Tuesday, April 5, 2022 - 19:30
This manual describes operational procedures for collecting longitudinal profile, macrotexture, and transverse profile data for the Long-Term Pavement Performance program using a High-Speed Survey Vehicle. This manual also contains procedures for measuring the longitudinal and transverse profiles of the pavement using a Dipstick® and the longitudinal...
Tuesday, April 5, 2022 - 19:30
Quality assurance (QA) and other construction data contain information about quality of materials and construction that can potentially serve as leading indicators of pavement performance. This project evaluated approaches to integrate QA and construction data into an agency's pavement management system (PMS) for improving performance forecasting models. It...
Tuesday, April 5, 2022 - 19:30
Pedestrians are vulnerable road users since they are prone to more severe injuries in any vehicular collision. While innovative solutions promise improved pedestrian safety, a careful analysis of local conditions is required before selecting proper corrective measures. This research study had two focuses: (1) methodology to identify roads and areas in Indiana...
Monday, March 21, 2022 - 21:00
Accurately modeling the realistic and unstable traffic dynamics of human-driven traffic flow is crucial to being able to understand how traffic dynamics evolve, and how new agents such as autonomous vehicles might influence traffic flow stability. This work is motivated by a recent dataset that allows us to calibrate accurate models, specifically in conditions...
Monday, March 21, 2022 - 20:45
A research investigation was conducted on the erosion potential of stabilized subbases under concrete pavements and asphalt layers supporting concrete overlays. Through field surveys and testing in Illinois, this project evaluated if existing concrete pavements with stabilized subbases and concrete overlays were exhibiting potential erosion of the underlying...
Monday, March 21, 2022 - 20:45
This report explores the issues public authorities must address when establishing data-reporting mandates and policies. Transport systems and the people using them generate an ever-increasing amount of data which can help improve transport system performance. The risks from missing or overly broad reporting policies can be mitigated by following reporting...
Monday, March 21, 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...
Monday, February 7, 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...
Monday, February 7, 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...
Monday, February 7, 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...
Monday, January 24, 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...
Monday, January 24, 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),...
