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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 3681 - 3700 of 36908 results
  • Practitioner Guide An Inventory of Vehicle Design Strategies Aimed at Reducing COVID19 Transmission in Public and Private Pooled and Shared Transportation
    Practitioner Guide: An Inventory of Vehicle Design Strategies Aimed at Reducing COVID-19 Transmission in Public and Private Pooled and Shared Transportation
    Sanguinetti, Angela ;
    DePew, Ashley
    2021-09-01 | PDF
    The COVID-19 pandemic has had dramatic impacts on transportation globally, reducing travel and deterring travelers from using shared and pooled modes such as public transit, carpooling, car-sharing, pooled ride-hailing, and micromobility. These modes are critical components of a decarbonized and equitable mobility future, but already comprised a sm ...
  • Effective Design and Operation of Pedestrian Crossings
    Effective Design and Operation of Pedestrian Crossings
    Ahmad, Noshin S ;
    Pineda-Mendez, Raul
    2021-09-01 | PDF
    Pedestrians are vulnerable road users since they are prone to more severe injuries in any vehicular collision. While innovative solutions promise improved pedestrian safety, a careful analysis of local conditions is required before selecting proper corrective measures. This research study had two focuses: (1) methodology to identify roads and areas ...
  • Exploring ShortSea Shipping as an Alternative to NonBulk Freight Trucking in Southeastern MA
    Exploring Short-Sea Shipping as an Alternative to Non-Bulk Freight Trucking in Southeastern MA
    Uiterwyk, Kristin ;
    Johnson, C.
    2021-09-01 | PDF
    The Island of Martha’s Vineyard relies on the transport of goods and people via Steamship Authority Vessels operating from Woods Hole in Falmouth, MA. The purpose of this research project was to study the feasibility of expanding the waterborne distribution of non-bulk freight between mainland Massachusetts and the island of Martha’s Vineyard. The ...
  • Public Perception of the Collection and Use of Connected Vehicle Data
    Public Perception of the Collection and Use of Connected Vehicle Data
    Acharya, Sailesh ;
    Mekker, Michelle
    2021-09-01 | PDF
    Connected vehicles (CV) offer various potential improvements to the existing transportation system. However, to maximize these benefits, sufficient market penetration is needed. The existing literature lacks understanding of public perception of CV adoption. Past studies highlighted data privacy and security as possible barriers to CV acceptance. T ...
  • NJDOT Research Library Action Plan Final Report
    NJDOT Research Library Action Plan: Final Report
    Faron, Whitney ;
    Marks, Michael
    2021-09-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to assess the NJDOT Research Library’s mission and goals, document the current state of the Research Library in relation to the mission and goals, understand how other states manage and operate their research libraries; and develop an action plan for improving th ...
  • NYSDOT Research Peer Exchange The Use of Data Management and Analytics to Improve Agency Decision Making and the SPR Research Program
    NYSDOT Research Peer Exchange: The Use of Data Management and Analytics to Improve Agency Decision Making and the SPR Research Program
    Hill, Jonathan ;
    Lund, Ryan
    2021-09-01 | PDF
    The following report summarizes the results of the New York State Department of Transportation (NYSDOT) State Planning and Research (SPR) research peer exchange held on February 2-4, 2021. Managers and staff from NYSDOT’s Office of Technical Services of the Engineering Division and the Office of Policy, Planning and Performance of the Policy and Pl ...
  • Laboratory Guidelines for ColdinPlace Recycling Mixture Design
    Laboratory Guidelines for Cold-in-Place Recycling Mixture Design
    Im, Soohyok ;
    Sebesta, Stephen
    2021-09-01 | PDF
    This guideline describes procedures for selecting and obtaining representative samples and the laboratory mix design procedures for cold in-place recycling (CIR) using the indirect tensile strength (IDT) test.
  • Use of Ground Penetrating Radar Technology To Assess and Monitor Pavement Structural Conditions for Improved Pavement Maintenance and Rehabilitation Strategies
    Use of Ground Penetrating Radar Technology To Assess and Monitor Pavement Structural Conditions for Improved Pavement Maintenance and Rehabilitation Strategies
    Kim, S Sonny ;
    Durham, Stephan A.
    2021-09-01 | PDF
    Ground-penetrating radar (GPR) technology has been widely applied in ground subsurface investigations. The major development of GPR for pavement assessment originated in the early 1980s and since has become a well- established investigation technique for pavements. Analysis of GPR data provides much richer information on layer depths of pavement st ...
  • Cargo Routing and Disadvantaged Communities
    Cargo Routing and Disadvantaged Communities
    Jaller, Miguel ;
    Pahwa, Anmol
    2021-09-01 | PDF
    Freight is fundamental to economic growth, however, the trucks that haul this freight are pollution intensive, emitting criteria pollutants and greenhouse gases at high rates. The increasing volume and time-sensitivity of freight demand over the past decade has encouraged carriers to take the fastest route, which is often not an eco-friendly route. ...
  • Evaluation of Illinois Bridge Deterioration Models
    Evaluation of Illinois Bridge Deterioration Models
    Fu, Gongkang
    ORCID ICON IMG
    2021-09-01 | PDF
    The National Bridge Inventory bridge inspection system ranks the condition of bridge components on a scale of zero to nine. The resulting condition ratings represent an important element considered in deciding measures for bridge maintenance, repair, and rehabilitation. Thus, forecasting future condition ratings well is critical to reliable plannin ...
  • Qualification and Testing of NDT and MechanicsBased Approaches for Evaluating Flexible Base Construction
    Qualification and Testing of NDT and Mechanics-Based Approaches for Evaluating Flexible Base Construction
    Lytton, Robert ;
    Devadas, Arvind
    2021-09-01 | PDF
    The study identifies GPR systems that can perform rapid, non-invasive inspection of pavement layer(s) focusing on base course.
  • Optimization of LongTerm Highway Work Zone Scheduling
    Optimization of Long-Term Highway Work Zone Scheduling
    Fan, Wei (David) ;
    Li, Yi
    2021-09-01 | PDF
    No Description
  • Developing a Methodology for Implementing Safety Improvements on LowVolume Roads in Montana
    Developing a Methodology for Implementing Safety Improvements on Low-Volume Roads in Montana
    Al-Kaisy, Ahmed ;
    Huda, Kazi Tahsin
    2021-09-01 | PDF
    Rural low-volume roads (LVRs) are an integral part of the highway system as they provide connectivity to rural areas. Low traffic volumes and the random and sporadic nature of crash occurrence over LVR networks pose challenges in using the conventional crash-based network screening methods. Therefore, the objective of this research project is to de ...
  • Advanced Geophysical Tools for Geotechnical Analysis Final Report
    Advanced Geophysical Tools for Geotechnical Analysis: Final Report
    Shahandashti, Mohsen ;
    Hossain, Sahadat
    2021-09-01 | PDF
    Texas Department of Transportation (TxDOT) encounters a considerable and yet increasing number of claims and change orders every year that negatively affects project costs and schedules. Insufficient and inaccurate information about the subsurface condition is a critical factor contributing to these cost overruns and delays. The annual cost of chan ...
  • Local Mobility Improvements for Communities in the Region LINC Linking Our Networked Communities
    Local Mobility Improvements for Communities in the Region (LINC: Linking Our Networked Communities)
    Gastil, Raymond W ;
    Quick, Stephen L
    2021-09-01 | PDF
    Carnegie Mellon’s Remaking Cities Institute (RCI), supported by a challenge grant from CMU’s Traffic21 and the Mobility21 Urban Transportation Center, worked with communities in Allegheny County to address local mobility challenges and opportunities, specifically the role of new mobility options in addressing the challenges for residents with no or ...
  • HighVolume Fly Ash Concrete for Pavements Findings Volume 1
    High-Volume Fly Ash Concrete for Pavements Findings: Volume 1
    Baral, Aniruddha ;
    Roesler, Jeffrey R.
    2021-09-01 | PDF
    High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for paveme ...
  • Evaluation of Alternatives to Calcined Bauxite for Use in High Friction Surface Treatment HFST in Missouri
    Evaluation of Alternatives to Calcined Bauxite for Use in High Friction Surface Treatment (HFST) in Missouri
    Deef-Allah, Eslam ;
    Broaddus, Korrenn
    2021-09-01 | PDF
    High Friction Surface Treatments (HFST) applications are used to reduce roadway crashes on risky locations and horizontal curves. Currently, Calcined Bauxite (CB) is the primary aggregate used for HFST in Missouri. Calcined Bauxite has very limited sources, which makes it more expensive than locally available aggregates. This research evaluated CB' ...
  • Making Transit Safe to Ride During a Pandemic What Are the Risks and What Can Be Done in Response
    Making Transit Safe to Ride During a Pandemic: What Are the Risks and What Can Be Done in Response?
    Ding, Hao ;
    Taylor, Brian D.
    2021-09-01 | PDF
    The Covid-19 pandemic dramatically curtailed travel in the spring of 2020 and more moderately in the months that followed. Travel on public transport declined more and remains lower than on other travel modes, such as driving, biking, and walking. Although public transit operators have implemented various measures to reduce the risk of infection fo ...
  • Estimating AADT on NonCoverage Roads
    Estimating AADT on Non-Coverage Roads
    Huynh, Nathan ;
    Wang, Jing
    2021-09-01 | PDF
    This project developed several models to obtain accurate estimates of annual average daily traffic (AADT) at non-coverage locations. The developed models include kriging, regression and point-based. The standard kriging approach is modified in this project to use a default value when its predicted value is over a user-specified threshold (referred ...
  • Develop Rapid Quality Control and Assurance Technologies for Pavements Phase II Report
    Develop Rapid Quality Control and Assurance Technologies for Pavements: Phase II Report
    Crockford, Bill ;
    Deng, Yong
    2021-09-01 | PDF
    This project expanded on the technology readiness of three non-destructive tools for potentially enhancing quality inspection, asset management, or forensic investigations in flexible pavements. These tools included mechanics-based models for base course, compaction monitoring system (CMS) for asphalt mixture process control, and ground penetrating ...
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