Home

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., 09/23/2017
E.g., 09/23/2017
Wednesday, June 22, 2016 - 18:00
Bridge performance measures are important components of any successful Bridge Management System. Different types of performance measures have been developed for various purposes. The types of performance measures are usually a reflection of an agency’s goals. The bridge health or condition index is a type of performance measure used by agencies interested...
Wednesday, June 22, 2016 - 17:45
When more cyclists turn to the roads in Oslo each spring, the risk for each cyclist of being involved in a conflict or near miss is reduced. In other words, there is proof of a Safety in Numbers effect. Comparing Norwegian road users with their Danish and Swedish counterparts shows that this effect can either be accentuated or reduced by differences in...
Thursday, May 12, 2016 - 13:45
This TRB report documents the state of the practice of life-cycle cost analysis (LCCA) and risk-based analysis into state highway agencies' asset management plans for pavements and bridges on the National Highway System. The objective of this project was to develop an inventory of quantitative asset-level, project-level, or corridor-level processes and...
Friday, April 29, 2016 - 14:30
This literature review on the effect of electronic device use on pedestrian safety is part of a research project sponsored by the Office of Behavioral Safety Research in the National Highway Traffic Safety Administration (NHTSA). An extensive literature review was conducted and summarized into three sections: pedestrian distraction, driver distraction, and...
Monday, April 25, 2016 - 20:00
This synthesis documents transit agency parking policies and parking management at transit stations using three primary resources: a scan of current research on transit-supportive parking policies, an original survey distributed to a sample of transit agencies, and several brief agency profiles based on interviews and existing available data. The survey was...
Friday, April 22, 2016 - 20:00
The Iowa Department of Transportation (DOT) is responsible for approximately 4,100 bridges and structures that are a part of the state’s primary highway system, which includes the Interstate, US, and Iowa highway routes. A pilot study was conducted for six bridges in two Iowa river basins—the Cedar River Basin and the South Skunk River Basin—...
Monday, April 18, 2016 - 15:00
This report summarizes all activities completed to backcalculate the elastic layered modulus from deflection basins measured on all test sections included in the LTPP program. Specifically, the report documents the tools, data analyses, backcalculation and forward calculation packages, and procedures used to calculate, on a production basis, the in-place...
Wednesday, April 13, 2016 - 15:30
This report synthesizes the current service limit state (SLS) design and analyses of engineered fills for bridge support used as shallow foundations. The SLS for settlement and deformations of bridge supports are summarized. Extensive literature reviews were conducted to synthesize the effects of various parameters on the SLS of engineered fills. The...
Monday, April 11, 2016 - 19:45
This document is a technical summary of the Federal Highway Administration (FHWA) report, Pavement Structural Evaluation at the Network Level (FHWA-HRT-15-074). It addresses the use of traffic speed deflection devices for the structural evaluation of pavements at the network level. Highlights from three major efforts—gathering information to identify...
Thursday, March 31, 2016 - 16:00
Mobility is central to living an independent life, to participating in society, and to maintaining well-being in later life. The point of departure in this thesis is that retirement implies changes in time-space use and interruption in routines, which influence demands and preconditions for mobility in different ways.  The aim of this thesis is to explore...
Thursday, March 31, 2016 - 15:45
The objective of this research was to assess the efficacy of various waterproofing sealers applied to pavement joints with respect to limiting water ingress. The measure of water ingress was the chloride concentration profile as measured by scanning electron microscopy and energy dispersive spectroscopy. The fieldwork was conducted at the MnROAD facility....
Thursday, March 31, 2016 - 15:45
Part-time shoulder use is the conversion of shoulders to travel lanes during some hours of day as a congestion relief strategy. This strategy is also known as temporary shoulder use or hard shoulder running, and is typically implemented on freeways. Part-time shoulder use is a transportation system management and operations (TSM&O) strategy that uses...

Pages