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., 01/17/2022
E.g., 01/17/2022
Monday, January 17, 2022 - 15:30
The ultimate objective of this project was to determine the structural performance of the dynamic message sign (DMS) bonded with chemical adhesive in terms of ultimate strength and fatigue strength. To achieve this objective, this project first investigated the effects of various parameters (i.e., conditioning humidity and conditioning temperature) on tensile,...
Monday, January 17, 2022 - 15:30
This project investigated the influence of intersection corner radius on pedestrian crashes and right-turn vehicle speed. The corner radius can be unique to each corner at an intersection; therefore, this study assigned crashes to an intersection corner rather than to the entire intersection. For corner-level pedestrian crashes, the following variables were...
Monday, January 17, 2022 - 15:15
During the last 20 years, the Federal Aviation Administration made significant efforts to develop one of the most comprehensive specifications to prevent alkali-silica reaction (ASR) in new construction [see the Advisory Circular (AC) 150/5370-10H, Item P-501]. The AC was effective, to a large extent, in preventing ASR in new airport pavements during the last...
Monday, January 17, 2022 - 15:15
The Federal Highway Administration (FHWA) Roadway Safety Data Program is working with State and local agencies to develop case studies around roadway safety data collection, management, and analysis issues. These case studies help illuminate both the challenges that agencies encounter on data issues and the solutions they are implementing to address those...
Monday, January 10, 2022 - 15:45
As of January 1, 2021 the City of Chicago has 162 automated speed enforcement cameras deployed at 69 child safety zones with 96 cameras enforcing speed in one direction of travel, and 66 cameras enforcing speed in both directions of travel. 85 cameras were deployed at 40 park zones; 77 cameras were deployed at 29 school zones. For this analysis, two single-...
Monday, January 10, 2022 - 15:45
Geogrids have been widely used in roadway construction as reinforcement in pavement foundations. Geogrids have been effective in practice for reducing rutting damage, distributing traffic loads within the pavement foundation layers, increasing the resilient modulus of the base course, and stabilizing the subgrade layer. For this project, an integrated mobile...
Monday, January 10, 2022 - 15:45
Alternative intersection designs can improve traffic operations and safety but may be confusing to drivers due to turn prohibitions at intersections, such that drivers may be unaware where they can make a U-turn. Some alternative designs include median U-turns (MUT), restricted crossing U-turns (RCUT), J-turns, and through U-turns (ThrU). Each intersection type...
Monday, January 10, 2022 - 15:30
This report describes a study conducted to evaluate the performance and quantify the potential environmental benefits of recycled asphalt pavement projects completed in Virginia. The performance of the recycled projects was assessed by evaluating collected stiffness data and by the development of performance prediction models based on data obtained from the...
Monday, January 10, 2022 - 15:30
Risk management is the central element of the safety management system (SMS). Identifying, assessing, analyzing, mitigating, communicating, and documenting are all steps in an effective risk management program. The TRB Transit Cooperative Research Program's TCRP Synthesis 157: Transit Safety Risk Assessment Methodologies is designed to help the transit...
Monday, January 10, 2022 - 15:30
The Pedestrian and Bicycle Crash Analysis Tool (PBCAT) Version 3.0 is the latest iteration of a tool that helps road safety professionals improve crash data about nonmotorist crashes to better understand and address nonmotorist road user safety risks. PBCAT assists agencies in categorizing or crash typing nonmotorist road user crashes and is now in its third...
Monday, January 10, 2022 - 15:30
Traffic management systems (TMSs) and their operating centers, traffic management centers, support real-time and offline functions, services, actions, and activities—as well as related tasks and decisions (e.g., administrative actions and condition reports). In this context, decision-support tools (DSTs) are not generally used as standalone solutions;...
Monday, January 10, 2022 - 15:15
The research studied the possibility of harnessing solar energy through right-of-way associated structures, such as noise barriers and snow fences. A detailed survey was conducted with the general public, farmers, and utility companies to determine their acceptance of such an initiative. A large percentage of the general public, farmers, and utility companies...

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