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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 4501 - 4520 of 36908 results
  • 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 ...
  • To Automate Detecting Quantifying and Mapping of Delamination via Arial Thermography
    To Automate Detecting, Quantifying and Mapping of Delamination via Arial Thermography
    Shen, Zhigang ;
    Cheng, Chongsheng
    2020-12-01 | PDF
    The goal of this project is to develop a UAV-based Arial thermographic method to detect and map the delamination on concrete bridge decks. Several image processing methods such as level-set and machine-learning were developed in this project. The developed method is high-efficient and low-cost and requires no-traffic-closure during the surveying pr ...
  • Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Tasks 2 3 Green and Ampt Rainfall Loss Parameters
    Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database Tasks 2 & 3: Green and Ampt Rainfall Loss Parameters
    JE Fuller Hydrology & Geomorphology, Inc.
    2020-12-01 | PDF
    This section is a continuation of work by Arizona Department of Transportation (ADOT) to develop Green and Ampt loss parameters for soils using methods developed by Saxton and Rawls (2006). Unless otherwise noted, methods for determining rainfall loss parameters are consistent with those developed by Mohave County and are included in the Drainage D ...
  • Traffic Safety Improvements at Low Water Crossings Project Summary
    Traffic Safety Improvements at Low Water Crossings [Project Summary]
    Dobrovolny, Chiara Silvestri ;
    Balke, Kevin N.
    2020-11-30 | PDF
    The researchers explored how the Texas Department of Transportation (TxDOT) might use easy, low-cost countermeasures to improve safety at LWCs. Countermeasures were focused on enhanced delineation techniques, improved flood detection sensors, active and passive warning device deployment, and connected vehicle technology integration to increase driv ...
  • Guidelines for Left Turn Signal Phasing Options by TimeofDay A Safety and Operational Study
    Guidelines for Left Turn Signal Phasing Options by Time-of-Day: A Safety and Operational Study
    Cunningham, Chris ;
    Rouphail, Nagui
    2020-11-30 | PDF
    In recent years, North Carolina has been increasingly adopting a flashing yellow arrow (FYA) traffic control for protected-permitted (PPLT) and permitted left turns. The use of three and four section heads with FYA’s is believed to minimize driver confusion between the conventional green ball and green arrow, increasing safety by reducing the poten ...
  • Quantifying the Impact of Rockfall on the Mobility of Critical Transportation Corridors
    Quantifying the Impact of Rockfall on the Mobility of Critical Transportation Corridors
    Cunningham, Keith W. ;
    Leshchinsky, Ben A.
    2020-11-30 | PDF
    This work developed a framework to assist transportation planners and managers (and others) in making informed resource allocation decisions based on the risks that rockfalls pose to the mobility of critical highway corridors. Transportation agencies, already faced with difficult asset management decisions, will benefit from a data-driven framework ...
  • Investigating the Vulnerability of Motorcyclists to Crashes and Injury
    Investigating the Vulnerability of Motorcyclists to Crashes and Injury
    Khattak, Asad ;
    Wali, Behram
    2020-11-30 | PDF
    Motorcyclists represent a segment of vulnerable road users that have high levels of risk, mostly because they lack protection. There are about 5,000 motorcyclist fatalities every year in the US. In response, the U.S. Congress has passed legislation initiating comprehensive research that identifies the causes of motorcycle crashes. This in turn resu ...
  • Studies to Develop Guidelines on Work Zone Barrier Use on Freeways Project Summary
    Studies to Develop Guidelines on Work Zone Barrier Use on Freeways: Project Summary
    Ullman, Gerald L. ;
    Rista, Emira
    2020-11-30 | PDF
    Based on the results of the tasks performed, the researchers developed recommended guidelines for use by work zone designers to help determine: • When temporary barriers should be used in work zones. • How to assess the trade-offs in alternative temporary barrier deployment options upon expected work zone crashes, especially when the alternatives r ...
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