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., 08/15/2022
E.g., 08/15/2022
Monday, May 11, 2020 - 13:15
This project included four distinct but related exploratory studies of data sources that could improve roadway safety analysis. The first effort evaluated passively gathered crowdsourced bicyclist activity data from StreetLight Data and found promising correlations (R2 of 62% and 69% for monthly weekday and weekend daily averages) when the StreetLight data were...
Monday, May 4, 2020 - 14:15
Multimodal transportation such as transit, bike, walk, transportation network companies (TNCs) (e.g., Uber, Lyft), car share, and bike share are vital to supporting livable communities. However, current data collection techniques for multimodal travel behavior, including apps built specifically for travel behavior surveys, have limitations (e.g., significant...
Monday, May 4, 2020 - 14:15
This webinar, presented on 29 April 2020, discusses the merits of three options to advance the future of PBS access in Australia as it relates to bridges. The webinar explains the role that PBS bridge formulae play in vehicle design and approval. It looks at the historical development of the formulae and under which circumstances it most accurately predicts...
Monday, May 4, 2020 - 14:00
Typical maintenance activities by the Virginia Department of Transportation (VDOT) for existing asphalt pavements involving a periodic placement of a 1.5-in to 2-in layer of asphalt concrete are becoming increasingly costly.  When applied at the right time, pavement preservation treatments can restore a smooth, safe driving surface while saving money on...
Monday, May 4, 2020 - 14:00
These recordings present highlights and findings of the NCHRP Domestic Scan 16-02 on Landscape Design Practices for Roadside Water Management. This scan investigated how transportation agencies are applying principles and practices of green infrastructure (GI) for roadside water management to mitigate adverse impacts of flooding, drought, and temperature...
Monday, May 4, 2020 - 14:00
One of the first Geosynthetic Reinforced Soil—Integrated Bridge System (GRS-IBS) projects to be instrumented and evaluated under the Federal Highway Administration's (FHWA's) Every Day Counts program was a replacement bridge along County Road 47 over Trout Brook in the town of Stockholm within St. Lawrence County, NY. This GRS-IBS is aligned on a...
Monday, May 4, 2020 - 14:00
This document describes Hill Descent Monitoring (HDM) schemes associated with the Telematics Monitoring Application (TMA). An HDM scheme is administered by an appropriate road authority or regulator (‘Authority’). Hill Descent Monitoring schemes provide Authorities with a way to manage sections of road with hazardous grades and road alignments...
Monday, May 4, 2020 - 13:45
Five different business models for mobile fare payment apps are examined, as the world of apps used by transit agencies in the United States and Canada continues to steadily grow. The TRB Transit Cooperative Research Program's TCRP Synthesis 148: Business Models for Mobile Fare Apps documents current practices and experiences of transit agencies that...
Monday, May 4, 2020 - 13:45
Cyclists and noncyclists have a wide range of perceptions of on-street bicycling facility designs — including sharrows, bike lanes, and buffered bike lanes — along a variety of roadway types, with and without curbside automobile parking. The TRB National Cooperative Highway Research Program's NCHRP Research Report 941: Bicyclist Facility...
Monday, May 4, 2020 - 13:45
Spectroscopy, which is a study of interactions between matter and electromagnetic radiation that has been around for decades, provides a way of analyzing materials. Its methods can tell us exactly what a material contains and can produce unequivocal results that make it possible for highway agency personnel to quickly determine whether a material is or is not...
Monday, April 27, 2020 - 13:45
Pedestrians’ acceptance of automated vehicles (AVs) depends on their trust in the AVs. We developed a model to promote pedestrians’ trust in AVs through implicit communications. To empirically verify this model, we conducted a human subject study with 30 participants in a virtual reality environment. The study manipulated two factors: AV driving...
Monday, April 27, 2020 - 13:45
This project established protocols to help evaluate the utilization of chemical stabilization methods to potentially improve the engineering behavior of problematic soils with and without soluble sulfates within the state of Montana. In addition, construction life cycle cost analyses were used to compare existing approaches used by MDT versus chemical...

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