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., 11/28/2022
E.g., 11/28/2022
Monday, September 12, 2022 - 17:00
The uptake of recycled materials in New Zealand’s pavements is currently low. Waka Kotahi NZ Transport Agency wishes to increase the use of recycled materials in pavements to contribute to a circular economy. However, given that transport distances and processing requirements for some recycled materials can be significant, Waka Kotahi wants to identify...
Monday, August 22, 2022 - 20:15
The deployment of autonomous vehicle (AV) technologies may hold health and safety benefits for drivers across the driving lifespan (>18 years of age). However, up until now, the perceptions of such drivers about AVs have not been examined with a combined approach of using surveys and pre- and post-exposure to the actual technology. Lived experiences of...
Monday, August 22, 2022 - 20:15
Previous researchers found that the most important accident causation factor was the driver’s abnormal driving status, which was associated with driving volatility. And the driving volatility can be traced from the trajectories of the vehicles that were embedded in the BSMs. Based on these findings, we developed an automatic safety diagnosis system for...
Monday, August 22, 2022 - 20:15
This project aims to know how the Intelligent Vehicle Technologies (IVT) can improve Vulnerable Road Users’ (VRU) safety in different environments and conditions (e.g., sight distance and traffic flow) at signalized intersections. For the statistical analysis on historical aggregate crash data, the project studied risk factors on crash injury severity for...
Monday, August 22, 2022 - 20:00
The document provides the transportation operations community (public agencies, consultants, and researchers involved in planning for, designing, operating, and maintaining transportation operations and management systems) with information on practices in coordinating with information technology staff. This material focuses on the value of coordination and...
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...

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