This paper shows how to apply geographical information system (GIS) tools, to develop a conceptual framework for evaluating two alternative route alignments of the proposed Trans East Africa Highway Corridors. It first outlines some major ongoing GIS activities in Sub-Saharan Africa. The alternative alignments are: (1) Alexandria-Cairo-Khartoum-Kampala-Nairobi; and (2) Alexandria-Cairo-Khartoum-Addis Ababa-Nairobi. The study approach had four stages: (1) creation of an inventory database; (2) geographical analysis; (3) presentation of results; and (4) a continued effort to adapt GIS software to the decision-making progress. An evaluation matrix, shown in the paper, was used, together with GIS technology, to present a balanced and complete picture of competing concerns and interests. It attempts to identify objectively possible fatal flaws in project alternatives, and rapidly identify natural and man-made constraints that could affect decision making. Preliminary results tend to favour the alignment through Ethiopia for further consideration, mainly because of: (1) the number of people that it can serve; (2) its potential support for vast agricultural use; and (3) its ability to increase existing public infrastructure.
Abstract