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  • Optimal sensor placement for measuring operating speeds through curves on rural two-lane highways

    Creator:
    Mecham, Megan E.
    Abstract:
    Operating speed is one of the best performance measures that can tell transportation agencies how well or how poorly the transportation system is functioning. Fluctuating operating speeds often mean there is a design flaw or something about the physical road design that violates drivers' expectations. A primary example of this...
    Resource Type:
    Masters Thesis
    Full Text:
    Title: Optimal Sensor Placement for Measuring Operating Speeds through Curves on Rural Two-Lane

  • Safety performance of curve advisory speed signs

    Creator:
    Avelar Moran, Raúl Eduardo
    Abstract:
    Posting advisory speed signs at sharp horizontal curve sites is a practice well established in the United States. The purpose of these signs is to provide the driving public with a safe speed to negotiate such curves; however, the link between these signs and safety has not yet been clearly...
    Resource Type:
    Dissertation
    Full Text:
    presented on April 10, 2012. Title: Safety Performance of Curve Advisory Speed Signs Abstract

  • Cross-section fatal crash type prediction models

    Creator:
    Zhu, Hong
    Abstract:
    The rural two-lane highway in the southeastern United States is frequently associated with a disproportionate number of serious and fatal crashes. The major research objectives are to investigate the relations between probabilities of fatal crash type occurrence and potential contributing factors from road geometric design characteristics and roadside, environmental features....
    Resource Type:
    Dissertation
    Full Text:
    5: PERCENT TWO-LANE RURAL ROAD FATAL CRASHES

  • The evaluation and selection of highway safety improvements for local jurisdictions

    Creator:
    Haq, Asif Jinnah
    Abstract:
    Many hazardous locations exist on our local and street highway systems. Such hazards contribute to the frequency and severity of traffic accidents. The elimination and mitigation of the hazards reduces accident frequency and severity, as measured by the number of fatalities, injuries and property damage resulting from the accidents. The...
    Resource Type:
    Masters Thesis
    Full Text:
    only accidents. The reduction in accidents because of the safety improvement are used to measure the

  • A Review of Current State Department of Transportation Practice for Promoting and Documenting the Safety of Field Employees

    Creator:
    Barlow, Zachary Wesley
    Abstract:
    State Departments of Transportation (DOTs) are the primary owners of roadway infrastructure in the United States. Many of the employees of state DOTs work on roadway work sites, putting them at disproportionately higher risks of injury or fatality. A review of the literature determined that a combination of policies, standards,...
    Resource Type:
    Masters Thesis
    Full Text:
    Practice for Promoting and Documenting the Safety of Field Employees Abstract approved

  • Driving simulation : a mechanism for understanding driver response to mobile barriers in work zones

    Creator:
    Swake, Joshua
    Abstract:
    Highway construction projects require temporary changes in roadway characteristics, such as the number of operational lanes, lane path, lane width, shoulder width, and posted speed limit. These modifications which are often temporary in nature have the potential to impact driving performance. Many research efforts have focused on developing standards to...
    Resource Type:
    Masters Thesis
    Full Text:
    Research Center for Road Safety to enable its use for design and verification of the effectiveness of

  • Impact of access density on number of crashes at commercial roadways

    Creator:
    Yi, Xiang
    Abstract:
    Numerous research efforts have proven the safety benefits of access management. There are several access management techniques, including unsignalized access spacing, signalized intersection spacing, left-turn lanes, right-turn lanes, Two-Way Left-Turn lanes (TWLTLs), nontraversable median, U-turns, interchange access separation distances and so on. This project explores the correlation between access density...
    Resource Type:
    Masters Thesis
    Full Text:
    improve safety. Although the specific relationships vary according to road geometry, travel speeds, and

  • The evolution of practical safety audits in the United States

    Creator:
    Houghton, Tegan Marie
    Abstract:
    This thesis evaluates pre-construction auditing procedures used in the United Kingdom, Australia, and New Zealand in order to help create post-construction auditing procedures for the state of Oregon. It was funded as part of the development of the Oregon Department of Transportation (ODOT) Safety Investigation Manual, and also evaluates content...
    Resource Type:
    Masters Thesis
    Full Text:
    on Safety Audits 2.1: Background on Use A road safety audit “…is a formal and independent safety

  • Evaluating safety at Oregon‘s isolated, high-speed, signalized intersections

    Creator:
    Kopper, Neil H.
    Abstract:
    Isolated approaches at signalized intersections with posted speed limits of 45 mph or greater generally experience large numbers of rear-end and angle collisions. A combination of less attentive drivers, high operating speeds, and less than ideal intersection characteristics can result in crash frequencies well above expected rates. A number of...
    Resource Type:
    Masters Thesis
    Full Text:
    Ahead RSA Road Safety Audit RSAR Road Safety Audit Review SAS Signal Ahead Sign SLOS Safety

  • Pedestrian safety at signalized intersections operating the flashing yellow arrow

    Creator:
    Tuss, Halston
    Abstract:
    At signalized intersections, pedestrians are considered to be amongst the most vulnerable. When in the crosswalk at intersections without protected left-turn phasing, pedestrians are particularly at risk from left-turning vehicles. Until recently, a wide variety of indications were in use across the US to indicate a permissive left-turn condition to...
    Resource Type:
    Masters Thesis
    Full Text:
    simulator located at the European Interuniversity Research Center for Road Safety by carefully recreating