Mardi, 26 Avril, 2022 - 15:45
Approximately 1,282 fatalities on U.S. interstate highways in 2020 were due to nighttime road departures. A new ultra-bright retroreflective lane marking tape can save lives as well as offer both a very short payback period and a very substantial benefit/cost ratio over its useful lifetime.
The TRB IDEA (Innovations Deserving Exploratory Analysis) Program...
Mardi, 26 Avril, 2022 - 15:30
Superloads (SLs) are a class of vehicles that typically exceed both gross vehicle weight limits and axle load limits, in addition to occupying two or more lanes of traffic. In PA, SLs require special permits but their effect on pavement distresses have not been evaluated. In this study, lab and computational analyses were combined to quantify the effect of SLs...
Lundi, 11 Avril, 2022 - 15:00
This study investigates the performance benefits of synthetic structural fibers in mitigating distresses in thin concrete pavements and overlays. In this study, two ultra-thin (3 and 4 inches thick) and four thin (5 and 6 inches thick) concrete pavements placed on a gravel base along with two thin unbonded concrete overlay cells (5 inches thick) placed on an...
Mardi, 5 Avril, 2022 - 20:00
Micromobility is an innovative transportation strategy that has demonstrated a great potential for congestion mitigation. However, the research on micromobility is very limited in the field of transportation. This project aims to conduct a comprehensive study to analyze, quantify, and understand the impacts of micromobility on congestion reduction and recommend...
Mardi, 5 Avril, 2022 - 19:45
This report presents the findings from a study examining the current reference wheelchair standard and the characteristics, prevalence and use of wheeled mobility aids.
The research provides information to help understand if, and how, the current standard may need to evolve. It considers options for the use of the reference wheelchair standard in the...
Mardi, 5 Avril, 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...
Mardi, 5 Avril, 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...
Mardi, 5 Avril, 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...
Lundi, 21 Mars, 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...
Lundi, 21 Mars, 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...
Lundi, 21 Mars, 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...
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...
