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., 06/30/2022
E.g., 06/30/2022
Monday, June 15, 2020 - 13:45
The purpose of this study was to determine the effectiveness of enhancing existing isolated underpasses with wildlife fencing. One mile of 8-ft-high wildlife fencing was added to a large bridge underpass and a large box culvert 5 mi apart on Virginia’s I-64. Effectiveness was determined by conducting a 2-year post-fencing camera monitoring study and...
Monday, June 8, 2020 - 14:15
Alternative intersections and interchanges brought major benefits to the United States during the 2008–2018 time period. Given the positive impacts, it stands to reason that similar breakthroughs might be possible at freeway merge and diverge locations. This report describes the outcomes of a project that examined this possibility. The primary tool of...
Monday, June 8, 2020 - 14:15
Alkali—silica reaction (ASR) is a chemical distress mechanism that adversely affects the service life of concrete pavements. Key aspects of the reaction, such as the roles of calcium and aluminum on the structure of the gel and their correlation with swelling properties, have not yet been fully understood owing to the complex reaction mechanism. These...
Monday, June 8, 2020 - 14:15
Connected and automated vehicles (CAVs) will fundamentally change the way people and goods are transported from one place to another. Ensuring the safety of their operation and maintaining a safe transportation network will be paramount for the seamless integration of CAVs on public roads. Primary and secondary research was used in this study to develop an...
Monday, June 1, 2020 - 13:15
The purpose of this document is to provide information for enhancing Active Transportation and Demand Management (ATDM) applications using emerging technologies and data sources. It discusses the emerging technologies and data sources, along with ATDM applications. It provides organizational information and operations and maintenance information for future...
Monday, June 1, 2020 - 13:15
This literature review concerns microplastics from tyre and road wear caused by road traffic. As there is limited knowledge about microplastics in general, and microplastics from road traffic in particular, the Swedish Government commissioned the Swedish National Road and Transport Research Institute (VTI) to, during 2018-2020, develop and disseminate knowledge...
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...

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