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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., 09/23/2017
E.g., 09/23/2017
Wednesday, February 3, 2016 - 20:30
Minnesota county engineers have sometimes observed heaves and dips near centerline culverts during cold winter months. In these instances, during the late winter and early spring, the area where a culvert has been replaced does not heave or heaves only slightly, while the roadway on either side of the replaced culvert heaves. The heave and dip disappear...
Friday, January 29, 2016 - 16:15
Anecdotal information indicates that private investment and property value increases are associated with featured Complete Streets projects. However, to date, little research has been done to confirm these benefits. Much of the relevant literature focuses on very real and important improvements to the safety of all who use Complete Streets: pedestrians,...
Thursday, January 28, 2016 - 16:15
While pricing of managed lanes has been in place for over 20 years, most of the projects have been conversions of existing high-occupancy vehicle (HOV) lanes into high-occupancy-toll (HOT) lanes. These are the first generation projects. This primer explores the evolution of first-generation pricing strategies into more complex express toll lanes using new...
Thursday, January 28, 2016 - 16:15
Public agencies are required by state and federal laws to provide accessibility on their right-of-way (ROW). Failure of public agencies to provide accessibility on their ROW has resulted in costly settlements. Accordingly, the Illinois Department of Transportation (IDOT) needs to provide information for local public agencies, consultants, contractors, and IDOT...
Thursday, January 28, 2016 - 16:15
This report presents a consistent methodology to evaluate and report ITS asset performance from the road user perspective. It reviews current ITS performance evaluation practices amongst Austroads and road agencies. VicRoads methodology was adopted and generalised, and a five-step framework was established to retrieve, analyse and report on asset...
Wednesday, January 27, 2016 - 20:45
Rural communities cover much of the United States, but often grow at a slower rate than metropolitan areas. Smart growth approaches to development can help these places strengthen their economies while protecting their environment and residents’ health. For example, encouraging compact development allows people to drive less if they choose, reducing air...
Wednesday, January 27, 2016 - 20:30
This study evaluated alternatives to raised/non-traversable medians on driveways and approaches. Raised medians are often considered as an effective technique to limit direct left-turns that may be due to a significant number of conflict points. The raised medians provide an added benefit of improved corridor aesthetics. This research effort specifically...
Wednesday, January 27, 2016 - 20:15
TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 483: Training and Certification of Highway Maintenance Workers documents front-line maintenance worker training and certification practices for highway transportation agencies in the United States and Canada. The report includes the types of topics being addressed by training and...
Wednesday, January 27, 2016 - 20:15
This report assesses cycling in five of Canada’s largest cities: Toronto, Montreal, Vancouver, Calgary and Ottawa. It analyzes how well cycling networks serve residents in each of these cities, and how effectively each city has responded to the growth in cycling and the demand for safer and more accessible infrastructure that takes cyclists where they...
Wednesday, January 27, 2016 - 20:00
Various tests were performed to analyze the effectiveness of flared-end inlet protection products. The tests were conducted at the Erosion Control Research and Training Center (ECRTC) of the University of Illinois at Urbana-Champaign. These tests analyzed the ability of the products to prevent sediment from entering curb and gutter inlets via site runoff. The...
Wednesday, January 27, 2016 - 19:45
This document provides a review of approaches, methods, and tools that can be used to evaluate how freight improvements contribute to economic competitiveness and the cost of goods. The information within is intended to serve as a point of reference to assist practitioners, particularly state and regional transportation decision makers, in considering how...
Tuesday, January 26, 2016 - 20:15
Road Network Operations (RNO) concern the methods at the disposal of road authorities and highway infrastructure operators that contribute to safer and more efficient travel for road users and for society as a whole. This includes techniques such as traffic incident detection, incident management, traffic control (urban and inter-urban), traveller information (...

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