This study assesses the relative efficacy of liquefaction models based on geospatial vs. geotechnical data. In particular, state-of-practice geotechnical models based on the Cone Penetration Test (CPT) are compared to geospatial models that use readily available no-cost data. This assessment is performed using a database of ...

Case study research often claims culturevariously definedimpacts infrastructure development. I test this claim using Hofstede’s cultural dimensions and newly available data representing change in national coverage of sewer connections, sewerage treatment, and onsite sanitation between 1990 and 2010 for 21 developing nations. ...

Onsite sanitation systems experience a high failure rate with resulting environmental and public health implications. In the USA alone, the EPA estimates that 10% of the 26 million homes served by onsite systems have failed. If this failure rate is extrapolated to the 8% of the global population that the UN estimates have ...

While the construction of sanitation infrastructure is one of humankind’s greatest public health and environmental engineering achievements, its benefits are not yet enjoyed by all. In addition to the billions of people not yet reached by sanitation infrastructure, at least half of systems constructed in developing contexts ...

Recent quasi-experimental commercial motor vehicle (CMV) driver hours-of-service (HOS) studies published through the Federal Motor Carrier Safety Administration (FMCSA) in 2011 readily identified consistent increases in crash odds as driving time increased. These studies identified time-on-task as a significant indicator of ...

Plane strain loading conditions are present in many transportation-related geostructures, such as long embankments and behind retaining walls. However, the mechanical properties of soils are not typically characterized in plane strain compression. This is due not to lack of interest but because whereas direct shear and ...

The purpose of this two-part project was to respond to gaps in delivering transportation safety education and to develop introductory curriculum materials for both academicians and practitioners. The project objectives included: developing a comprehensive understanding of needs and priorities with regard to safety data ...

It is nationally recognized that commercial motor vehicle (CMV) operators often cannot find adequate and safe parking for rest purposes. This is especially true for the Pacific Northwest, where high-use corridor rest areas are experiencing demand for truck parking that exceeds capacity. These rest areas are intended for ...

The Pacific Northwest region has no data on the assessment and recommendations on rural bridge design and safety subjected to Farm Vehicle (FV) loading. The proposed study will determine how different types of FVs with different characteristics distribute their loads on bridge superstructures. These will be realized through ...

It is generally believed that direct current fast charging (DCFC) infrastructure has a significant effect on consumer adoption of electric vehicles (Evs), especially for long trips. To examine this relationship in Washington state, the expected adoption rate of EVs in each zip code was estimated by using a zero-inflated ...