Safety Effects of Raising Speed Limits to 75 mph and Higher (2022) / Chapter Skim
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Pages 166-169
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From page 166... ...
166 CHAPTER 10. Conclusions This report documents an analysis of the safety effects of increasing speed limits to 75 mph or greater.
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From page 167... ...
167 For this Texas analysis, the before-after analysis consistently depicted an increase in rural freeway crashes following a change in the maximum speed limit from 70 to 75 mph. The statistically significant results ranged from an increase in total rural freeway crashes and rural freeway KAB crashes of 10 percent and 14 percent, respectively.
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From page 168... ...
168 observed that both Kansas and Iowa experienced a decrease in annual rural Interstate crashes following the 2011 change to the Kansas maximum speed limit. This observation suggests that there are other factors, beyond the maximum posted speed limit, that influence the number of crashes since the maximum speed limit change only occurred in one of the states.
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From page 169... ...
169 limit and the number of crashes varied. In general, the speed limit change from 70 to 75 mph in Kansas was associated with minimal influence on the number of crashes and appears to be overshadowed by other factors that influence number of crashes.
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