Lundi, 21 Mars, 2022 - 20:45
Many technical and institutional issues related to estimating and reducing greenhouse gas emissions (GHGs) lie across a wide spectrum of the activities undertaken by state departments of transportation (DOTs).The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 308: Methods for State DOTs to Reduce Greenhouse Gas Emissions from...
Lundi, 7 Février, 2022 - 16:30
This report documents a project to develop a new laboratory fatigue relationship to predict the performance of foamed bitumen stabilised (FBS) materials.
The project focused on extensive laboratory experiments including indirect tensile testing and flexural testing to determine the modulus, strength, and fatigue characteristics of FBS samples prepared and...
Lundi, 7 Février, 2022 - 16:15
The Federal Highway Administration (FHWA) and the Traffic Analysis and Simulation Pooled Fund Study sponsored a research project on multiresolution modeling (MRM). The project intended to develop consistent definitions and a unified modeling framework for MRM to help transportation professionals better understand opportunities and challenges associated with MRM...
Lundi, 7 Février, 2022 - 16:15
This report develops and verifies material and structural models for asphalt mixture performance-related specifications (AM-PRS). The models the research team developed and verified in this study include the simplified viscoelastic continuum damage (S-VECD) model for fatigue cracking, the shift model as a permanent deformation model, the healing model based on...
Lundi, 24 Janvier, 2022 - 16:15
This report is part of the Human Factors for Connected Vehicles (HFCV) program, whose goal is to minimize driver workload by eliminating connected vehicle (CV) device-related distractions. The research described in this document is part of an effort to develop initial design considerations for vehicle-to-pedestrian (V2P) safety messages provided to drivers via...
Lundi, 24 Janvier, 2022 - 16:15
This Roadside Unit (RSU) Standard v01 supersedes USDOT's Dedicated Short-Range Communications Roadside Unit Specifications v4.1. This RSU Standard v01 was developed by engaging with stakeholders representing the stakeholder community at large, including but not limited to infrastructure owner operators, automobile original equipment manufacturers (OEMs),...
Lundi, 24 Janvier, 2022 - 16:00
Part 2 of the "Use of recycled materials in pavements" international seminar co-organised with @AACarreteras, with case studies from different parts of the world on the subject. The presentations can be viewed on YouTube at https://www.youtube.com/watch?v=9AvzyQSOerU
Lundi, 24 Janvier, 2022 - 16:00
Limited transport options in rural and remote areas hinder access to basic services, jobs and social activities. This report presents international best practices and recommendations for transport provision in communities where conventional public transport is difficult to sustain. It examines how sustainable accessibility for people without access to a car...
Lundi, 24 Janvier, 2022 - 16:00
During the winter season, snowmobile riders in many jurisdictions use trails that are usually managed and maintained by snowmobile clubs and associations. The problem lies when these trails intersect with vehicular highways or paved park trails owned and maintained by a public agency. A single crossing can see thousands of snowmobiles in a single season, which...
Lundi, 24 Janvier, 2022 - 15:45
Public agencies benefit from measuring their performance as it helps to focus employee and organizational activities. State departments of transportation have become more performance-oriented over the past two decades and routinely collect data on highway safety, infrastructure condition, system operations, project delivery, winter maintenance, transit, bicycle...
Lundi, 17 Janvier, 2022 - 15:45
Traffic speed deflection devices (TSDDs) are designed to measure pavement deflections or deflection velocities in response to loads applied by trucks moving at or near prevailing traffic speeds.
TRB's Transportation Research Circular E-C276: State Departments of Transportation Experiences and Applications with Traffic Speed Deflection Devices details a...
Lundi, 17 Janvier, 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,...
