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Pages 9-11

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From page 9...
... 9 Two fundamental processes were at work over the period. The first process set the baseline level of safety that influenced the number of traffic deaths each year.
From page 10...
... 10 Identification of Factors Contributing to the Decline of Traffic Fatalities in the United States from 2008 to 2012 3. The economic decline led to changes in driver behavior such that drivers may have driven more cautiously.
From page 11...
... Analytical Approach 11 incomes allow more discretionary travel. Increases in the unemployment rate, to the contrary, tend to reduce income and thus reduce travel and exposure to crashes.

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