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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 1401 - 1420 of 35865 results
  • Quantitative Performance Measures for the Caltrans System Investment Strategy
    Quantitative Performance Measures for the Caltrans System Investment Strategy
    Chandra, Shailesh ;
    Valencia, Robert
    2023-12-13 | PDF
    This research developed a robust set of quantitative performance metrics, measures, and methodologies to assess project alignment with the Climate Action Plan for Transportation Infrastructure (CAPTI). The literature review included documenting measures and metrics in published reports, peer-reviewed journals, textbooks, and presentations. Subseque ...
  • LowCement Concrete Mixture for Bridge Decks and Rails
    Low-Cement Concrete Mixture for Bridge Decks and Rails
    Das, Soumitra ;
    Morcous, George
    2023-12-08 | PDF
    Right after construction, drying shrinkage of restrained concrete bridge decks and rails causes early-age cracking, insertion of water and chemicals, and corrosion of reinforcing steel that eventually leads to delamination and spalling of concrete. The main objective of this research is to control early-age shrinkage cracking by reducing cementitio ...
  • Geographic Data for the Estimation of Peak Flow Statistics for Illinois [supporting dataset]
    Sharpe, Jennifer B ;
    Schafer, Lindsey A.
    2023-12-08 | ZIP
    The U.S. Geological Survey Central Midwest Water Science Center completed a report (Over and others, 2023) documenting methods, results, and applications of an updated flood-frequency study for the State of Illinois. The study developed regional regression equations that relate the peak-flow quantiles and the basin characteristics of selected strea ...
    Dataset
  • Elevation, Flow Accumulation, Flow Direction, and Stream Definition Data in Support of the Illinois StreamStats Upgrade to the Basin Delineation Database [supporting dataset]
    Sharpe, Jennifer B ;
    Schafer, Lindsey A.
    2023-12-08 | ZIP
    The U.S. Geological Survey (USGS), in cooperation with the Illinois Center for Transportation and the Illinois Department of Transportation, prepared hydro-conditioned geographic information systems (GIS) layers for use in the Illinois StreamStats application. These data were used to delineate drainage basins and compute basin characteristics for u ...
    Dataset
  • Roadside Safety Performance Measures for Specific Countermeasures to Protect Workers
    Roadside Safety Performance Measures for Specific Countermeasures to Protect Workers
    Duong, Anh ;
    Soltani, Iman
    2023-12-06 | PDF
    There is a need to develop new policies and practices for roadside features that support the California Department of Transportation’s (Caltrans’) safety and asset management goals. The goal is to assist highway designers in including maintenance planning strategies to improve worker safety and working conditions. Such policies and practices should ...
  • Construction of LowCracking HighPerformance Bridge Decks Incorporating New Technology Phase II
    Construction of Low-Cracking High-Performance Bridge Decks Incorporating New Technology Phase II
    Bahadori, Alireza ;
    Darwin, David
    2023-12-01 | PDF
    The construction, crack surveys, and evaluation of 12 bridge decks with internal curing provided by prewetted fine lightweight aggregate and supplementary cementitious materials following internally cured low-cracking high-performance concrete (IC-LC-HPC) specifications of Minnesota or Kansas are described, as well as those from two associated Cont ...
  • Construction of LowCracking HighPerformance Bridge Decks Incorporating New Technology Phase II Technical Summary
    Construction of Low-Cracking High-Performance Bridge Decks Incorporating New Technology Phase II: Technical Summary
    Bahadori, Alireza ;
    Darwin, David
    2023-12-01 | PDF
    The objective of this study is to investigate the cracking of concrete bridge decks employing internal curing. Concrete mixtures incorporating internal curing, used in conjunction with slag cement with or without small amounts of silica fume (as partial replacements of portland cement), are investigated based on construction observations and crack ...
  • Comprehensive Data Analysis for AMPT Tests on MO 740 and Hwy 54
    Comprehensive Data Analysis for AMPT Tests on MO 740 and Hwy 54
    Liu, Jenny ;
    Wang, Yizhuang David
    2023-12-01 | PDF
    In this study, the S&T research team conducted comprehensive data analysis from the Asphalt Mixture Performance Tester (AMPT) samples collected in the Highway 54 and MO 740 projects. The MO 740 project in Boone County contained test sections with five mix designs, i.e., control mix, ground tire rubber (GTR)-modified mixture, and three mixtures cont ...
  • North Dakota Grain and Oilseed Transportation Statistics 202223
    North Dakota Grain and Oilseed Transportation Statistics 2022–23
    Vachal, Kimberly ;
    Andersen, Jaclyn
    2023-12-01 | PDF
    This report represents a continuation of analysis concerned with the patterns and methods of distributing grains and oilseeds from North Dakota. This series began with the analysis of 1956-57 data and was published in Agricultural Economics Reports 15, 17, 44, 56, and 86 and Agricultural Experiment Station Bulletin 462. The compilation and analysis ...
  • Annual North Dakota Elevator Marketing Report 20222023
    Annual North Dakota Elevator Marketing Report, 2022–2023
    Vachal, Kimberly ;
    Andersen, Jaclyn
    2023-12-01 | PDF
    The objective of this report is to provide a benchmark for elevator managers in assessing performance and supply a source for recognizing trends in the characteristics of North Dakota elevators. This report and the statistics mailed to individual elevators are presented as a source of information for elevator managers and those interested in the No ...
  • INDOT Research Program Benefit Cost AnalysisReturn on Investment for Projects Completed in FY 2022
    INDOT Research Program Benefit Cost Analysis—Return on Investment for Projects Completed in FY 2022
    McCullouch, Bob
    2023-12-01 | PDF
    To demonstrate the value of research and its implementation, the Governor’s Office initially requested an annual financial analysis of the INDOT Research Program to determine the return on the research investment (ROI). The INDOT Research & Development (R&D) has continued to publish an annual Return on Investment report. The current financial analy ...
  • Safe Routes Utah Plans and Active Transportation Safety
    Safe Routes Utah Plans and Active Transportation Safety
    Burbidge, Shaunna K. ;
    Gee, Collin
    2023-12-01 | PDF
    The goal of Utah’s Safe Routes to School program is to “help children get to and from school safely” (UDOT, 2022). To that end, state law dictates that each school must maintain a safe routes map showing students the safest route to access the school from their homes. This research examined existing safe routes maps and investigated whether schools ...
  • Granite Property Prebles Meadow Jumping Mouse Surveys Boulder Colorado
    Granite Property Preble’s Meadow Jumping Mouse Surveys, Boulder, Colorado
    Schorr, Robert
    2023-12-01 | PDF
    Preble’s meadow jumping mice (PMJM) are rare rodents found along creeks and waterways from southeastern Wyoming to Colorado Springs. In Colorado, PMJM are found in densely vegetation riparian corridors and wetlands along the Front Range. The biggest threat to populations is habitat conversion and alteration. Habitat regeneration and rehabilitation ...
  • Characterization of Concrete Creep and Shrinkage of the Birmingham I59I20 Segmental Bridge
    Characterization of Concrete Creep and Shrinkage of the Birmingham I-59/I-20 Segmental Bridge
    Beauchamp, Paul S ;
    Cooper, Grant M
    2023-12-01 | PDF
    The objective of this study is to accurately predict the creep and shrinkage behavior of concrete in the I-59/I-20 segmental bridge located in downtown Birmingham, Alabama. Concrete samples were collected on four sampling dates throughout the bridge’s construction for creep and shrinkage testing. Concrete specimens were loaded at 7, 28, 91, and 182 ...
  • Implementation and Assessment of Highway Intrusion Technologies
    Implementation and Assessment of Highway Intrusion Technologies
    Hasanzadeh, Sogand ;
    Esmaeili, Behzad
    2023-12-01 | PDF
    Highway workers face dangers from distracted drivers and challenging work zones, which results in thousands of incidents annually in the U.S. Traditional safety measures, though beneficial, highlight a need for advanced intrusion alert technologies. While many state DOTs are exploring these technologies, research gaps persist regarding their effect ...
  • OSTR Research Roundup Newsletter December 2023
    OST-R Research Roundup Newsletter: December 2023
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2023-12-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Interstate and Primary PCC Pavement Overlays Review
    Interstate and Primary PCC Pavement Overlays Review
    Hanson, Todd
    2023-12-01 | PDF
    Iowa has a long history of PCC pavement overlays. Several research projects were placed over the years, which led to a variety of different designs and features. The objective of this study was to perform a review of concrete overlays performance on the interstate and primary system and determine any best practices or lessons learned.
  • NJDOT Unmanned Aircraft Systems
    NJDOT Unmanned Aircraft Systems
    McKenzie, Elaine ;
    Reinhardt, Karl
    2023-12-01 | PDF
    NJDOT engaged Cambridge Systematics (CS) to review existing unmanned aircraft systems (UAS) practices within NJDOT and State DOTs to identify how UAS programs engage consultants, certify staff and consultants to conduct UAS missions, assess and manage risk associated with UAS missions, and manage and store data to comply with State and Federal regu ...
  • NJDOT Unmanned Aircraft Systems Technical Brief
    NJDOT Unmanned Aircraft Systems [Technical Brief]
    McKenzie, Elaine
    2023-12-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to review existing unmanned aircraft systems (UAS) practices within NJDOT and State Departments of Transportation (DOTs) to identify how UAS programs engage consultants, certify staff and consultants to conduct UAS missions, assess and manage risk associated with ...
  • Unticketing An UpsideDown Approach to Speed Compliance Tech Transfer Summary
    Unticketing: An Upside-Down Approach to Speed Compliance [Tech Transfer Summary]
    Shaw, John
    2023-12-01 | PDF
    This brief guide offers advice for Iowa communities seeking to implement an “unticketing” program similar to Unticketing Cerro Gordo, a traffic safety campaign conducted in summer 2023 in Cerro Gordo County, Iowa. The campaign centered on a contest that incentivized safe driving behavior by awarding small prizes to drivers who opted into the contes ...
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