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Filtering by: Creator Schlauch, Karen A. Remove constraint Creator: Schlauch, Karen A. Advisor Dixon, Karen K. Remove constraint Advisor: Dixon, Karen K.

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  • 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:
    Evolution of Practical Safety Audits in the United States by Tegan Marie Houghton A THESIS

  • Normal acceleration characteristics of the leading vehicle in a queue at signalized intersections on arterial streets

    Creator:
    Zhu, Hong
    Abstract:
    Normal acceleration characteristics of passenger cars provide valuable information for various aspects of transportation engineering, including use in the geometric designs of intersections, freeway ramps, passing lanes, acceleration lanes, turning bays, or in the development of traffic simulation or fuel consumption models. However, the data used in previous studies are...
    Resource Type:
    Masters Thesis
    Full Text:
    Vehicle in a Queue at Signalized Intersections on Arterial Streets Abstract approved

  • 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:
    Highways Abstract approved: Karen K. Dixon Operating speed is one of the best

  • 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:
    Roadways Abstract approved: Karen K. Dixon

  • A validation of the Oregon State University driving simulator

    Creator:
    Brown, Lacy S.
    Abstract:
    Driving simulation is widely accepted as a safe, effective, and economical alternative for investigating driver behavior in a variety of contexts. However, in order to apply simulator-based research results to real-world settings, the performance measures acquired through simulated driving experiments must first be validated. This research was aimed at validating...
    Resource Type:
    Masters Thesis
    Full Text:
    : ________________________________________________________ Karen K. Dixon Driving simulation is widely accepted as a safe, effective, and economical

  • Effectiveness of curve advisory speed signs : a characterization of road operations in western Oregon

    Creator:
    Avelar Morán, Raúl Eduardo
    Abstract:
    Posting advisory speed signs at sharp horizontal curve locations is a common practice in the U.S. These signs recommend drivers safe speeds to negotiate such curves. Literature indicates that adherence to advisory speeds is, in general, poor. Moreover, limited research is available that quantifies safety implications of these signs. This...
    Resource Type:
    Masters Thesis
    Full Text:
    . CONTRIBUTION OF AUTHORS Appendix H of this report is coauthored with Karen K. Dixon, as it is a

  • Safety Audits: A Comparison of Traditional Safety Audits to the Interactive Highway Safety Design Model

    Creator:
    Houghton, Tegan Marie
    Abstract:
    In the United States there are currently two different options for providing safety audits to roadway projects. Traditional audits can be conducted using procedures similar to those in the United Kingdom, or those similar to Australia and New Zealand (Austroads). Another option for conducting safety audits is to use the...
    Resource Type:
    Honors College Thesis
    Full Text:
    Safety Audits: A Comparison of Traditional Safety Audits

  • Developing safety performance functions for 4-leg single-lane roundabouts based on Oregon data : a case study

    Creator:
    Zheng, Jianfei
    Abstract:
    Roundabouts have become an alternative for traditional intersections due to the safer operational performance. Previous research has provided crash modification factors (CMFs) as a criterion based on before-after studies as to evaluate the safety performance of roundabouts. One drawback of assessment based on crash modification factors, however, is that a...
    Resource Type:
    Masters Thesis
    Full Text:
    : Developing Safety Performance Functions for 4-leg Single-lane Roundabouts Based on Oregon Data: A Case

  • 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:
    : _____________________________________________ Karen K. Dixon Isolated

  • Road user understanding of shared lane pavement markings (sharrows) case study - Corvallis, OR

    Creator:
    Cosma, Ioana
    Abstract:
    This thesis focuses on shared use lane facilities and road user understanding. Shared use lanes (sharrows) are a common solution for road facilities that are too narrow to accommodate a full bicycle lane and where the local jurisdiction wants to reduce dooring crashes. In recent years, engineers have focused on...
    Resource Type:
    Masters Thesis
    Full Text:
    : Karen K. Dixon This thesis focuses on shared use lane facilities and road user understanding