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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
Improved Safety And Efficiency Of Protected/Permitted Right Turns In Oregon, David Hurwitz, Christopher M. Monsere, Sirisha Kothuri, Hisham Jashami, Kamilah Buker, Andrew Kading
Improved Safety And Efficiency Of Protected/Permitted Right Turns In Oregon, David Hurwitz, Christopher M. Monsere, Sirisha Kothuri, Hisham Jashami, Kamilah Buker, Andrew Kading
TREC Final Reports
This research aimed to develop an understanding of the safety and operational implications of using the flashing yellow arrow (FYA) in permitted and protected/permitted right turn (PPRT) operations to maximize safety and efficiency. This report includes a review of more than 50 scientific and technical articles on the selection of right turn phasing alternatives and a review of Oregon crash data at intersections with exclusive right-turning lanes from 2011-2013. The study had three phases: 1) a web-based survey, 2) a microsimulation model, and 3) and a driving simulator study. The survey measured Oregon driver’s comprehension of right-turn signal display. Analysis …
Safety Evaluation Of Curve Warning Speed Signs, Karen K. Dixon, Raul Eduardo Avelar, Ida Schalkwyk
Safety Evaluation Of Curve Warning Speed Signs, Karen K. Dixon, Raul Eduardo Avelar, Ida Schalkwyk
TREC Final Reports
This report presents a review of a research effort to evaluate the safety implications of advisory speeds at horizontal curve locations on Oregon rural two-lane highways. The primary goals of this research effort were to characterize driving operations at rural two-lane highway curve locations where advisory speed signs were present, and to determine to what extent these signs play a role in enhancing safety. Placement of advisory speed signs at horizontal curve locations in the State of Oregon is a practice aided by unique and specific state-level policies and, as such, may vary from nationally accepted procedures. Speed data was …
Performance Enhancement Of Bridge Bracing Under Service And Extreme Loads, Peter Dusicka, Max Taylor Stephens, Kate Fox-Lent
Performance Enhancement Of Bridge Bracing Under Service And Extreme Loads, Peter Dusicka, Max Taylor Stephens, Kate Fox-Lent
TREC Final Reports
As truck loads continue to get bigger, the demand on many aging bridges increases. Slender steel structural elements widely used in bridge superstructures and braced substructures to resist these loads are built primarily for tension, however, and can buckle under compressive loads. Portland State University associate professor Peter Dusicka set out to develop and demonstrate the concept of retrofitting bridge brace elements with fiber reinforced composites in order to provide restraint against buckling. The advanced materials consisted of a combination of fiber reinforced polymer (FRP) composite pultruded sections and wet lay-up wraps intended to be applied in the field. This …
Analysis Of Bus Collision Incidents Using Transit Its And Other Archived Operations Data, James G. Strathman, Paul Herman Wachana, Steve Callas
Analysis Of Bus Collision Incidents Using Transit Its And Other Archived Operations Data, James G. Strathman, Paul Herman Wachana, Steve Callas
TREC Final Reports
This report analyzes factors contributing to bus operations safety incidents at TriMet, the transit provider for the Portland Oregon metropolitan region. The analysis focuses on 4,631 collision and non-collision incidents that occurred between 2006 and 2009. Empirical analysis of these incidents draws on a wide array of operator-level data recovered by transit ITS technologies in combination with information from TriMet’s human resources, scheduling, and customer relations databases. Incident frequencies are estimated in relation to operators’ demographic characteristics, employment status, assigned work characteristics, service delivery and performance indicators, temporal factors, and customer information. Apart from identifying factors that are empirically related …