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Filtering by: Creator Minor, David Remove constraint Creator: Minor, David Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • 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:
    : ______________________________________________________ David S. Hurwitz At signalized intersections, pedestrians are considered to be amongst

  • Development of a new mixture proportioning method and assessing the influence of material characteristics on flowing concrete mixtures

    Creator:
    Hendrix, Greg
    Abstract:
    Cast-in-drilled-hole (CIDH) piles are often constructed to depths that are inaccessible to internal vibration of the concrete. Internal vibration is necessary to consolidate the concrete and, if not performed, then typically inspection pipes are necessary to detect the presence of voids in CIDH piles. Void detection is critical to assessing...
    Resource Type:
    Masters Thesis
    Full Text:
    Flowing Concrete Mixtures Abstract approved: David Trejo Cast-in-drilled-hole (CIDH) piles

  • Evaluation of a Pedestrian Call Extension and Cancelation System at a Midblock Trail Crossing

    Creator:
    Milacek, McKenna
    Abstract:
    Signalized intersections often provide pushbuttons to call for pedestrian service to minimize conflicting movements between road users. Signalized midblock crossings typically increase safety for pedestrians in locations with high traffic volumes and multiple lanes in each direction. However, unnecessary vehicular delay occurs from “ghost” pedestrian intervals when someone activates the...
    Resource Type:
    Masters Thesis
    Full Text:
    David Hurwitz Signalized intersections often provide pushbuttons to call for pedestrian service

  • Critical Assessment of Chloride States and Quantities in Ordinary Portland and Specialty Cements

    Creator:
    Ahmed, Ahmed Abdulhaq
    Abstract:
    The constituent materials of concrete often contain chlorides. The presence of chlorides in sufficient amounts can disrupt the passive layer, also known as the passive film, that protects the reinforcing steel in concrete. This disruption can lead to premature corrosion of the reinforcing steel in concrete. To minimize the risk...
    Resource Type:
    Dissertation
    Full Text:
    Cements Abstract approved: ________________________________________________ David Trejo

  • Chemical transformation of rice husk ash for sustainable, constructable, and durable binary cementitious system

    Creator:
    Prasittisopin, Lapyote
    Abstract:
    The production of cement and concrete results in the production of large amounts of CO₂ emissions which can have significant negative environmental impacts. Using supplementary cementing materials (SCMs) as a cement replacement is an effective solution to reduce these negative environmental impacts, as most SCMs are waste by-products from other...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ David Trejo The production of cement and concrete results in the production of large amounts

  • Consideration of Driver Behavior in the Design of Red Light Extension Systems

    Creator:
    McCrea, Sarah Anne
    Abstract:
    Red Light Running (RLR) is a safety hazard at signalized intersections in Oregon and throughout the United States. Various methods of mitigating factors contributing to RLR have been implemented but few protect against a conflict when a vehicles runs a red light. Additionally, current prediction algorithms are complicated; there is...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________ David S. Hurwitz Red Light Running (RLR) is a safety hazard at signalized

  • An evaluation of gap acceptance behavior at unsignalized intersections

    Creator:
    Nabaee, Sahar
    Abstract:
    Gap acceptance behavior is critical to the safety and operational performance of unsignalized intersections. The complex nature of the human behavior and its dependence on various socioeconomic and environmental parameters makes it challenging for transportation professionals to assess the performance of such intersections. To investigate the behavioral patterns of drivers...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: _____________________________________________ David S. Hurwitz Gap acceptance

  • A safety evaluation of turn lane-adjacent bike lane configurations in Portland, Oregon

    Creator:
    Wyman, Amy
    Abstract:
    The Manual on Uniform Traffic Control Devices prohibits positioning a bike lane right-adjacent to a vehicle turn-only lane to mitigate the potential for right-hook crashes. However, it provides no specific guidance on positioning with respect to bus-only lanes. This thesis describes a before/after safety evaluation of bike lanes positioned left...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ______________________________________________________ David Hurwitz The

  • Construction risks allocation : optimal risk allocation decision support model

    Creator:
    Alsalman, Ali Abdullah
    Abstract:
    It has been suggested that projects in the construction industry are subject to risks more than other industries. However, there is often little parity in allocation of risks in the construction industry. Usually, project participants allocate risks by aversion where owners tend to shift risks to the primary contractor, who...
    Resource Type:
    Dissertation
    Full Text:
    committee members, Dr. Anthony Veltri, Minor professor, Dr. John A. Gambatese, Dr. David Rogge, and Dr

  • In situ measurement of the benthal oxygen requirements of tidal flat deposits

    Creator:
    Crook, Gene Ray
    Abstract:
    In situ light and dark planktonic and benthal respirometers were used to measure the oxygen requirements of Yaquina estuary water and benthal deposits. Respirometer devices were constructed so that actual conditions of mixing could be simulated and benthal deposit disturbance would be minimized. A mathematical model of a benthal respirometer...
    Resource Type:
    Masters Thesis
    Full Text:
    THE BENTHAL OXYGEN REQUIREMENTS OF TIDAL FLAT DEPOSITS Abstract approved: Dr. David A. Bella In