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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., 06/26/2017
E.g., 06/26/2017
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...
Wednesday, May 17, 2017 - 19:30
On August 1, 2007, the I–35W Mississippi River Bridge (I–35W Bridge) in Minneapolis, MN, collapsed. The National Transportation Safety Board (NTSB) turned to the Federal Highway Administration (FHWA) to provide technical expertise during their investigation. In response, NTSB issued recommendations to FHWA and the American Association of State...
Wednesday, May 17, 2017 - 19:30
This report describes an investigation of analytical, Highway Capacity Manual (HCM)-compatible evaluation methods for urban street active transportation and demand management (ATDM). ATDM strategies have been successfully deployed in the United States, but the lack of available analytical methods may be reducing their successful adoption by more cities. To...
Thursday, May 11, 2017 - 15:30
Automated vehicle (AV) technology has the potential to completely change how we travel, how we ship goods, and on a larger scale, how we think about mobility. While fully automated vehicles are not yet commercially available, the technology is developing rapidly and some robotic driving functions are already on public roads today. Nevertheless, the challenges...
Thursday, May 11, 2017 - 15:30
Le rapport présente l’état actuel des connaissances sur les risques climatiques pour le secteur canadien des transports et identifie les pratiques d’adaptation existantes ou potentielles. Le rapport comprend six chapitres sur les régions et un chapitre sur le secteur urbain qui reflètent les différentes répercussions des changements climatiques et...
Thursday, May 11, 2017 - 15:15
This report presents the current state of knowledge about climate risks to the Canadian transportation sector, and identifies existing or potential adaptation practices. The report includes six regional chapters and one urban chapter which reflect the different climate change impacts, vulnerabilities and opportunities across Canada. Adaptation approaches are...
Monday, March 13, 2017 - 20:45
This paper investigates the trends of longitudinal and transverse cracking in jointed concrete pavements based on Long-Term Pavement Performance (LTPP) Program Strategic Study of Structural Factors for Rigid Pavements (SPS-2) data. The impacts of slab properties, base type, traffic volume, and environmental factors on the occurrence and extent of longitudinal...
Monday, March 13, 2017 - 20:45
Center line rumble strips (CLRSs) and shoulder rumble strips (SRSs) are proven countermeasures for reducing roadway departure crashes, including head-on and run-off-road crashes. The objectives of this project were twofold. The first objective was to develop a rumble strip decision support guide to inform agencies on CLRS and SRS installation. The second...

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