Lundi, 25 Janvier, 2021 - 15:30
asPECT provides a methodology to calculate the life cycle greenhouse gas emissions or ‘carbon footprint’ of asphalt used in highways. The tool and supporting docuemntation is available from the UK Transportation Research Laboratory (TRL) web site at https://trl.co.uk/permanent-landing-pages/asphalt-pavement-embodied-carbon-tool-aspect/...
Lundi, 25 Janvier, 2021 - 15:15
Automated driving systems (ADS) have the potential to fundamentally change transportation, and a growing number of these systems have entered the market and are currently in use on public roadways. However, drivers may not use ADS as intended due to misunderstandings about system capabilities and limitations. Moreover, the real-world use and effects of this...
Lundi, 25 Janvier, 2021 - 15:15
Compaction is one of the most important factors that affects the durability of asphalt pavements. Many studies have been focused on developing methods to improve compaction. Previously, the authors found that the addition of small percentages of Graphite Nanoplatelets (GNPs) significantly increase the compactability of asphalt mixture. Traditional viscosity...
Lundi, 18 Janvier, 2021 - 20:30
The main goal of this project was to identify focus crash and facility types (FCFTs) and associated contributing factors to better inform applications of systemic safety improvements. The selection of FCFTs was guided by the use of the Fatality Analysis Reporting System and the Highway Safety Information System (HSIS) databases (NHTSA 2018a; FHWA 2018c). The...
Lundi, 18 Janvier, 2021 - 20:15
This document serves as a quick reference guide for transportation professionals in State and local agencies that are interested in applying a systemic approach to road-safety management. This guide provides brief overviews of the systemic approach, common target crash types and their associated facility types, and contributing factors. It also provides a six-...
Lundi, 18 Janvier, 2021 - 20:15
The transportation-engineering community is transforming by integrating quantitative methods into the task development process. This report identifies opportunities to better understand the relationships between road safety and factors that affect traffic-crash occurrence and severity. In this report, current statistical-analysis methods and data sources used...
Lundi, 18 Janvier, 2021 - 20:00
This project established protocols to help evaluate the utilization of chemical stabilization methods to potentially improve the engineering behavior of problematic soils with and without soluble sulfates within the state of Montana. In addition, construction life cycle cost analyses were used to compare existing approaches used by MDT versus chemical...
Lundi, 18 Janvier, 2021 - 20:00
Nineteen state highway locations around south-central and southwestern Minnesota were evaluated during winter 2019-20 for the application of deicer “hot shots,” extra levels of salt or other chemical treatments used to deice roadways and maintain roadway driving levels of performance. Locations were selected based on previous recordkeeping that...
Lundi, 18 Janvier, 2021 - 19:45
The density and air void content of asphalt mixtures affect the durability and performance of asphalt pavements. Pavement longitudinal joints typically have a lower density than the mat because they receive less compaction than the center section of the mat for various reasons. The higher air void percentages resulting from lower densities can lead to high...
Lundi, 18 Janvier, 2021 - 19:45
This report was largely prepared in 2019 and early 2020 before the novel coronavirus that causes COVID-19 struck the United States. Economic shutdowns and social distancing measures were put in place in multiple cities and states beginning in March 2020 to ...
Lundi, 18 Janvier, 2021 - 19:45
This report explores the accessibility challenges that people face in remote areas. It demonstrates how state support can ensure access to essential services and reduce social and economic isolation where private markets fail to provide adequate transport connections. It provides a classification of policy interventions in different countries and reviews common...
Lundi, 11 Janvier, 2021 - 16:00
Management of traffic signal systems is a critical function for many transportation agencies. Thanks to advancements in technology, it is now possible to collect large amounts of data at signalized intersections, leading to the development of dozens of performance measures.
The TRB National Cooperative Highway Research Program's NCHRP Research Report...
