Monday, May 25, 2020 - 13:15
Adjacent box beam bridges are economical bridge systems for accelerated bridge construction. The box beams are constructed at precast plants and are traditionally connected by a shear key filled with grout. This system is typically used for short spans with low clearance restrictions. However, due to the grout deteriorating and debonding from the precast...
Monday, May 25, 2020 - 13:15
There are many situations where tacit communication between drivers and pedestrians governs and enhances safety. The goal of this study was to formalize this communication and apply it to the driving strategy of an autonomous vehicle. Toward this, we performed a field study of the interaction between drivers and pedestrians. Vehicles were instrumented to...
Monday, May 25, 2020 - 13:15
Vision-based trajectory analysis of road users enables identification of near-crash situations and proactive safety monitoring. The two most widely used surrogate safety measures (SSMs), time-to-collision (TTC) and post-encroachment time (PET)—and a recent variant form of TTC, relative time-to-collision (RTTC)—were investigated using real-world...
Tuesday, May 19, 2020 - 15:00
The Minnesota Department of Transportation (MnDOT) constructed its first glass fiber polymer (GFRP) reinforced bridge deck on MN 42over Dry Creek just north of Elgin, Minnesota. Successful implementation of the GFRP reinforced bridge decks would eliminate the steel corrosion problems that often shorten the life of the deck. Although there has been wide use of...
Tuesday, May 19, 2020 - 14:45
The report is action oriented and includes a how-to guide for transit agencies to prepare for and execute data sharing. It describes the key factors determining data sharing decisions, including benefits, costs, and risks, and addresses the legal context. The report presents models for sharing transit data as well as accessing external data sources. Finally, it...
Monday, May 11, 2020 - 13:30
Local governments have steadily increased their initiative to address global climate change, and many present their proposed strategies through climate action plans (CAPs). This study conducts a literature review on current local approaches to greenhouse gas (GHG) reduction strategies by assessing CAPs in California and presents common strategies in the...
Monday, May 11, 2020 - 13:30
The National Pollutant Discharge Elimination System General Permit No. 2 requires the Iowa Department of Transportation (DOT) to develop a stormwater pollution prevention plan for all construction activities that are covered by the permit. The Stormwater Pollution Prevention Plan includes the design, installation, and maintenance of erosion and sediment control...
Monday, May 11, 2020 - 13:15
This project included four distinct but related exploratory studies of data sources that could improve roadway safety analysis. The first effort evaluated passively gathered crowdsourced bicyclist activity data from StreetLight Data and found promising correlations (R2 of 62% and 69% for monthly weekday and weekend daily averages) when the StreetLight data were...
Monday, May 4, 2020 - 14:15
Multimodal transportation such as transit, bike, walk, transportation network companies (TNCs) (e.g., Uber, Lyft), car share, and bike share are vital to supporting livable communities. However, current data collection techniques for multimodal travel behavior, including apps built specifically for travel behavior surveys, have limitations (e.g., significant...
Monday, May 4, 2020 - 14:15
This webinar, presented on 29 April 2020, discusses the merits of three options to advance the future of PBS access in Australia as it relates to bridges. The webinar explains the role that PBS bridge formulae play in vehicle design and approval. It looks at the historical development of the formulae and under which circumstances it most accurately predicts...
Monday, May 4, 2020 - 14:00
Typical maintenance activities by the Virginia Department of Transportation (VDOT) for existing asphalt pavements involving a periodic placement of a 1.5-in to 2-in layer of asphalt concrete are becoming increasingly costly. When applied at the right time, pavement preservation treatments can restore a smooth, safe driving surface while saving money on...
Monday, May 4, 2020 - 14:00
These recordings present highlights and findings of the NCHRP Domestic Scan 16-02 on Landscape Design Practices for Roadside Water Management. This scan investigated how transportation agencies are applying principles and practices of green infrastructure (GI) for roadside water management to mitigate adverse impacts of flooding, drought, and temperature...
