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Historical evidence has shown that incidents due to hazardous materials (HazMat) releases during transportation can lead to severe consequences. The public and some agencies such as the Department of Transportation (DOT) show an increasing concern with the hazard associated with HazMat transportation. Many hazards may be identified and controlled or eliminated through use of risk analysis. Transportation Risk Analysis (TRA) is a powerful tool in HazMat transportation decision support system. It is helpful in choosing among alternate routes by providing information on risks associated with each route, and in selecting appropriate risk reduction alternatives by demonstrating the effectiveness of various alternatives. Some methodologies have been developed to assess the transportation risk; however, most of those proposed methodologies are hard to employ directly by decision or policy makers. One major barrier is the lack of the match between available data/database analysis and the numerical methodologies for TRA. In this work methodologies to assess the transportation risk are developed based on the availability of data or databases. The match between the availability of data/databases and numerical TRA methodologies is pursued. Each risk component, including frequency, release scenario, and consequence, is assessed based on the available data/databases. The risk is measured by numerical algorithms step by step in the transportation network. Based on the TRA results, decisions on HazMat transportation could be made appropriately and reasonably. The combination of recent interest in expanding or building new facilities to receive liquefied natural gas (LNG) carriers, along with increased awareness and concern about potential terrorist action, has raised questions about the potential consequences of incidents involving LNG transportation. One of those consequences, rapid phase transition (RPT), is studied in this dissertation. The incidents and experiments of LNG-water RPT and theoretical analysis about RPT mechanism are reviewed. Some other consequences, like pool spread and vapor cloud dispersion, are analyzed by Federal Energy Regulatory Commission (FERC) model.

BACKGROUND: Active transportation, such as using a bicycle to get one from one place to another, has definite benefits over driving or some other form of travel that requires less exertion; the most obvious of these is that it helps a person meet the daily recommendations for physical activity. College campuses tend to have higher rates of bicycle-commuters than non-campus environments, although Georgia State University faces unique barriers to bicycling due to its downtown location. In 2009, a cross-sectional study was conducted to assess bicycling attitudes, knowledge, and behaviors. In the two years that followed, a faculty-student collaborative known as GSU Bikes implemented efforts to try to increase bicycling on campus. Campus bicycle count data between the two years showed positive increases. In 2011, the study was repeated to examine if bicycling attitudes, knowledge, and behavior had changed since 2009. METHODS: 211 Georgia State University undergraduate and graduate students were surveyed in Fall 2011. The data they provided were then analyzed and compared to the 2009 bicycle data using independent-samples t­-tests and a chi-square analysis to identify significant differences between the two data sets. RESULTS: Few significant differences between the two sets of data were identified. Participants in 2011 had significantly higher agreement that they could locate information regarding bicycle safety and repairs, as well as reported a significantly greater likelihood of bicycling to campus if educational programs to, from, and around the GSU campus were implemented. Written feedback suggested that fear of collisions was still a major barrier; many students suggested a campus bicycle-share program and more information disseminated to students about bicycling to campus. DISCUSSION: The results from this study demonstrate that efforts aimed at encouraging students to bicycle to campus, between the 2009 and 2011 data collections, may not have been as effective as they were intended. Bicycle promotion that reaches a greater number of Georgia State University students is suggested. Because of the method of data sampling in this study, the data analyzed may not be truly representative of the Georgia State University population. In the future, an improved survey that is disseminated electronically may result in a larger sample size, increasing statistical validity and ability to generalize findings.

As a result of the changing needs of society since the early 20th century, approaches to transportation planning have been continually shifting from highway-focused to multimodal, an approach which takes multiple modes of transportation into consideration. This evolution has been reflected in federal transportation legislation and continues to have many implications for transportation agencies, especially state departments of transportation (DOTs). The objective of this thesis is to analyze what state DOTs have done in order to adapt to the shift. More specifically, the project focuses on the organizational and funding structures of state DOTs. First, an organizational structure analysis of all 50 state DOTs was carried out. This analysis looked at how state DOTs incorporate multiple modes of transportation into their organizational structure. Secondly, the results of a statewide multimodal planning survey, to which 35 states responded, were analyzed. The survey gauged to what extent the representative from a given state DOT thought that their agency was conducting multimodal transportation planning. It also analyzed state DOT modal responsibilities, funding options, and characteristics that influence multimodal transportation planning. Lastly, case studies were carried out for six state transportation agencies: Florida DOT, North Carolina DOT, Oregon DOT, Virginia's Transportation Secretariat, Maryland DOT, and Massachusetts DOT. These case studies focused on organizational structure, funding, and multimodal efforts. Findings from the three different aspects of this thesis support the notion that highway is still the dominant mode in statewide transportation planning in most state DOTs. However, this research also supports the idea that this situation is changing, though more rapidly in some states than in others. Though it is not evident that one type of organizational structure is better than another, states have used the reorganization of these structures as a method for adapting to multimodal transportation planning. Overall, state DOTs tend to incorporate multiple modes of transportation into their organizational structure through multimodal divisions, separate modal divisions, or a combination of both. In addition to the organizational structures, some states have also restructured their funding mechanisms in order to make funds more flexible across all modes of transportation so that they may be able to better accommodate multimodal transportation planning. Those state DOTs with transportation trust funds and separate modal programs have generally shown more initiative in embracing a more multimodal approach to transportation planning. Besides organizational and funding structures, leadership, organizational culture, and institutional issues have been recognized as factors that influence the extent of multimodal planning.

Historical evidence has shown that incidents due to hazardous materials (HazMat) releases during transportation can lead to severe consequences. The public and some agencies such as the Department of Transportation (DOT) show an increasing concern with the hazard associated with HazMat transportation. Many hazards may be identified and controlled or eliminated through use of risk analysis. Transportation Risk Analysis (TRA) is a powerful tool in HazMat transportation decision support system. It is helpful in choosing among alternate routes by providing information on risks associated with each route, and in selecting appropriate risk reduction alternatives by demonstrating the effectiveness of various alternatives. Some methodologies have been developed to assess the transportation risk; however, most of those proposed methodologies are hard to employ directly by decision or policy makers. One major barrier is the lack of the match between available data/database analysis and the numerical methodologies for TRA. In this work methodologies to assess the transportation risk are developed based on the availability of data or databases. The match between the availability of data/databases and numerical TRA methodologies is pursued. Each risk component, including frequency, release scenario, and consequence, is assessed based on the available data/databases. The risk is measured by numerical algorithms step by step in the transportation network. Based on the TRA results, decisions on HazMat transportation could be made appropriately and reasonably. The combination of recent interest in expanding or building new facilities to receive liquefied natural gas (LNG) carriers, along with increased awareness and concern about potential terrorist action, has raised questions about the potential consequences of incidents involving LNG transportation. One of those consequences, rapid phase transition (RPT), is studied in this dissertation. The incidents and experiments of LNG-water RPT and theoretical analysis about RPT mechanism are reviewed. Some other consequences, like pool spread and vapor cloud dispersion, are analyzed by Federal Energy Regulatory Commission (FERC) model.

Thesis (M.S. in civil engineering)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 15, 2010). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. [9-10]).

Thesis (doctoral)--Universität Potsdam, 2000. / One CD-ROM in pocket attached to inside back cover. Includes bibliographical references (p. 221-234).

Thesis (M.A.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves [68-72]).

Thesis (M. Sc.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 134-137).

Thesis (Ph. D.)--Ohio State University, 2003. / Title from first page of PDF file. Document formatted into pages; contains xvi, 141 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Alan T. Murray, Dept. of Geography. Includes bibliographical references (p. 124-141).