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., 07/06/2022
E.g., 07/06/2022
Monday, April 12, 2021 - 18:00
The project investigated the ability of CV2X and DSRC communication systems to accurately send and receive data between vehicles which have lost their line-of-sight due to occluding obstacles. A propagation model to predict received radio power is developed using WinProp. The power prediction from the model is combined with packet reception data from actual...
Monday, April 12, 2021 - 17:45
Edge lane roads (ELRs), also known as advisory bike lanes or advisory shoulders, are a type of shared street where two-way motor vehicle (MV) traffic shares a single center lane, and edge lanes on either side are preferentially reserved for vulnerable road users (VRUs). This work comprises a literature review, an investigation of ELRs’ operational...
Monday, April 12, 2021 - 17:45
This report summarizes the results of task 7 for the project titled “Developing a Methodology for Implementing Safety Improvements on Low-Volume Roads in Montana.” This task aims at assessing the potential benefits of the network screening methodology developed and proposed in task 6 of this project. To that end, an economic assessment was performed...
Monday, April 12, 2021 - 17:45
To prevent roadway departure crashes, rumble strips have been installed on Louisiana’s two-lane highways. This study investigated the impact of rumble strips on 1,593.09 miles of two-lane highways in Louisiana, on which centerline rumble strips (CLRS) and shoulder rumble strips (SRS) were installed between years 2010 and 2016. The comprehensive evaluation...
Monday, April 12, 2021 - 17:30
Run-off-road traffic crashes account for almost one-third of the deaths and serious injuries each year on U.S. highways. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 296: Guidelines for Cost-Effective Safety Treatments of Roadside Ditches provides new proposed design guidance for the configuration of ditches adjacent to...
Monday, April 12, 2021 - 17:30
This project studied the performance of geotextile-reinforced test sections when compared to an unreinforced case to assess benefit in terms of an extension of the life of the pavement. A single test track was constructed in an indoor test facility and contained two test sections with a reinforcement geotextile (woven and non-woven) while the third section was...
Monday, March 22, 2021 - 15:15
Municipalities across Minnesota have turned to Complete Streets in an attempt to develop more usable roads for their residents. This report investigates how Complete Streets are reshaping one Minnesota community. In 2013, Richfield, a suburb of Minneapolis, enacted a particularly innovative Complete Streets policy. Known locally as "Richfield Sweet Streets...
Monday, March 22, 2021 - 15:00
A study was undertaken to investigate the source of the Ohio DOT culvert outlet protection design methodology and to compare this method with other State DOTs and FHWA methodologies.  The original source of the Ohio DOT methodology was long thought to be a study conducted by The University of Cincinnati (Laushey, 1966).  However, a meaningful...
Monday, March 22, 2021 - 15:00
Application of exterior coatings and membrane waterproofing on precast reinforced concrete box culverts, three-sided flat-topped culverts, and precast reinforced concrete arch and round sections is required by Ohio Department of Transportation (ODOT). Sealing and waterproofing limit the intrusion of ground water through the top of the joint and it protects the...
Monday, March 22, 2021 - 14:45
This pilot project is one among many efforts by the Iowa Department of Transportation (DOT) and the Iowa Highway Research Board (IHRB) to develop and enhance a risk-based transportation asset management plan (TAMP). This project specifically focused on flooding and developed a suite of methodologies and proxy indicators to assess the risk of transportation...
Monday, March 22, 2021 - 14:45
Estimating latent, or suppressed, demand for walking and cycling is an emerging science in New Zealand, with limited research into the application and effectiveness of the different methods employed around the country over the past decade. This first stage of this research employed a literature review, and a survey and interviews of practitioners, to understand...
Monday, March 15, 2021 - 18:45
This report presents an analysis of the potential macroeconomic impacts resulting from the adoption of higher level automated driving systems (ADS) of the long-haul trucking industry in the United States. The analysis uses USAGE-Hwy, a computable general equilibrium (CGE) model of the U.S. economy that includes detail on transportation related industries...

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