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., 12/03/2022
E.g., 12/03/2022
Monday, November 28, 2022 - 18:45
Cost-benefit analyses assess the economics of a proposal by valuing (monetising) the costs and benefits to all members of society. However, CBAs sum across a wide range of people and don’t calculate inequities between groups or individuals, or who ultimately benefits from the project. The research was therefore carried out as the CBA appraisal approach...
Monday, November 28, 2022 - 18:45
This project created tools, empowered by big data, that can identify in real-time the onset of congestion and the occurrence of incidents, for both freeways and arterials. The target audience is highway system managers. The tools all track travel rates and flows, in real-time, towatch for trends that suggest the system’s operating status is changing;...
Monday, September 26, 2022 - 15:15
This project develops a comprehensive analytical framework for risk-based infrastructure asset management for both normal and extreme management conditions. We integrate analytical procedures for quantitative risk assessment, asset management, and economic impact analysis into a holistic methodological framework for comprehensive assessment of the benefit and...
Monday, September 26, 2022 - 15:15
Snow and ice can easily accumulate on the lenses of signal lights and block light to the drivers of vehicles or locomotive engineers. Snow-clogged signal lights can decrease the performance of signalized intersections and railroads and may result in collisions in inclement weather conditions. The TRB IDEA (Innovations Deserving Exploratory Analysis)...
Monday, September 19, 2022 - 18:00
This seminar was held on 2 September 2022 at RMIT University in Melbourne. It was sponsored by Austroads and attracted an audience of more than 400 people across the world. The 4-hour recording considers different perspectives of incorporating waste plastic into road and transport infrastructure. The first half of the session includes presentations by...
Monday, September 19, 2022 - 17:45
On September 28, 2021, City of Ottawa staff approved the Protected Intersection Design Guide technical guidance document under delegated authority. The purpose of this document is to provide guidance on the design of protected intersections within the City of Ottawa. The Guide aligns with current legislation, regulations, and high-level policies, and builds...
Monday, September 19, 2022 - 17:45
Minnesota’s harsh climate requires dense, durable asphalt to avoid frequent maintenance and replacement. Asphalt mixes as designed in the laboratory, however, don’t always perform consistently in the field. A new Superpave mix shows promise for providing cost-effective, high-performing pavements for state roadways. The project description and links...
Monday, September 12, 2022 - 17:45
Motorists suddenly stopping or swerving to avoid small animals crossing the road create significant hazards. Pedestrians trying to assist the animals across the road risk serious injury, as do motorcyclists and bicyclists if they hit an animal. Turtles are the world’s most imperiled group of vertebrates, and roads are a primary threat. A multiyear...
Monday, September 12, 2022 - 17:30
A cost-effective and environmentally friendly asphalt repaving method will now be more efficient. Cold in-place recycling (CIR) involves pulverizing the top layer of old pavement, mixing it with water and a stabilizing agent such as emulsified asphalt, and reapplying the mixture to fill in holes and cracks. A final layer is added to seal and preserve the...
Monday, September 12, 2022 - 17:30
School and public transportation buses subjected to recurring congestion delays result in these modes becoming both more expensive to operate and often less-competitive as mobility options. Maintaining existing coverage and frequency requires increases in operating and capital expenses. Failing to maintain coverage and frequency encourages mode shifts which may...
Monday, September 12, 2022 - 17:15
This report presents the results of a mixed-methods study of the 2020-2022 Oakland Slow Streets program. An official response to the Covid-19 pandemic, the program used signs and temporary barricades to limit thru-traffic on 21 miles of city streets to create more and safer space for walking, cycling, and outdoor recreation. Researchers collected data...
Monday, September 12, 2022 - 17:15
The majority of traffic count portable data collections is done by road tube. While the hardware unit costs for road tubes are low, installation requires workers to kneel in the middle of the road sujecting them to potential harm. The TRB IDEA (Innovations Deserving Exploratory Analysis) Program's NCHRP IDEA Final Report for Project 216: A Portable Single...

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