Table 4 Number of direct flights per week, November 2007, between different countries in Sub-Saharan Africa. Numbers below 4 have been highlighted, since they suggest that there are weekdays where the two countries cannot access each other directly. Heavily bordered rows and columns represent the three major inter-African hubs (South Africa, Kenya, and Ethiopia), and also Sierra Leone, which acts as a regional hub in West Africa.
Table 5 Average speed, in terms of miles per hour, for indirect flights between country pairs. The time for the speed calculation includes layover time, indicating that connections with a particular low speed rating have in fact extensive and long layovers. But in many cases there are direct flights from one of the hubs, as shown in the previous table.
