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...
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....
The Asphalt Pavement Analyzer (APA) device was used to characterize the impact of various mix factors on the development of permanent deformation in dense-graded mixes given a standard compactive effort. Factors included two aggregate sizes, three VMA levels, two fines contents, three binder contents and four binder types. All specimens...
The Horsetail Creek (HC) bridge is an example of an Oregon bridge that was classified as structurally deficient and was not designed to withstand earthquake (EQ) excitations. A fiber-reinforced polymer (FRP) rehabilitation was performed on the HC bridge to increase flexural and shear capacities for traffic loads. However, a seismic...
The composite FRP rebars research at Oregon State University was initiated in
1993 principally to develop a non-metallic hollow reinforcement. It was recognized that
the tensile properties of such reinforcement are unquestionably superior to steel, but its
performance in concrete could be problematic. The bond between FRP rebars and
concrete...
With the passage of the American with Disabilities Act (ADA) it has become a civil
rights violation to deny access to persons with disabilities to public transportation. The
ADA requires transit agencies to provide accessible buses or equivalent services to
persons with mobility, sensory or cognitive impairments. This study examines...
This dissertation describes the development of a mechanistic
overlay design procedure. The mechanistic analysis represents a new
trend in both new pavement and overlay design. The greatest advantage
of the mechanistic pavement analysis is that it considers the
fundamental characteristics of materials to be used, is capable of
considering changes...
Significant use of cold in-place recycling (CIR) has occurred in
Oregon since 1984 as an alternative to other rehabilitation techniques
or to the reconstruction of distressed asphalt concrete (AC) pavements.
Due to the initial success of the projects cold recycled during 1984-85,
the Oregon Department of Transportation (ODOT) and Oregon...
Many of the analytical techniques that are currently available are not capable of
analyzing the offtracking of truck and trailer combinations or the path of load overhangs
through a set of curves that are commonly found on forest roads. Advances in the
processing speed of microcomputers have made it possible...