United States Department of Transportation
i
A Study of Nighttime Seat Belt Use in Indiana [Traffic Safety Facts]
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2007-05-01
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Series: NHTSA BSR Traffic Safety Facts
[PDF-574.98 KB]
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Abstract:Overall belt use rates observed during the daytime and nighttime survey waves are presented in Table 2. Belt use observed during the daytime and nighttime pre-mobilization waves was very similar. During the post-mobilization waves, daytime belt use was 10.3 percentage points higher than nighttime use. The two-tailed z-tests performed on these data revealed a significant difference at the p<0.001 level. Comparison of the two daytime waves to one another also revealed a statistically significant increase in daytime belt use following the mobilization activities (p<0.001). Additionally, as mentioned earlier, the overall analysis of the pre- and post-mobilization nighttime survey waves revealed a statistically significant decrease in seat belt use during this time period.
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