PhD, University of Cincinnati, 2020, Arts and Sciences: Geography
Since the middle of 20th century, the metropolitan areas in United States have transformed from monocentric to polycentric, with employments and residents decentralizing into suburb areas beyond the urban cores. The fast growth of jobs and population and the expansion of urban areas reshaped many aspects of urban structures, and brought challenges, such as traffic congestions, long commutes, and green gas emission to metropolitan areas. To explore the changes of urban structures and analyze how urban structures affected commuting, this dissertation proposed multiple methods to quantify urban structures and examined the impact of urban structures on commuting from various geographic scales: metropolitan level, local level, and individual level. At the metropolitan level, it proposed a systematic method to quantify the different levels of polycentricity for the metropolitan areas with more than 50,000 commuters from 2000 to 2010 and investigated how the changes of urban structures affected commuting by private cars and public transit. At local level, this dissertation delved into the urban structures by analyzing the relative relationship between the employment and residents, the jobs-housing balance to examine its impact on commuting from 2003 to 2015 for Cincinnati metropolitan area. It further explored jobs-housing balance from three perspectives: job or housing rich, income mismatch, and job diversity. Specifically, jobs-housing ratio, average of ratios, and entropy index were applied to represent these three perspectives. At the individual level, this research investigated the urban structure through identifying different workplace and home types by the decentralization and clustering of employment, and jobs-housing balance around individual home locations. The analysis was conducted to explore the impact of urban structure on individual commuting distance, duration, and traffic congestion when socio-demographic factors were controlled for Ohio-Kentucky-Indiana r (open full item for complete abstract)
Committee: Changjoo Kim Ph.D. (Committee Chair); Diego Cuadros Ph.D. (Committee Member); Lin Liu Ph.D. (Committee Member); Robert South Ph.D. (Committee Member); Rainer vom Hofe Ph.D. (Committee Member)
Subjects: Geography