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10 participate in the survey. Sixteen were unresponsive after to the generalization of research findings, and our sample of multiple contact attempts. surveys and focus groups were not randomly selected from the full set that had ever been conducted on this topic. How- ever, because our review was successful in compiling a broad ANALYSIS OF DATA POINTS and diverse range of surveys and focus groups, the data rep- resent a good cross section of public opinion on tolling and Both qualitative and quantitative analyses of the compiled road pricing. data were conducted. Qualitative modes of data analysis were used to discern, examine, and interpret meaningful patterns A Statistical Package for the Social Sciences dataset con- or themes across the compiled data. Research questions taining 10 variables was created to conduct the quantitative included: What patterns and common themes emerged? Were analysis. These variables were project number, support or there any deviations from these patterns? If yes, were there opposition to pricing, year of poll, region of poll, whether any factors that might explain these atypical responses? Did clarifying information was provided in the poll questions, the the patterns that emerge corroborate the findings of the quan- validity of the poll or survey (based on our best assessment titative analysis or any previous analyses that have been con- of the research), the context of the poll (whether it was gen- ducted? If not, what might explain the discrepancies? eral or focused on a particular project), the sponsor of the research, the type of pricing, and the type of respondents. The The quantitative data analysis was conducted with a full analysis tables are presented as Appendix B. The data points recognition of the limitations of the dataset especially in terms (i.e., poll, survey, and set of focus groups) comprised the data of external validity, given that data points were selected using records or cases for analysis. The analysis activities included non-probability sampling methods. External validity refers both frequency distributions and cross tabulations.