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首頁> 外文學(xué)位 >Crash analysis of work zone lane closures with left-hand merge and downstream lane shift.
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Crash analysis of work zone lane closures with left-hand merge and downstream lane shift.

機(jī)譯：通過左手合并和下游車道移位對工作區(qū)車道關(guān)閉進(jìn)行崩潰分析。

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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.
機(jī)譯：阿肯色州公路和運(yùn)輸部（AHTD）于2000年春季啟動了州際復(fù)興計劃（IRP），該計劃最終重建了大約380英里，占阿肯色州655英里州際公路系統(tǒng)的60％。在這些項(xiàng)目進(jìn)行期間，AHTD引入了一種新的車道封閉方法，即“愛荷華編織”，即具有左側(cè)合并和車道偏移的車道封閉，以有效節(jié)省時間，以確保這些IRP項(xiàng)目如期完成。項(xiàng)目的承包商在每個項(xiàng)目中至少使用愛荷華州編織時間的50％。愛荷華州織法和常規(guī)右車道閉合之間的設(shè)置根據(jù)車道兩側(cè)要完成的工作定期旋轉(zhuǎn)。 AHTD的施工官員同意，使用愛荷華州織法有助于他們按時完成恢復(fù)計劃并改善交通安全，因?yàn)檫@項(xiàng)新技術(shù)并未引起人們的重大關(guān)注。但是，尚未評估這種織造模式與常規(guī)右車道關(guān)閉相對的碰撞分析，從而無法根據(jù)實(shí)際的碰撞經(jīng)驗(yàn)確定哪種車道關(guān)閉策略具有優(yōu)勢。通過使用一組自變量評估車道關(guān)閉設(shè)置，已知這些自變量是影響工作區(qū)碰撞的因素。為了正確評估兩種車道關(guān)閉策略之間的比較，追求了以下主要研究目標(biāo)：（1）檢查兩種交通控制方法的碰撞經(jīng)驗(yàn)結(jié)果，以及（2）重新檢查愛荷華州的優(yōu)缺點(diǎn)與傳統(tǒng)的右車道閉合相比，采用編織法。這項(xiàng)研究分析了2000年1月1日至2005年12月31日之間的撞車數(shù)據(jù)，分析了阿肯色州車道關(guān)閉策略的特征。分析的結(jié)果按以下順序組織：（1）原始碰撞次數(shù)（皮爾遜卡方檢驗(yàn)和單向方差分析檢驗(yàn)）； （2）崩潰率（配對t檢驗(yàn)）；這項(xiàng)研究的分析結(jié)果可用于DOT，以參考AHTD通過結(jié)合使用愛荷華州織法而完成的令人印象深刻的康復(fù)工作。統(tǒng)計分析的結(jié)果表明，使用愛荷華州編織配置時，崩潰率降低了大約30％。盡管如此，邏輯回歸模型的最終結(jié)果發(fā)現(xiàn)，愛荷華州織法和常規(guī)右車道關(guān)閉之間在改變碰撞嚴(yán)重性方面的安全優(yōu)勢在統(tǒng)計學(xué)上并不顯著。在邏輯回歸模型中，發(fā)現(xiàn)交通量是最嚴(yán)重影響碰撞嚴(yán)重性的參數(shù)。而且，發(fā)現(xiàn)照明條件和相交的街道對撞車的嚴(yán)重程度的影響微不足道。

著錄項(xiàng)

  • 作者

    See, Chen Fei.;

  • 作者單位

    University of Kansas.;

  • 授予單位 University of Kansas.;
  • 學(xué)科 Engineering Civil.;Transportation.
  • 學(xué)位 M.S.
  • 年度 2008
  • 頁碼 127 p.
  • 總頁數(shù) 127
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 建筑科學(xué);綜合運(yùn)輸;
  • 關(guān)鍵詞

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