GIS and remote sensing in highway route selection: case study in Ethiopia, selection of the Addis Ababa - Nazareth expressway alignment

Fekerte Arega, Muse Belew

Research output: Contribution to journalArticleAcademic

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Abstract

This .paper introduces the application of remote sensing datasets and utilization of GIS geoprocessing techniques to highway route selection. Various engineering factors as well as environmental constraints that influence the cost of construction, economic benefits, environmental compatibility and future liability of the proposed road project were considered in the route selection analysis. Among the engineering constraints are length of the road, slope/gradient of the terrain, water bodies (wetlands, rivers, streams and lakes), soil types, lithology and geologic structures (faults, lineaments and escarpments) etc, of the environmental constraints are landuse/ landcover which includes settlement areas (cities/towns/villages), distance from existing roads and railway and others constraint etc. All these factors will be considered at the time and interactively to select the best alternative. In this case study, two optimum alternate route corridors were selected between Addis Ababa and Nazareth by considering various constraints and giving them weights in accordance with their expected influence. The study has proved potentially worthy in reducing time and effort in the field. Hence the method reduces the cost of reconnaissance stage in addition the decision makers can utilize the method by having better quality of information to examine and evaluate various alternatives having different constraints cumulatively and interactively.
Original languageEnglish
Pages (from-to)17-27
JournalEACE Journal
Volume4
Issue number3
Publication statusPublished - 2007

Keywords

  • ADLIB-ART-4509
  • ESA

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