[-] Show simple item record

dc.contributor.advisorSun, Carloseng
dc.contributor.authorHou, Yieng
dc.date.issued2011eng
dc.date.submitted2011 Summereng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on May 23, 2012).eng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionThesis advisor: Dr. Carlos Suneng
dc.descriptionIncludes bibliographical references.eng
dc.descriptionDissertations, Academic -- University of Missouri--Columbia -- Civil engineering.eng
dc.description"July 2011"eng
dc.description.abstractSpeed is one of the characteristics of traffic flow that affect accident rates and severity near work zones. Approximately 25% fatal crashes in work zones involved high speed. In speed-related work zone traffic safety study, 85th percentile speed is usually considered as the measures of effectiveness in evaluating speed management strategies. In order to determine the significance of the improvements of the measure of effectiveness, statistical methodology is applied. However, in spite of the wide use of the 85th percentile speed, statistical test for comparing percentile speeds from different groups of speed population is not as common as t-test and ANOVA for the mean speed. In this thesis, a standard normal Z statistical test for quantiles is derived based on Crammer's asymptotic distribution of sample quantiles. In addition, two research projects that motivated this methodology are presented as case studies of speed-based safety analysis for work zones, as well as excellent illustrations of this new methodology. One is the evaluation of the effectiveness of work zone speed limits. The other one is analysis of the sequential warning lights in night time work zone.eng
dc.format.extentix, 63 pageseng
dc.identifier.urihttp://hdl.handle.net/10355/14332
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartof2011 Freely available theses (MU)eng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2011 Theseseng
dc.subjecttraffic safetyeng
dc.subjectspeed limiteng
dc.subjectwork zoneeng
dc.subjectsequential warning lightseng
dc.subjectaccident rateseng
dc.titleSpeed-based safety analysis for work zoneseng
dc.typeThesiseng
thesis.degree.disciplineCivil engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


Files in this item

[PDF]
[PDF]
[PDF]

This item appears in the following Collection(s)

[-] Show simple item record