Publication Abstract

'Evaluating the Design of the Streamlined GIS-based Transportation Corridors

Nobrega, R. A. A., & O\'Hara C. (2011). 'Evaluating the Design of the Streamlined GIS-based Transportation Corridors. Transportation Research Board 2011 Annual Meeting. Washington D.C.: TRB.


Context sensitive design, smart growth, and sustainability have become key factors in the planning and design of modern transportation projects. Nowadays more factors and attributes have been considered in transportation planning decision making process than in the past decades. Geographic Information Systems and Multi‐Criteria Decision Making are between the instruments used to lever the modernization of the process. However, most of the present practical efforts on corridor planning follow the traditional manual‐oriented approaches. The traditional corridor planning delivers trustworthy alternatives to be analyzed on the field regarding NEPA guidelines, thus innovations in methods and data must be adequate to the goals and policies of transportation planning. The purpose of this paper is to compare and quantify the geometric design of the highway alternatives derived from automated GIS process in relation to the final alignment of the I‐269. The analyses were performed in two steps: by distance and by the area occupied by the corridor. The results show up to 95% in similarity between the lengths of the corridors generated from automatic approach in comparison to the reference corridor. In the best case scenario we found 92% matching between the 1000‐foot right‐of‐way corridors of the innovative approach and the I‐269. Furthermore, when highway design geometric smoothing is applied to the automatic pathway, the selected alignment can be shown to almost exactly correspond to the human‐derived design. Therefore, metrics computed using linear comparative analysis by the end of the process suggests significant increasing to the design of the 300‐foot construction corridor after blend in highway design character.