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., 08/19/2022
E.g., 08/19/2022
Monday, August 8, 2022 - 17:45
The use of precast pretensioned girders using 0.7-in. diameter strands would help bridge designers extend the spans of the existing girder shapes.   The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 315: Details of the Study on the Use of 0.7-in Diameter Strands in Precast Pretensioned Girders is supplemental to NCHRP...
Monday, August 8, 2022 - 17:45
Long-span bridges are often used in environmentally sensitive terrains, water crossings, and in locations with traffic and geometric restrictions.   The TRB National Cooperative Highway Research Program's NCHRP Research Report 994: Use of 0.7-in. Diameter Strands in Precast Pretensioned Girders presents the design methodology for precast pretensioned...
Monday, August 8, 2022 - 17:30
The variety of median widths and terrains combined with evolving testing specifications and lack of conclusive data on median crossover crashes have been obstacles to developing median barrier guidance.   The TRB National Cooperative Highway Research Program's NCHRP Research Report 996: Selection and Placement Guidelines for Test Level 2 Through Test...
Wednesday, August 3, 2022 - 14:15
Integral abutment bridges have become popular worldwide by eliminating movable shoes which are expensive to purchase, install, and maintain in conventional bridges. However, the behavior of bridge abutments subjected to air temperature changes for integral bridges is different from that of conventional bridges. Expansion and contraction of bridge girders due to...
Wednesday, August 3, 2022 - 14:15
Research has explored the benefits of innovative pedestrian and bicycle facilities, but it is unclear how pedestrians and bicyclists learn to properly use them. This report provides information on new pedestrian and bicycle treatments and (1) the behavior and knowledge of pedestrians, bicyclists, and drivers traversing through, on, and around the new facilities...
Monday, July 25, 2022 - 16:00
First launched more than 10 years ago, the Road Safety Toolkit is an important online resource that provides free information on the causes and prevention of road crashes that result in death and injury. It will continue to be a freely available tool that provides practical, up-to date knowledge of how treatments can be implemented. The resource web site is...
Monday, July 25, 2022 - 15:45
Guide to Pavement Technology Part 4E: Recycled Materials presents the latest information about products manufactured from recycling various waste materials accepted through registered recycling and reprocessing facilities. This includes the specification, manufacture and application of products derived from the recovery of construction and demolition waste (C...
Monday, July 25, 2022 - 15:45
The Florida low profile barrier—consisting of multiple interconnected portable concrete segments—is typically utilized in construction zones to separate traffic from construction activities. The original development and validation (crash testing) of the barrier were in accordance with applicable standards at the time (NCHRP Report 350). In the...
Monday, July 11, 2022 - 18:30
The research aimed to identify and recommend designs of quick build protective measures for cycleways for introduction in Aotearoa New Zealand. The pros and cons of different forms of infrastructure for safe, quick build cycleways were laid out. The full report is available from the New Zealand Transport Agency web site at https://www.nzta.govt.nz/resources/...
Monday, July 11, 2022 - 18:15
Road crashes kill over 1.3 million people every year worldwide and seriously injure millions more. A Safe System approach to road safety can drastically reduce road deaths – but how can it actually be put in place? This report provides experience-based guidance on implementing the Safe System approach. The repor an supporting case studies are available on...
Monday, July 11, 2022 - 18:15
This report contains the collection of case studies related to in-place recycling with cement, emulsion or foamed bitumen, hot mix and cement concrete recycling in a plant. The current collection of case studies is part of a set of three publications on the “Use of Recycled Materials in Pavements” expected for the 2020-2023 cycle. This report can...
Monday, July 11, 2022 - 18:00
PIARC's Technical Committee 1.5 - Disaster Management, has established a task related to the Use of Big Data and Social Networks for Disaster Management. This task considers new information evolutions such as big data and social networks. It involves an international literature review, collection and analysis of case studies and engagement with worldwide...

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