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This project examined how roadside inspections and other law enforcement interactions could be accomplished on automated driving system (ADS)-equipped commercial motor vehicles (CMVs). This included research into: a) how automated CMVs can deliver necessary information to inspectors and b) how automated...
The study aimed to understand the impacts of extreme climatic conditions such as prolonged droughts and intense precipitation due to climate change on the resilience of civil infrastructures like embankments. The knowledge of unsaturated soil mechanics and soil chemistry is integrated to determine the...
The main goal of this project was to identify opportunities to strengthen the National Commercial Driver's License (CDL) program and help the ability of State Driver Licensing Agencies (SDLAs) to maintain compliance with Federal Motor Carrier Safety Regulations (FMCSRs) 49 CFR 383 and 384. The Research...
North Dakota's current driving under suspension (DUS) law, enforcement, and effects are explored from the perspective of the state's municipal and district court judges (including judicial referees/magistrates). Overall weighted results are presented in addition to between-group distinctions. These insights...
The Rocky Mountain Region has experienced considerable difficulty because of alkali-silica reaction (ASR) in concrete construction. Wyoming Department of Transportation was successful in using recycled concrete aggregate (RCA) on Interstate I-80 with limited ASR damage. Reusing concrete from demolition...
Longitudinal joints in Portland Cement Concrete (PCC) pavement slabs require tie (dowel) bars to control joint opening resulting from thermal stresses. Inspections of PCC pavements by the South Dakota Department of Transportation using ground penetrating radar revealed that it is common for tie bars...
Calcium sulfoaluminate (CSA) cement was used to cast a prestressed voided deck slab bridge girder. The rapid-set properties of CSA cement allowed the initial concrete strength to reach the required 4300 psi needed in order to cut the prestressing strands 6.5 hours after casting. Prestress losses were...
Ride-haling such as Uber and Lyft is changing the way people travel and is critical to forecasting mode choice demands and providing adequate infrastructure. Despite widespread claims that these services help reduce driving and the need for parking, little research exists on these topics. This research...
The objectives of this study were to assess geotechnical properties of mine waste amended with fly ash and evaluate reuse of fly ash amended mine waste as road construction material. Three types of fly ash and one type of cement were used as cementitious binder. Natural and synthetic (i.e., laboratory...
For highways located in different counties and cities across the country, specific conditions of weather, terrain, traffic characteristics, highway conditions, population and economic development are all different. Driving environments, traffic accidents and injury risks have strong interactions, which...