Gregory A. Keoleian

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Travel patterns from survey data are combined with naturalistic drive cycles. More realistic PHEV energy modeling using these synthesized real-world drive cycles. Methodology is demonstrated for PHEVs in Michigan but applicable for other regions. Energy and emissions findings have major implications for PHEV standards and policy. a b s t r a c t Plug-in(More)
The environmental profile of goods and services that satisfy our individual and societal needs is shaped by design activities. Substantial evidence suggests that current patterns of human activity on a global scale are not following a sustainable path. Necessary changes to achieve a more sustainable system will require that environmental issues be more(More)
Concrete infrastructure represents an enormous investment of materials, energy, and capital, and results in significant environmental burdens and social costs. There is an ongoing effort to identify material alternatives to conventional concrete. Life cycle assessment ͑LCA͒ is an important tool to evaluate the environmental performance of alternative(More)
Purpose This study aims to compare the life cycle greenhouse gas (GHG) emissions of two cellulosic bioenergy pathways (i.e., bioethanol and bioelectricity) using different references and functional units. It also aims to address uncertainties associated with a comparative life cycle analysis (LCA) for the two bioenergy pathways. Methods We develop a(More)
Traditionally, the foremost concern among transportation engineers has been the safety and reliability of major infrastructure components. Until recently, sustainability has not been included in most infrastructure systems on any level. However, the engineering community, along with society as a whole, is realizing the importance of sustainability-oriented(More)
  • D V Spitzley, D E Grande, T Gruhl, G A Keoleian, J C Bean, David V Spitzley +4 others
  • 2004
Introduction In the United States, the predominant mode of personal transportation is the automobile with over 90% of all passenger miles traveled in 1997 (Davis and Diegel 2002). Similarly, total passenger miles traveled annually in the U.S. have been growing at nearly three times the rate of population over past two decades. With transportation(More)