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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 2161 - 2180 of 35888 results
  • Synthesis of Best Application and Verification Practices for LongLife Pavement Markings Final Report
    Synthesis of Best Application and Verification Practices for Long-Life Pavement Markings: Final Report
    Qiao, Fengxiang ;
    Kazimi, Sayed Abuzar
    2023-01-01 | PDF
    Proper application of pavement markings plays an important role in enhancing the safety of roadway users. The purpose of this study is to carefully synthesize information on the usage of various types of pavement marking materials (including but not limited to the types of marking materials and quality control approaches, types of specifications, a ...
  • Moving Forward Ohio Department of Transportation Research Program Newsletter 2023 Volume 1
    Moving Forward: Ohio Department of Transportation Research Program Newsletter: 2023 Volume 1
    Ohio’s Research Initiative for Locals
    2023-01-01 | PDF
    ORIL is a program designed to provide practice-ready solutions to real-world issues facing Ohio’s local transportation system through research. It’s a multi-organizational collaborative effort to improve the transportation network in Ohio’s counties, townships, cities and villages.
  • Langdon Walkability Assessment 2022
    Langdon Walkability Assessment 2022
    Sharma, Kshitij
    2023-01-01 | PDF
    A community is considered walkable if it is easy as well as safe for pedestrians to walk for recreation, exercise, and to school, stores, parks, the post office, etc. Additionally, a walkable community encourages safe use of existing infrastructure while expanding transportation options for users with varied ranges of mobility. This report document ...
  • Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring Wireless Sensing Summary
    Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring: Wireless Sensing [Summary]
    Lu, Na
    2023-01-01 | PDF
    Construction and concrete production procedures are time sensitive and fast paced. As such, it is crucial to monitor the strength of concrete in real-time. Existing concrete strength testing methods, such as traditional hydraulic compression method specified by ASTM C 39 and the maturity method specified by ASTM C 1074, can be inaccurate, labor int ...
  • Prediction of Interstate Travel Time Reliability Phase II
    Prediction of Interstate Travel Time Reliability: Phase II
    Zhao, Mo ;
    Appiah, Justice
    2023-01-01 | PDF
    Accurate prediction of travel time reliability measures would help state departments of transportation set performance targets and communicate the progress toward meeting those targets as required by the Moving Ahead for Progress in the 21st Century Act (MAP-21). In a recent Virginia Transportation Research Council study, Methods to Analyze and Pre ...
  • Geotechnical Asset Management for Louisiana
    Geotechnical Asset Management for Louisiana
    Gautreau, Gavin P. ;
    Lee, Adele
    2023-01-01 | PDF
    This research advanced Geotechnical Asset Management (GAM) within DOTD. It describes the logic and software utilized to develop the DOTD retaining wall inventory and outlines a GAM path forward for the Department. The developed GAM GIS database provides geospatial locations, digital storage, digital rating applications, and visual interfaces for re ...
    Supporting Files
  • Efficient Model for Predicting Friction on Texas Highway Network
    Efficient Model for Predicting Friction on Texas Highway Network
    Sabillon, Christian ;
    Hernandez, Joaquin
    2023-01-01 | PDF
    The objective of this project was to develop a model to predict friction that could be applied at the network level to overcome some of the issues associated with friction measuring equipment. This project developed an instrument that can collect high-resolution surface profiles to determine macrotexture and microtexture under different conditions ...
  • Predictive Analytics for Quantifying the LongTerm Costs of Defects During Bridge Construction
    Predictive Analytics for Quantifying the Long-Term Costs of Defects During Bridge Construction
    Criner, Nichole Marie ;
    Salmeron, Manuel
    2023-01-01 | PDF
    During the lifecycle of a bridge, deterioration of the concrete deck originates from many sources, e.g., corrosion due to water infiltration in conjunction with chlorides from the use of de-icing salts. Such deterioration may be affected by any one of the following six actions relevant to a bridge from conception to demolition: design, construction ...
  • Developing Means of Compliance for eVTOL Vehicles Phase II Final Report
    Developing Means of Compliance for eVTOL Vehicles: Phase II Final Report
    Klyde, D H ;
    Jones, M. G.
    2023-01-01 | PDF
    Development of new air vehicles types (e.g., personal air vehicles, urban taxis, etc.) have led to a proliferation of Vertical Takeoff and Landing (VTOL) vehicle concepts including electric vehicles, many of which are well funded and are in various stages of prototype development and testing. These vehicles almost exclusively feature fly-by-wire (F ...
  • Interlayer Mixture Design
    Interlayer Mixture Design
    Christensen, Donald W.
    2023-01-01 | PDF
    The purpose of this research was to develop a simple alternative to flexural fatigue testing for ensuring the fatigue performance of Interlayer Mixture Designs (IMOs) in Wisconsin. The research approach involved producing 15 different mixtures and characterizing these mixtures using the CT index as determined from the ideal CT test, and characteriz ...
  • Identifying Microtransit Service Areas Through Microsimulation
    Identifying Microtransit Service Areas Through Microsimulation
    Macfarlane, Gregory S ;
    Atchley, S. Hayden
    2023-01-01 | PDF
    Demand-responsive microtransit services have operated in Utah since a pilot program debuted in Fall 2019. The Utah Transit Authority (UTA) and its partners see such services as providing key mobility in transit-limited areas, but how to prioritize which areas receive such services is an open question. In this research, we present a multi-agent dail ...
  • Louisiana Transportation Research Center Annual Report 20222023
    Louisiana Transportation Research Center: Annual Report 2022–2023
    Louisiana Transportation Research Center
    2023-01-01 | PDF
    This publication is a report of the transportation research, technology transfer, education, and training activities of the Louisiana Transportation Research Center for 2022-2023. The center is sponsored jointly by the Louisiana Department of Transportation and Development and Louisiana State University.
  • Traffic Safety Facts 2020 Data Older Population
    Traffic Safety Facts 2020 Data: Older Population
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-01-01 | National Transportation Statistics (NTS) | PDF
    In 2020 there were 6,549 people 65 and older killed in traffic crashes in the United States, accounting for 17 percent of all traffic fatalities. From 2019 to 2020 there was a 10-percent decrease in the number of people 65 and older killed in traffic crashes.
  • Pedestrian and Bicycle Improvement Scoring Method for SHIFT2024
    Pedestrian and Bicycle Improvement Scoring Method for SHIFT–2024
    Stamatiadis, Nikiforos ;
    Korostina, Daria
    2023-01-01 | PDF
    State transportation agencies have limited funding to deliver multimodal transportation programs that address the needs of all users. To allocate project funding in an impartial and objective manner, many agencies have adopted data-driven scoring systems that are used to evaluate the merits of proposed capital improvement projects. The Kentucky Tra ...
  • Deploying Digital Trust for Places and Routines DTPR in DC Testing A Methodology for Increasing Legibility and Enabling Public Feedback for Technology in the Public Realm
    Deploying Digital Trust for Places and Routines (DTPR) in DC: Testing A Methodology for Increasing Legibility and Enabling Public Feedback for Technology in the Public Realm
    Farra, Jason ;
    Lu, Jacqueline
    2023-01-01 | PDF
    The Digital Trust for Places and Routines (DTPR) open-source standard was tested as part of a Pedestrian Safety Technology Pilot Sandbox project rolled out by DDOT and their consultant. The DTPR standard was an effective tool for gathering and organizing privacy and data collection related information about each technology that was deployed as part ...
  • Collect Data Using Connected Vehicles CV for RealTime and Future Use
    Collect Data Using Connected Vehicles (CV) for Real-Time and Future Use
    Zhou, Kun
    2023-01-01 | PDF
    Current Intelligent Transportation System (ITS) equipment used for "sensing" the operations of highways are very limited, both in geographic coverage and in the measured data they can provide. To effectively monitor, measure, and manage the Daily Vehicle-Hours of Delay (DVHD) on the transportation network, transportation agencies must again focus o ...
  • FDOT Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls Summary
    FDOT Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls [Summary]
    Fitzgerald, Rickey ;
    Ozkul, Seckin
    2023-01-01 | PDF
    The goal of this project was to identify sites and counties that have the greatest need for empty backhauling relief in Florida, and then evaluate high-performing manufacturing industries that might work for those areas. If manufacturing could increase in those places, empty backhauling could likewise be reduced.
  • GeoStatistical Deep Foundation Software Final Report
    Geo-Statistical Deep Foundation Software [Final Report]
    Davidson, Michael T. ;
    Rodgers, Michael B
    2023-01-01 | PDF
    When performing geotechnical design of bridge foundations, two sources of uncertainty that arise are spatial variability of soil (and rock) properties and bias intrinsic to empirical correlations (method error) that relate geotechnical site measurements to predictions of foundation member resistance. In current practice, spatial variability and met ...
  • Peak Mean and LowStreamflow RegionalRegression Equations for Natural Streamflow in Central and Western Colorado 2019
    Peak-, Mean-, and Low-Streamflow Regional-Regression Equations for Natural Streamflow in Central and Western Colorado, 2019
    Kohn, Michael S. ;
    Mast, M. Alisa
    2023-01-01 | PDF
    The U.S. Geological Survey (USGS), in cooperation with the Colorado Department of Transportation, developed peak-, mean- and low-streamflow regional-regression equations for estimating various streamflow statistics for natural streamflow in central and western Colorado. At the completion of the streamgage selection process, a total of 418 streamgag ...
  • Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls Summary
    Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls [Summary]
    Ozkul, Seckin ;
    Fitzgerald, Rickey
    2023-01-01 | PDF
    Florida struggles with a serious imbalance between inbound and outbound freight. Statistics from the Federal Highway Administration reveal that the total freight tonnage entering Florida is nearly double the tonnage leaving the state. This imbalance suggests that many trucks and other modes of freight transportation leave the state empty or only pa ...
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