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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 5441 - 5460 of 36022 results
  • Further Technology Readiness of RealTime Asphalt Mixture Compaction Monitoring
    Further Technology Readiness of Real-Time Asphalt Mixture Compaction Monitoring
    Crockford, Bill ;
    Liu, Wenting
    2019-08-19 | PDF
    Goals: Develop use of compaction monitoring system (CMS) for evaluation density under the breakdown roller. Using a compaction index (CI) concept. Identify key factors influencing the CI model. Develop updated factors, particularly for temperature and vibration. Identify how CMS could be used for process control or assurance.
  • Blockchain A Safe Efficient Solution for Driver Privacy and Connected Vehicle Transportation Data Sharing
    Blockchain: A Safe, Efficient Solution for Driver Privacy and Connected Vehicle Transportation Data Sharing
    Cao, Yingxi ;
    Kurkcu, Abdullah
    2019-08-16 | PDF
    Connected and automated vehicles (CAVs) are becoming increasingly prevalent, bringing with them potential for better safety and mobility. However, these vehicles can create many thousands of transactions in a flash, creating a challenge for current technologies that are not capable of transmitting such big data, privately, and securely. Distributed ...
  • Operational Safety of Gravel Roads in Rural and Tribal Communities Vulnerability to Structural Failures and GeoHazards
    Operational Safety of Gravel Roads in Rural and Tribal Communities: Vulnerability to Structural Failures and Geo-Hazards
    Ibrahim, Ahmed ;
    Sharma, Sunil
    2019-08-15 | PDF
    Of the 4.1 million miles of federal and state highways in the U.S., 2.2 million miles (or 54%) are unpaved, gravel roads. In the Pacific Northwest and Alaska, unpaved gravel roads provide critical transportation access, with some communities relying on just a single highway for access into and out of town. In such cases, these highways become a cri ...
  • Development of Accurate Damping Models for Nonlinear Time History Analysis
    Development of Accurate Damping Models for Nonlinear Time History Analysis
    Taciroglu, Ertugrul ;
    Ghahari, S Farid
    2019-08-14 | PDF
    California’s bridges provide vital transportation links, and their seismic performance impacts the entire state and thus, the nation. In order to accurately estimate the response of bridges under earthquake ground motions, highly detailed and accurate Finite Element (FE) models are necessary. While the nonlinear behaviors of most elements can be ca ...
  • Enhancing School Zone Safety: Case Studies in Puerto Rico Using Driving Simulation [supporting datasets]
    Valdes Diaz, Didier M. ;
    Colucci Rios, Benjamin
    2019-08-07 | ZIP
    The objective of this research was to evaluate driver behavior when approaching a school zone and the effectiveness of a new combination of road signage and pavement markings. The strategy behind the use of new traffic control devices (TCDs) in the driving simulator was to evaluate their effectiveness in controlling drivers’ speeds. Two school zone ...
    Dataset Supporting Files
  • Evaluation of Safety Enhancements in School Zones with Familiar and Unfamiliar Drivers supporting datasets
    Evaluation of Safety Enhancements in School Zones with Familiar and Unfamiliar Drivers [supporting datasets]
    Valdes Diaz, Didier M. ;
    Knodler, Michael A.
    2019-08-07 | ZIP
    Traffic crashes in suburban school zones pose a serious safety concern due to a higher presence of school-age pedestrians and cyclists as well as potential speeding issues. A study that investigated speed selection and driver behavior in school zones was carried out using two populations from different topographical and cultural settings: Puerto Ri ...
  • Urban LastMile Transportation 40
    Urban Last-Mile Transportation 4.0
    Winkenbach, Matthias ;
    Sheffi, Yossi
    2019-08-07 | PDF
    With the rise of the on-demand economy and the increasingly high service levels expected by consumers, companies are racing to provide shorter and shorter delivery lead times for ecommerce orders. Two-day deliveries have become the norm in dense urban areas and companies are developing highly responsive urban distribution networks capable of servin ...
  • Developing an Open-Source Multi-Agent Simulation Environment for Connected Autonomous Vehicles [supporting datasets]
    Negrut, Dan ;
    Serban, Radu
    2019-08-06 | ZIP
    This document contains an overview of the software infrastructure developed under the SAFER-SIM project “Developing an Open Source Multi-Agent Simulation Environment for Connected Autonomous Vehicles”. We provide a description of the four foundational simulation elements – agent dynamics, sensing, communication, and virtual worlds – that anchor Syn ...
    Dataset
  • Safely and Effectively Communicating Non-Connected Vehicle Information to Connected Vehicles through Field- and Driving-Simulator-Based Research [supporting datasets]
    Noyce, David A. ;
    Riehl, Jon
    2019-08-06 | ZIP
    The largest safety impact of connected vehicle (CV) technology will occur only when a critical mass of vehicles and infrastructure is connected. This will require significant market penetration and improvements to our infrastructure, and it is occurring at a relatively slow pace compared to autonomous vehicle technology. Until CVs are ubiquitous, s ...
    Dataset
  • Identifying Roadway Physical Characteristics that Contribute to Emissions Differences between Hybrid and Conventional Vehicles [supporting dataset]
    Sullivan, James ;
    Sentoff, Karen
    2019-08-03 | ZIP
    In this study, a second-by-second (SbS) data set obtained from monitoring vehicle emissions over a series of 75 test runs from 2 test vehicles (a conventional vehicle (CV) and a hybrid-electric vehicle (HEV)) over an 18-month period in 2010-2011 during real-world on-road operations on a specified 32-mile route in Chittenden County, Vermont was used ...
    Dataset Supporting Files
  • Aerial Contact Sensing for Improved Inspection of Transportation Infrastructure
    Aerial Contact Sensing for Improved Inspection of Transportation Infrastructure
    Scherer, Sebastian
    ORCID ICON IMG
    2019-08-01 | PDF
    The current state-of-the-art in using remotely controlled or small unmanned aerial systems (sUAS) for bridge inspection focuses only on taking visual measurements from a distance of many meters. This is not a sufficient substitute for the inspection made via contact sensing by a human inspector. Furthermore, these systems often require global posit ...
  • Investigating the Impact of Distracted Driving among Different SocioDemographic Groups
    Investigating the Impact of Distracted Driving among Different Socio-Demographic Groups
    Jeihani, Mansoureh ;
    Ahangari, Samira
    2019-08-01 | PDF
    Previous studies examined the detrimental impact of distracted driving on safety; however, the effect of different types of distraction accompanied by different road classes has not been investigated. This study used a high-fidelity driving simulator and an eye-tracking system to examine the driving behavior of young participants while engaged in v ...
  • Calibration of the AASHTOWare Pavement ME Design Software for PCC Pavements in Idaho
    Calibration of the AASHTOWare Pavement ME Design Software for PCC Pavements in Idaho
    Bayomy, Fouad ;
    Muftah, Ahmed
    2019-08-01 | PDF
    The performance prediction models incorporated in the AASHTOWare Pavement ME Design (PMED) software are calibrated using data obtained from the Long-Term Pavement Performance (LTPP) program. The nationally calibrated models are to be evaluated to determine whether they accurately predict field performance for local conditions. Otherwise, some pavem ...
  • Investigation of DSR Test Methods To Determine Binder Low Temperature Properties
    Investigation of DSR Test Methods To Determine Binder Low Temperature Properties
    Kommidi, Santosh Reddy ;
    Kim, Yong-Rak
    2019-08-01 | PDF
    The low temperature rheology of bituminous binders is of great interest because low temperature cracking is one of the primary asphalt pavement failure modes observed in cold-climate places such as Nebraska. Low temperature binder characterization/grading has been primarily conducted using the bending beam rheometer (BBR), while the dynamic shear r ...
  • SCDOT Asset Data Collection Assessment
    SCDOT Asset Data Collection Assessment
    Ogle, Jennifer H ;
    Sarasua, Wayne A.
    2019-08-01 | PDF
    The MAP-21/FAST Act requires state departments of transportation to transition to data driven, performance and outcome-based programming, which has required states across the nation to revisit their data collection and maintenance efforts. This report documents research to ensure that the future SCDOT database specifications and data collection eff ...
  • Florida Airport Sustainability TrackingMonitoring System
    Florida Airport Sustainability Tracking/Monitoring System
    Zhang, Yu ;
    Siwinski, Benjamin
    2019-08-01 | PDF
    Tracking and monitoring airport sustainability performance is an essential component of an airport's sustainability program development process and also the foundation for continuous development of airport systems. This study identified airport sustainability performance metrics under the Economic Vitality, Operational Efficiency, Natural Resources ...
  • A Construction Project Classification Framework Mapping the Dimensions for Classification of Pacific Northwest Highway Project Types
    A Construction Project Classification Framework: Mapping the Dimensions for Classification of Pacific Northwest Highway Project Types
    Okere, George O
    2019-08-01 | PDF
    In the construction industry, it is an accepted fact that not all projects are created equal, so analysis and evaluation of project performance should follow the same principle. Gaining insights into contract performance requires practitioners to compare project performance on various dimensions, look for patterns, and make generalizations. In cont ...
  • Pedestrians and Bicyclists Count Developing a Statewide Multimodal Count Program
    Pedestrians and Bicyclists Count: Developing a Statewide Multimodal Count Program
    Tolford, Tara M. ;
    Izadi, Maryam
    2019-08-01 | PDF
    The purpose of this study was to research best practices and available methods and technologies for measuring active transportation activity, in order to provide the Louisiana Department of Transportation and Development (DOTD) with needed information in support of the development of an efficient, cost-effective bicycle and pedestrian count program ...
    Supporting Files
  • Cost and Profitability Analysis of a Prospective Pennycress to Sustainable Aviation Fuel Supply Chain in Southern USA
    Cost and Profitability Analysis of a Prospective Pennycress to Sustainable Aviation Fuel Supply Chain in Southern USA
    Trejo-Pech, Carlos Omar ;
    Larson, James A
    2019-08-01 | PDF
    This study evaluates biorefinery bio-oil feedstock costs at the plant gate for a prospective field pennycress (Thlaspi arvense L.) to sustainable aviation fuel (SAF) supply chain. The biorefinery would supply SAF to the Nashville, Tennessee international airport. Supply chain activities include pennycress production, transporting oilseed to a crush ...
  • Traffic Queue Prediction and Warning System
    Traffic Queue Prediction and Warning System
    Liu, Yuandong ;
    Bae, Bumjoon
    2019-08-01 | PDF
    The purpose of the study was to explore and develop analytical models and field-data based algorithms for the identification or detection of the “end-of-queue” (EOQ) in freeway incident or congestion situations. TDOT’s real-time ITS traffic data was the primary basis for this study, so the algorithms could be verified in the field and deployed in t ...
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