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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., 06/21/2019
E.g., 06/21/2019
Thursday, August 24, 2017 - 15:30
This report identifies improvements to guidance, education and practice to ensure the fundamental objectives of road design are achieved in new and existing road projects. The report provides a foundational road design definition and a series of road design principles that it recommends be incorporated into the Austroads Guide to Road Design. While the...
Monday, July 31, 2017 - 19:00
This report describes the research conducted by the University of Minnesota and project partners on roadway embankment overtopping by flood water. Roadway overtopping is a major safety concern for Minnesota transportation managers because of the potential for rapid soil erosion and mass wasting resulting in partial or complete failure of the roadway embankment...
Wednesday, July 26, 2017 - 17:30
In 2010, the Minnesota Department of Transportation installed the first Reduced Conflict Intersection (RCI) in the City of Willmar. Since 2010, seven more were constructed, with more planned. The RCI concept is gaining popularity in several states, including Maryland, Mississippi, Missouri, North Carolina, and Wisconsin. This report includes findings from a...
Wednesday, July 26, 2017 - 17:30
TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 235: Quantifying the Influence of Geosynthetics on Pavement Performance develops a methodology for quantifying the influence of geosynthetics on pavement performance for use in pavement design and analysis. This project focused on the use of geosynthetics in unbound base/subbase...
Tuesday, June 27, 2017 - 17:15
This Urban Motorcycle Design Handbook from Transport for London (UK) sets out the key highway design requirements for motorcycle safety in London and has been developed with valuable input from stakeholder groups. Using this Handbook will lead to a better understanding of how road and traffic conditions affect motorcyclists and how risks can be reduced and...
Tuesday, June 27, 2017 - 17:00
Culvert inspection is a key enabler that allows Minnesota Department of Transportation (MnDOT) to manage the state’s highway culvert system. When quantitative detail on culvert condition is required, an inspector will need to use enhanced inspection technologies. Enhanced inspection technologies such as; laser ring profiling, sonar, inclinometer, mandrel...
Friday, May 26, 2017 - 18:30
Thsi report provides practices and tools to facilitate on-demand retrieval of useful information stored in project files, libraries, and other agency archives. The report defines a management framework for classification, search, and retrieval of transportation information; documents successful practices for organizing and classifying information that can be...
Thursday, May 25, 2017 - 21:00
These guidelines provide a flexible framework to encourage innovation and ensure safety when testing automated vehicle technology on Australian public roads. The guidelines are designed to support different technologies and applications as they emerge. Rather than embed trial requirements in legislation, the guidelines provide a performance-based framework...
Thursday, May 25, 2017 - 21:00
Variable speed limit (VSL) systems utilize information on traffic speed, occupancy, and volume detection, weather, and road surface conditions to determine the appropriate speeds at which drivers should be traveling, given current roadway and traffic conditions. The use of VSL during less than ideal conditions, such as traffic and weather conditions, can...
Wednesday, May 17, 2017 - 20:00
This report gives a scanning overview of the current state of the art on the topic of the appraisal of sustainability within the development of transport plans and investment programs, respectively the extent to which decisions made in this context have taken account of sustainability. The report is based on the result of a questionnaire done within the...
Wednesday, May 17, 2017 - 19:45
This report investigates how the geometric design components of a roundabout may contribute to bicycle crashes. An Australian and New Zealand crash analysis found that most of the crashes occurred at urban local road roundabouts, in 50 km/h speed limit zones. The crashes predominantly occurred on the circulating lane near the entry for an approach road and...
Wednesday, May 17, 2017 - 19:45
Australian and New Zealand road agencies and operators are preparing for the introduction of Automated Vehicles (AVs). 'This report investigates the potential changes needed to the way road networks are managed to consistently support and optimise the outcomes from the introduction of AVs. The project reviewed international and local documents and...

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