Date of Award


Document Type


Degree Name

Master of Science (M.S.) in Geography




Express highways -- Oregon, Transportation -- Management, Traffic flow -- Oregon -- Portland Metropolitan Area, Urban transportation -- Oregon -- Portland




Highway interchanges provide the interface for and moderate access to the surface street system and help control congestion. Understanding the relationship between land use and transportation near highway interchanges can help to direct resources where they are most needed to maintain the integrity of the adjacent road system. This paper characterizes and ranks highway interchange areas in the Portland, OR Metropolitan Planning Organization (MPO) area with respect to changes in traffic volume and determines what factors are associated with these impacts. This study compares the transportation, population and land use patterns around 78 highways and freeway interchanges over two time periods. The main outcome measures in this analysis include interchange catchments results for changes in: average daily transportation volumes (ADT), population, developed land, and upzoning. The results show a high correlation between changes in ADT and population indicating interchange area management plans could be one effective solution to help control mobility, accessibility, safety, and preserve the functionality of highway interchanges.


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A research paper submitted in partial fulfillment of the requirements for the degree of Master of Science in Geography

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