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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 5261 - 5280 of 36958 results
  • Developing and Testing an ECOCooperative Adaptive Cruise Control System for Buses
    Developing and Testing an ECO-Cooperative Adaptive Cruise Control System for Buses
    Chen, Hao ;
    Rakha, Hesham A.
    2020-03-01 | PDF
    Studies over the past decade have shown that eco-driving systems which provide speed advisories to drivers/vehicles using data received via vehicle-to-infrastructure and vehicle-to-vehicle communications can help improve traffic mobility and reduce vehicle energy and emission levels. This study extends the Eco-Cooperative Adaptive Cruise Control (E ...
  • Performance of Wicking Geotextile on Mitigating Water Pumping Issue on I44 Highway
    Performance of Wicking Geotextile on Mitigating Water Pumping Issue on I-44 Highway
    Zhang, Xiong ;
    Galinmoghadam, Javad
    2020-03-01 | PDF
    Water within pavement layers is the major cause of pavement distresses. An increase in pore water pressure caused by traffic loadscauses fine particles of subgrade and subbase to migrate to base course layer. This migration results in the formation of void spacesand reduction in support of the pavement. On the other hand, migrated fines may clog th ...
  • Determining the Effect of Smartphone Alerts and Warnings on Older-Adult Street-Crossing Behavior [supporting datasets]
    Rector, Kyle ;
    Kearney, Joseph K.
    2020-03-01 | PDF
    Research has shown that older pedestrians have more difficulty making road-crossing decisions than younger adults. This presents an opportunity for vehicle-to-pedestrian (V2P) communication to assist older adults’ street-crossing decisions. We developed ability-based permissive alerts (safe to cross) and prohibitive warnings (not safe to cross) for ...
    Dataset Supporting Files
  • Field Testing and LongTerm Monitoring of Selected HighMast Lighting Towers
    Field Testing and Long-Term Monitoring of Selected High-Mast Lighting Towers
    Lloyd, Jason B ;
    Connor, Robert J.
    2020-03-01 | PDF
    Four high-mast lighting towers (HMLTs) were instrumented with sensors to monitor weather and structural response to wind-induced vibrations. The four HMLTs were in different locales within the state of Wyoming, each site being selected specifically due to a history of failed HMLTs at those locations, or nearby. Several HMLTs have failed in recent y ...
  • RankOrdered Analysis of Consumer Preferences for the Attributes of a ValueAdded Biofuel CoProduct
    Rank-Ordered Analysis of Consumer Preferences for the Attributes of a Value-Added Biofuel Co-Product
    Choi, Yejun ;
    Lambert, Dayton M
    2020-03-01 | PDF
    Biochar is a co-product of the production of advanced biofuels that sequesters carbon when used as a soil amendment. Gardening consumers are a potential market for biochar and their purchase of biochar-amended products could provide biofuel producers with an additional revenue stream. To better understand this opportunity, preferences for the attri ...
  • Developing a Baseline for Customer Satisfaction in the Kentucky Transportation Cabinets Department of Vehicle Regulation
    Developing a Baseline for Customer Satisfaction in the Kentucky Transportation Cabinet’s Department of Vehicle Regulation
    Martin, Andrew ;
    Van Dyke, Chris
    2020-03-01 | PDF
    Among the Kentucky Transportation Cabinet’s (KYTC) business units, the Department of Vehicle Regulation (DVR) has the most interactions with members of the public and other government agencies. Given its high profile and public visibility, it is critical for the department to provide high-quality customer service. Lacking data on customer perceptio ...
  • Active Traffic Monitoring Through Large Scale Processing of Aerial Camera Array Networks
    Active Traffic Monitoring Through Large Scale Processing of Aerial Camera Array Networks
    Sarasua, Wayne A. ;
    Zhao, Xi
    2020-03-01 | PDF
    This research focuses on automated processing of video from a persistent surveillance camera array to extract traffic data from a 25 square mile area. In previous research, we developed an automated traffic surveillance system capable of processing aerial camera array imagery to extract valid and useful traffic data for diverse applications. In thi ...
  • Determining the Effect of Smartphone Alerts and Warnings on OlderAdult StreetCrossing Behavior
    Determining the Effect of Smartphone Alerts and Warnings on Older-Adult Street-Crossing Behavior
    Rector, Kyle ;
    Kearney, Joseph K.
    2020-03-01 | PDF
    Research has shown that older pedestrians have more difficulty making road-crossing decisions than younger adults. This presents an opportunity for vehicle-to-pedestrian (V2P) communication to assist older adults’ street-crossing decisions. The authors developed ability-based permissive alerts (safe to cross) and prohibitive warnings (not safe to c ...
  • Evaluate Modify and Adapt the ConcreteWorks Software for Iowas Use
    Evaluate, Modify, and Adapt the ConcreteWorks Software for Iowa’s Use
    Wang, Kejin ;
    Sargam, Yogiraj
    2020-03-01 | PDF
    The early-age thermal development in mass concrete has a significant impact on the performance and long-term serviceability of mass concrete structures, such as bridge foundations. Great efforts have been made on predicting and controlling the thermal development in mass concrete. ConcreteWorks has been increasingly used for this purpose. However, ...
  • Assessing the Impact of Federal Requirements on GDOT Project Portfolio Volume II
    Assessing the Impact of Federal Requirements on GDOT Project Portfolio, Volume II
    McKinsey & Company, Inc
    2020-03-01 | PDF
    This volume is the second in a series. The other volume in the series is: FHWA-GA-20-1918 Volume I: Assessing the Impact of Federal Requirements on GDOT Project Portfolio – Volume I The Georgia Department of Transportation (GDOT) is responsible for the state’s roads, bridges, interstate highways and other modes of transportation. In 2015, Georgia H ...
  • Extended Field Testing and Enhancement of a Portable Pedestrian and Cyclist Detection System
    Extended Field Testing and Enhancement of a Portable Pedestrian and Cyclist Detection System
    Usher, Colin ;
    Daley, Wayne
    2020-03-01 | PDF
    The objective of this project was to enhance the capabilities of the pedestrian tracking system by adding support for detection and tracking of cyclists and vehicles, in addition to generating a set of tools to aid in analysis. Secondary tasks explored methods of enhancing the system capability for added value. The system analyzes the collected vid ...
  • The Exploratory Advanced Research Program Fact Sheet Mobile Device Data for OriginDestination Travel Trends
    The Exploratory Advanced Research Program Fact Sheet: Mobile Device Data for Origin-Destination Travel Trends
    United States. Federal Highway Administration
    2020-03-01 | PDF
    For the project “Data Analytics and Modeling Methods for Tracking and Predicting Origin-Destination Travel Trends Based on Mobile Device Data,” the Maryland Transportation Institute (MTI) at the University of Maryland worked with data provider partners such as mobile phone companies to determine if accurate and reliable origin-destination (OD) prod ...
  • Evaluation of Innovative Alternative Intersection Designs in the Development of Safety Performance Functions and Crash Modification Factors
    Evaluation of Innovative Alternative Intersection Designs in the Development of Safety Performance Functions and Crash Modification Factors
    Abdel-Aty, Mohamed A. ;
    Lee, Jaeyoung
    2020-03-01 | PDF
    Many alternative intersections aim to reduce conflict points by separating turning vehicles (left-turning vehicles in most cases) at intersections. In order to investigate the safety effects of alternative intersections, data were collected from 27 states, including Arizona, Colorado, Florida, Georgia, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisi ...
  • Macroscopic Fundamental Diagram Approach to Traffic Flow With AutonomousConnected Vehicles
    Macroscopic Fundamental Diagram Approach to Traffic Flow With Autonomous/Connected Vehicles
    Whalin, Robert W ;
    Hu, Guojing
    2020-03-01 | PDF
    Connected and autonomous vehicles (CAVs) have the capability to acquire real-time information from each other while human-driven vehicles (HVs) are standalone in the vehicle roadway navigation system. The information asymmetry poses great challenges in managing and controlling vehicles in the mixed traffic. To address such challenges, a new lane-ch ...
  • Public Transportation Safety Among University Students
    Public Transportation Safety Among University Students
    Loukaitou-Sideris, Anastasia ;
    Brozen, Madeline
    2020-03-01 | PDF
    This study focuses on the sexual harassment experiences of university students during their public transit journeys. We focus on university students because this group is typically more transit dependent than the general public, and possibly because of their age, more vulnerable to victimization from sexual harassment than other adults. Focusing on ...
  • The Exploratory Advanced Research Program Fact Sheet Safer More Reliable Transportation With Behavioral Economics Cellphone Use and Managed Lane Choice
    The Exploratory Advanced Research Program Fact Sheet: Safer, More Reliable Transportation With Behavioral Economics: Cellphone Use and Managed Lane Choice
    United States. Federal Highway Administration. Office of Safety Research and Development
    2020-03-01 | PDF
    Behavioral economics draws on insights from integrating psychology and economics to better understand human decisionmaking. Understanding cognitive biases and heuristics—such as loss aversion and present bias—may help policy makers predict human behavior and facilitate choices that support public benefits by avoiding suboptimal outcomes. Behavioral ...
  • Evaluation of Freight and Transit Signal Priority Strategies in MultiModal Corridor for Improving Transit Service Reliability and Efficiency
    Evaluation of Freight and Transit Signal Priority Strategies in Multi-Modal Corridor for Improving Transit Service Reliability and Efficiency
    Kaisar, Evangelos I. ;
    Hadi, Mohammad
    2020-03-01 | PDF
    The rise in freight movements in metropolitan areas can be regarded as one of the crucial concerns of the near future. Traffic congestion attributed to elevated freight flows impacts both private and public vehicle operations. Therefore, it is of considerable significance to reduce congestion on multimodal routes with heavy freight and transit volu ...
  • The Exploratory Advanced Research Program Fact Sheet New Transportation Simulation Technology for Safer Roadways
    The Exploratory Advanced Research Program Fact Sheet: New Transportation Simulation Technology for Safer Roadways
    United States. Federal Highway Administration
    2020-03-01 | PDF
    American roadways are becoming increasingly complicated and crowded as varying types of motorists and pedestrians share space. Motorists and pedestrians now must pay attention to newer vehicles such as autonomous vehicles (AVs) and e-scooters. State and local governments are seeking ways to design and operate roadways to include connected and autom ...
  • CorrosionResistant Stainless Steel Strands for Prestressed Bridge Piles in Marine Atmospheric Environments
    Corrosion-Resistant Stainless Steel Strands for Prestressed Bridge Piles in Marine Atmospheric Environments
    Troconis, B C Rincon ;
    Sharp, Stephen R
    2020-03-01 | PDF
    This study demonstrated that Type 2205 stainless steel strand can be used as a replacement for conventional ASTM A416 steel strands where an increase in service life is required. The benefit and practicality of using Type 2205 stainless steel strand in prestressed piles were determined from two tasks performed in this study. First, a corrosion asse ...
  • Seismic Behavior of Grade 80 RC Bridge Columns Phase 1 and Critical Bending Strain of Longitudinal Reinforcement
    Seismic Behavior of Grade 80 RC Bridge Columns – Phase 1 and Critical Bending Strain of Longitudinal Reinforcement
    Barcley, Leo ;
    Kowalsky, Mervyn J.
    2020-03-01 | PDF
    Modern seismic design relies on the principles of capacity design wherein certain structural members are chosen as plastic hinge members. In reinforced concrete, the choice of reinforcement is crucial for desirable performance of plastic hinge members. Current design codes specify a maximum yield strength of 60 ksi (Grade 60) for reinforcement used ...
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