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A prototype geographic information system for transportation (GIS-T) that was developed for a suburban county transportation agency in metropolitan Atlanta is described. The main objective in developing the prototype was to design a system to help the county agency to better manage its transportation program. An organizational assessment was conducted to determine the different types of GIS-T applications that would most benefit the agency. These applications were ranked on the basis of greatest need, and five application modules were chosen for inclusion in the prototype to address these needs. The modules were: (a) an integrated accident record system, (b) traffic engineering, (c) pavement management, (d) transportation planning and land use, and (e) transit. The key finding of this project is that GIS-T provides a strong management decision support capability for officials in this agency. In particular, the prototype provides more than just a data management capability. It also provides a means by which various types of analysis can be performed more efficiently than they were in the past.
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