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首页> 外文期刊>Journal of Transportation Technologies >Assessing the Safety Impacts of Increased Speed Limits on Kansas Freeways
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Assessing the Safety Impacts of Increased Speed Limits on Kansas Freeways

机译：评估提高限速对堪萨斯高速公路的安全影响

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Suitable speed limit is important for providing safety for road users. Lower-than-required posted speed limits could cause the majority of drivers non-compliant and higher-than-required posted speed limits may also increase the number of crashes with related severities. The speed limit raised in Kansas from 70 mph to 75 mph on a number of freeway segments in 2011. The goal of this study is to assess the safety impacts of the freeway sections influenced by speed limit increase. Three years before and three years after speed limit increase was considered and three methods were used: 1-Empirical Bayes (EB), 2-before-and-after with comparison group, and 3-cross-sectional study. The Crash Modification Factors (CMFs) were estimated and showed 16 percent increase for total crashes according to EB method. Further, the before-and-after with comparison group method showed 27 percent increase in total crashes and 35 percent increase on fatal and injury crashes. The cross- sectional method also presented 25 percent increase on total crashes and 62 percent increase on fatal and injury crashes. It was seen that these increases were statistically significant.
机译：适当的速度限制对于为道路使用者提供安全至关重要。低于要求的发布速度限制可能会导致大多数驾驶员不合规，而高于要求的发布速度限制也可能增加具有相关严重性的崩溃次数。 2011年，堪萨斯州的许多高速公路路段限速从70 mph提高到75 mph。本研究的目的是评估限速提高对高速公路路段的安全影响。考虑提高速度限制的前三年和后三年，并使用了三种方法：1-经验贝叶斯（EB），比较组前后2个和3个横断面研究。估计了碰撞修正系数（CMF），根据EB方法，碰撞总数增加了16％。此外，比较组方法前后的总事故发生率增加了27％，致命和伤害事故增加了35％。横截面方法还表明，总碰撞事故增加了25％，致命和伤害事故增加了62％。可以看出，这些增加具有统计学意义。

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