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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 4061 - 4080 of 36011 results
  • Calibration of Highway Safety Manual Prediction Models for Freeway Segments SpeedChange Lanes Ramp Segments and Crossroad Ramp Terminals in Kansas
    Calibration of Highway Safety Manual Prediction Models for Freeway Segments, Speed-Change Lanes, Ramp Segments, and Crossroad Ramp Terminals in Kansas
    Dissanayake, Sunanda ;
    Matarage, Imalka Chiranthi
    2020-12-01 | PDF
    Crash prediction models in the Highway Safety Manual (HSM) are used to quantify the safety experience of new and existing roadways. Safety Performance Functions (SPFs) or crash prediction models are statistical formulas developed on limited data from a few selected states, Kansas not being one of those states. Therefore, the HSM recommends calibrat ...
  • Development of a Management Guide for Concrete Bridge Decks in Utah
    Development of a Management Guide for Concrete Bridge Decks in Utah
    Emery, Tenli Waters ;
    Polanco, Hannah
    2020-12-01 | PDF
    The objectives of this research were to 1) investigate bridge deck condition assessment methods used in the field and laboratory, methods of managing bridge decks, and methods for estimating remaining bridge deck service life using computer models through a comprehensive literature review on these subjects; 2) collect and analyze field data from re ...
  • Impact on Compaction of Virginias DenseGraded Asphalt Surface Mixtures From Recent Changes To Design and Construction Acceptance Criteria
    Impact on Compaction of Virginia’s Dense-Graded Asphalt Surface Mixtures From Recent Changes To Design and Construction Acceptance Criteria
    McGhee, Kevin K. ;
    Smith, Bryan L.
    2020-12-01 | PDF
    In 2016, the Virginia Department of Transportation implemented new design criteria for most dense-graded surface mixtures with the objective of improving material durability. The 2016 construction season was also significant for a series of pilot projects that were designed to explore how potential incentives for in-place density might affect const ...
  • Integrating Advanced Technologies into Winter Operations Decisions
    Integrating Advanced Technologies into Winter Operations Decisions
    Minge, Erik ;
    Gallagher, Mark R.
    2020-12-01 | PDF
    This report summarizes the state of the practice in the application of advanced technologies to winter road maintenance operations. Information was captured through a combination of literature search, surveys, and interviews with key stakeholders. Several promising technologies were identified as areas of interest. These areas include connected aut ...
  • Investing in Bicycle Infrastructure To Spur Statewide Economic Growth Through Bicycle Tourism
    Investing in Bicycle Infrastructure To Spur Statewide Economic Growth Through Bicycle Tourism
    Aguero Arroyo, Pedro ;
    Piatkowski, Daniel P
    2020-12-01 | PDF
    Bicycle tourism is a growing industry that has been shown by prior studies to contribute significantly to the economy of numerous states. The economic benefits of recreational bicycling are not limited to the direct effects of the transactions of bicyclists in related industries, but also spillover effects such as the reduction of automobile activi ...
  • A Synthesis of Passive ThirdParty Data Sets Used for Transportation Planning
    A Synthesis of Passive Third-Party Data Sets Used for Transportation Planning
    Macfarlane, Gregory S ;
    Copley, Michael J
    2020-12-01 | PDF
    This report summarizes an extensive review of academic and professional research making use of third-party data products available to transportation agencies. In particular, the review focused on studies conducted with Bluetooth receivers, Global Positioning System (GPS) devices, and mobile device data (MDD) obtained through cellular networks and l ...
  • Interchange Design To Accommodate Ramp Metering System
    Interchange Design To Accommodate Ramp Metering System
    Washburn, Scott S. ;
    Shastri, Akhilesh
    2020-12-01 | PDF
    The majority of the existing research regarding ramp metering has largely been focused on ramp signal timing algorithms and/or the design of the on-ramp itself for accommodating ramp metering operations, irrespective of the particular overall interchange design. However, what is generally lacking is research that considers how ramp metering should ...
  • Investigation of Durability and Performance of High Friction Surface Treatment
    Investigation of Durability and Performance of High Friction Surface Treatment
    Wei, Fulu ;
    Wang, Ce
    2020-12-01 | PDF
    The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to det ...
  • Bridge Deck Repair Investigation and Quantity Estimation
    Bridge Deck Repair Investigation and Quantity Estimation
    Kim, Yail Jimmy
    2020-12-01 | PDF
    This report presents a case study on the evaluation of bridge decks using various non-destructive test methods. In consultation with the Colorado Department of Transportation, five representative bridges are selected and assessed by qualitative/empirical (visual inspection and chain drag) and quantitative (ground-penetrating radar (GPR) and rebound ...
  • Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Task 4 SelfHelp Training Documentation
    Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Task 4: Self-Help Training Documentation
    JE Fuller Hydrology & Geomorphology, Inc.
    2020-12-01 | PDF
    This document is intended to function as a Nevada Department of Transportation (NDOT) internal Self help guide for developing a simple hydrologic model using HEC-HMS. The model was developed based on the functions available in HEC-HMS Version 4.6. The example does not explain all the functions within HEC-HMS but makes use of the common functions av ...
  • Economic Impact Analysis of Georgias Rural and Small Urban Transit Systems Volume 1
    Economic Impact Analysis of Georgia’s Rural and Small Urban Transit Systems, Volume 1
    Dhongde, Shatakshee ;
    Garrow, Laurie A.
    2020-12-01 | PDF
    On March 30, 2017, the Georgia Legislature passed House Resolution 848 to create a Commission on Transit Governance and Funding. The Commission’s mission is to “study and assess the needs for and means of providing a system of mass transportation…in the state and [identify] potential methods of funding such systems” (HR 848). Currently, the State o ...
  • Developing a New Cash Flow Expenditures Model Considering the Flexibilities Offered by the DesignBuildFinance DBF and PublicPrivate Partnership P3 Project Delivery Methods
    Developing a New Cash Flow Expenditures Model Considering the Flexibilities Offered by the Design–Build–Finance (DBF) and Public–Private Partnership (P3) Project Delivery Methods
    Ashuri, Baabak ;
    Liang, Yunping
    2020-12-01 | PDF
    State departments of transportation (state DOTs) have implemented transportation financial plans to utilize federal and state transportation funding within at least a four-year horizon and possibly longer. It is critical for state DOTs to maintain adequate cash balance that helps establish a clear transportation plan and program. Over the past deca ...
  • Continuing Intensive Monitoring of Nutrient and Material Load in Claridge Nursery Stream The Canal Assessing the Water Quality Impacts Benefits of a Stream Restoration in the Coastal Plain
    Continuing Intensive Monitoring of Nutrient and Material Load in Claridge Nursery Stream “The Canal”: Assessing the Water Quality Impacts & Benefits of a Stream Restoration in the Coastal Plain
    Birgand, François ;
    Belensky, Cyrus
    2020-12-01 | PDF
    This report constitutes the second phase to document the water quality benefits of a stream restoration in the coastal plain of North Carolina. This phase compares the pre-restoration and post-restoration states of the water quality and hydrochemical signature of ‘the canal’ at the Claridge nursery in Goldsboro, NC. We made the hypothesis that a ro ...
  • Stainless Steel Strands and Lightweight Concrete for Pretensioned Concrete Girders Final Report A Stainless Steel Strands
    Stainless Steel Strands and Lightweight Concrete for Pretensioned Concrete Girders (Final Report A – Stainless Steel Strands)
    Rambo-Roddenberry, Michelle ;
    Al-Kaimakchi, Anwer
    2020-12-01 | PDF
    Durability of prestressed concrete bridges in extremely aggressive environments is of increasing concern because of corrosion of the carbon steel strands. One solution to overcome the early deterioration of coastal bridges is to use corrosion-resistant strands, such as duplex high-strength stainless steel (HSSS) strands. The use of HSSS strands in ...
  • A Big Data Approach for Improving Nebraska Cycling Routes
    A Big Data Approach for Improving Nebraska Cycling Routes
    Alsaleem, Fadi ;
    Al-Ramini, Ali
    2020-12-01 | PDF
    More people are becoming interested in creating healthy lifestyle habits for themselves. It has been proved that cycling has several health benefits. Therefore, governments are planning towards more cycling-friendly infrastructures and environments. To understand the cycling activities in Nebraska, we analyze Strava data for the last three years, p ...
  • Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Task 5 Hydrologic Model Testing
    Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Task 5: Hydrologic Model Testing
    JE Fuller Hydrology & Geomorphology, Inc.
    2020-12-01 | PDF
    This document is intended to function as an example of the use of soils data and methods required to implement the Green and Ampt methodology within the state of Nevada. An example hydrologic watershed model was supplied by Nevada Department of Transportation (NDOT). The hydrologic model used the Natural Resources Conservation Service (NRCS) curve ...
  • Hot Shots for Cold Climates Evaluating Treatment of the Hardest Icy Spots
    Hot Shots for Cold Climates – Evaluating Treatment of the Hardest Icy Spots
    Druschel, Stephen J.
    2020-12-01 | PDF
    Nineteen state highway locations around south-central and southwestern Minnesota were evaluated during winter 2019-20 for the application of deicer “hot shots,” extra levels of salt or other chemical treatments used to deice roadways and maintain roadway driving levels of performance. Locations were selected based on previous recordkeeping that ind ...
    Supporting Files
  • Research Library Operations 20192020
    Research Library Operations (2019–2020)
    Taylor, Teri
    2020-12-01 | PDF
    The NJDOT Research Library operates as a branch of the New Jersey State Library and is funded by the FHWA State Planning and Research Program as a research project. The library serves NJDOT employees; New Jersey state government employees; other libraries, organizations, and businesses; and members of the general public. Professional Librarians pro ...
  • Public Acceptance of INDOTs Traffic Engineering Treatments and Services
    Public Acceptance of INDOT’s Traffic Engineering Treatments and Services
    Adsit, Sarah E ;
    Konstantinou, Theodora
    2020-12-01 | PDF
    As a public agency, interacting with and understanding the public’s perspective regarding agency activities is an important endeavor for the Indiana Department of Transportation (INDOT). Although INDOT conducts a biennial customer satisfaction survey, it is occasionally necessary to capture public perception regarding more specific aspects of INDOT ...
  • Using an Ultraaccelerated Test Method to Evaluate Aggregate and Cement Combinations to Use Recycled Concrete Aggregate in New Concrete Construction
    Using an Ultra-accelerated Test Method to Evaluate Aggregate and Cement Combinations to Use Recycled Concrete Aggregate in New Concrete Construction
    Tanner, Jennifer E. ;
    Hossain, Md Tarik
    2020-12-01 | PDF
    The Rocky Mountain Region has experienced considerable difficulty due to the presence of alkali-silica reaction (ASR) in concrete construction. Several sources of aggregate that have produced poorly performing concrete have been removed from service. As an example, DIA runways were damaged by ASR and the repair cost exceeded 30 million. On a positi ...
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