Mercredi, 15 Avril, 2020 - 13:30
Researchers at California Partners for Advanced Transportation Technology (PATH), a research and development program at the University of California-Berkeley, studied the potential benefits of cooperative adaptive cruise control (CACC) by deploying the technology in a platoon of three trucks. They built the CACC system and implemented it in three long-haul...
Mercredi, 15 Avril, 2020 - 13:30
It can be expected that connected vehicles (CVs) systems will soon go beyond testbed and appear in real-world applications. To accommodate a large number of connected vehicles on the roads, traffic signal control systems on signalized arterials would require supports of various components such as roadside infrastructure, vehicle on-board devices, an effective...
Mercredi, 15 Avril, 2020 - 13:15
This report describes the methodologies and datasets used to prepare a set of data reductions that supported analyses of speeding behavior as discussed in the Findings Report from the same study (Richard, Lee, Brown, & Landgraf, 2019). Importantly, it is intended to be a guide that provides helpful insights for researchers to use when navigating the process...
Mercredi, 15 Avril, 2020 - 13:15
Speeding-related crashes continue to be a serious problem in the United States and attempts to address this problem through a variety of approaches have not led to a substantial reduction in speed-related fatalities. A better understanding of speeding behavior is needed to inform the development of new speeding countermeasures. To address this issue,...
Mercredi, 15 Avril, 2020 - 13:15
Researchers at the University of Nevada, Reno explored the feasibility of a self-sensing adaptive bridge bearing system. In this system, rubber bearings and sensors made of a magnetorheological elastomer (MRE) (or controllable rubber) respond to loads and vibrations through automated changes in stiffness. The system has a wireless, self-sensing capability that...
Lundi, 6 Avril, 2020 - 13:45
The objective of this research was to examine the link between driving speed and crash experience on roadway segments, taking into account roadway characteristics that influence speed and crash frequency and severity. A potential outcome of the research was improved safety performance functions that included a speed term or crash modification factors (CMFs)...
Lundi, 6 Avril, 2020 - 13:45
Corrosion of prestressed concrete reinforcement in bridge components is a major concern for state transportation agencies. The severity of the problem is amplified by the fact that the corrosion-induced damage in concrete reinforcement often does not show up on the surface until significant propagation has occurred. Moreover, prestressed reinforcement can...
Lundi, 6 Avril, 2020 - 13:45
This study combined multiple approaches to evaluate the structural and economic impact of using new-generation wide-base tires (NG-WBT) in New Brunswick, Canada. A three-dimensional finite-element model of a typical pavement structure was used to predict critical pavement responses. The model included measured tire-pavement contact forces among other variables...
Lundi, 6 Avril, 2020 - 13:30
This handbook presents a methodology that will aid highway asset owners and maintenance personnel with determining what assets, beyond pavements and bridges, are most important to support their agencies' missions and goals. The methodology prioritizes asset classes and identifies data related to those assets that best support a performance-based approach to...
Lundi, 6 Avril, 2020 - 13:30
The Virginia Department of Transportation (VDOT) has purchased a subscription to the StreetLight (SL) Data products that mainly offer origin-destination (OD) related metrics through crowdsourcing data. Users can manipulate a data source like this to quickly estimate origin-destination trip tables. Nonetheless, the SL metrics heavily rely on the data points...
Lundi, 6 Avril, 2020 - 13:30
Our project was based on the need to water new roadside installations more efficiently to ensure that the turfgrasses, especially the new salt-tolerant mixes, establish more successfully with a predictable and uniform amount of water during the establishment period. The first objective of this project was to do a preliminary investigation of alternative means...
Lundi, 30 Mars, 2020 - 17:45
The Federal Highway Administration mandates that all [bridge] structures in its inventory are to be inspected every two years. Consequently, deck surveys are conducted to identify unseen damage within them. A significant number of bridges in Virginia have concrete decks with an overlay. Methods commonly deployed on these decks, are limited in the quantitative...
