There is but one small landmass connecting the African Mainland with Western Asia.
The African continent is determined by its surrounding seas. In the north it is separated from Europe by the Mediterranean Sea. To the northeast, it is separated from Asia by the Suez Canal and the Red Sea. On the east it is surrounded by the Indian Ocean, and the west by the Atlantic Ocean.
Africa is the hottest continent. 60% of the entire land surface consists of drylands and deserts.
Map of Trans-African Highways based on data 2000 to 2003
Overland travel in all weather is only relatively easy between East and Southern Africa.
Trans-African Highway Network » Wikipedia Reference » More than half of the network has been paved, though maintenance remains a problem. There are numerous missing links in the network where tracks are impassable after rain or hazards.
Tanzam Highway » The main link between East Africa and Southern Africa. Leads from Lusaka, Zambia through the DRC, to Dar es Salaam, Tanzania. Wikipedia Reference