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TAC Research Bulletin

The TAC Research Bulletin highlights recently-published reports and articles from around the world with relevance to road transportation in Canada. Full text links are included, so you get more than just the abstract.

E.g., 07/01/2020
E.g., 07/01/2020
Monday, May 25, 2020 - 13:45
The rapid electrification of the transportation fleet in California raises important questions about the reliability, cost, and environmental implications for the electric grid. A crucial first element to understanding these implications is an accurate picture of the extent and timing of residential electricity use devoted to EVs. Although California is now...
Monday, May 25, 2020 - 13:30
The COVID-19 global pandemic altered every aspect of urban life in recent months. In response, city transportation officials around the world have quickly implemented new street design and management tools to keep essential workers and goods moving, provide safe access to grocery stores and other essential businesses, and ensure that people have safe space for...
Monday, May 25, 2020 - 13:30
Advanced driver-assistance systems (ADAS) are becoming widely available in the new vehicle landscape, increasing of both vehicle occupants’ and other road users’ safety. In some vehicles, longitudinal and lateral positioning under certain conditions can be maintained, designating them as having either SAE level 1 (L1) or level 2 (L2) automated...
Monday, May 25, 2020 - 13:15
This webinar, the sixth in the FHWA Sustainable Pavements webinar series, focuses on end of life considerations related to pavement sustainability. The recording can be viewed at https://www.youtube.com/watch?v=ycDcCbZp89A
Monday, May 25, 2020 - 13:15
Load rating is the process of determining the safe load-carrying capacity of a bridge; however, when plans and details are insufficient to determine the overall capacity of the structure, alternative methods must be used to infer what the live load capacity is. Two viable methods allowed by the AASHTO Manual for Bridge Evaluation are the commonly used but...
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...

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