org/wiki/Highways_in_Australia#Federally_funded_highways