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Crash analysis of work zone lane closures with left-hand merge and downstream lane shift.

机译:通过左手合并和下游车道移位对工作区车道关闭进行崩溃分析。

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摘要

The Arkansas State Highway and Transportation Department (AHTD) began the Interstate Rehabilitation Program (IRP) in the spring of 2000 that ultimately rebuilt approximately 380 miles, or 60% of Arkansas' 655-mile Interstate system. While these projects were underway, a new lane closure method, the "Iowa weave," or lane closure with a left-hand merge and lane shift, was introduced to AHTD to effectively save time ensuring that these IRP projects were completed on schedule.;Contractors on the projects used the Iowa weave at least 50% of the time for each of the projects. The settings between the Iowa weave and the conventional right-lane closure were rotated on a periodic basis depending on the work to be completed on each side of the lane. Construction officials in AHTD agreed that the use of the Iowa weave helped them to complete the rehabilitation program on time and improved traffic safety, as no major concerns were noted due to this new technique. However, the crash analysis of this weaving pattern as opposed to the conventional right-lane closure has not been assessed to determine which lane closure strategy has an advantage on the basis of actual crash experience.;This research examined the work zone crashes in both of the lane closure settings by assessing them with a set of independent variables that have been known to be the factors that influence work zone crashes. In order to properly assess the comparison between the two lane closure strategies, the following primary research objectives were pursued: (1) Examination of crash experience results from the two traffic control methods, and (2) Reexamination of the advantages and disadvantages of the Iowa weave method as compared to the conventional right-lane closure. This study analyzed the crash data between January 1, 2000 and December 31, 2005 on the characteristics of lane closure strategies in Arkansas. The findings of the analyses were organized by: (1) Raw number of crashes (Pearson chi-square and One-Way ANOVA tests); (2) Crash rates (paired t-test); and Crash severity (binary logistic regression modeling).;The analysis results of this study may be used for DOTs to reference the impressive rehabilitation work that the AHTD has completed by incorporating the use of the Iowa weave. The results of the statistical analyses showed that there was approximately a 30 percent reduction in crash rate when the Iowa weave configuration was used. Nonetheless, the final results of the logistic regression model found that the safety advantages between the Iowa weave and conventional right-lane closure in changing crash severity were not statistically significant. Traffic volume was found to be the parameter that most significantly affected crash severity in the logistic regression model. Also, the effects of lighting conditions and intersecting streets on the severity of crashes were found to be insignificant.
机译:阿肯色州公路和运输部(AHTD)于2000年春季启动了州际复兴计划(IRP),该计划最终重建了大约380英里,占阿肯色州655英里州际公路系统的60%。在这些项目进行期间,AHTD引入了一种新的车道封闭方法,即“爱荷华编织”,即具有左侧合并和车道偏移的车道封闭,以有效节省时间,以确保这些IRP项目如期完成。项目的承包商在每个项目中至少使用爱荷华州编织时间的50%。爱荷华州织法和常规右车道闭合之间的设置根据车道两侧要完成的工作定期旋转。 AHTD的施工官员同意,使用爱荷华州织法有助于他们按时完成恢复计划并改善交通安全,因为这项新技术并未引起人们的重大关注。但是,尚未评估这种织造模式与常规右车道关闭相对的碰撞分析,从而无法根据实际的碰撞经验确定哪种车道关闭策略具有优势。通过使用一组自变量评估车道关闭设置,已知这些自变量是影响工作区碰撞的因素。为了正确评估两种车道关闭策略之间的比较,追求了以下主要研究目标:(1)检查两种交通控制方法的碰撞经验结果,以及(2)重新检查爱荷华州的优缺点与传统的右车道闭合相比,采用编织法。这项研究分析了2000年1月1日至2005年12月31日之间的撞车数据,分析了阿肯色州车道关闭策略的特征。分析的结果按以下顺序组织:(1)原始碰撞次数(皮尔逊卡方检验和单向方差分析检验); (2)崩溃率(配对t检验);这项研究的分析结果可用于DOT,以参考AHTD通过结合使用爱荷华州织法而完成的令人印象深刻的康复工作。统计分析的结果表明,使用爱荷华州编织配置时,崩溃率降低了大约30%。尽管如此,逻辑回归模型的最终结果发现,爱荷华州织法和常规右车道关闭之间在改变碰撞严重性方面的安全优势在统计学上并不显着。在逻辑回归模型中,发现交通量是最严重影响碰撞严重性的参数。而且,发现照明条件和相交的街道对撞车的严重程度的影响微不足道。

著录项

  • 作者

    See, Chen Fei.;

  • 作者单位

    University of Kansas.;

  • 授予单位 University of Kansas.;
  • 学科 Engineering Civil.;Transportation.
  • 学位 M.S.
  • 年度 2008
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;综合运输;
  • 关键词

  • 入库时间 2022-08-17 11:39:14

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