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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 3141 - 3160 of 36873 results
  • Surveying the Financial Conditions of Californias Public Transit Operators An Early to MidPandemic Comparison
    Surveying the Financial Conditions of California’s Public Transit Operators: An Early to Mid-Pandemic Comparison
    Siddiq, Fariba ;
    Wasserman, Jacob L.
    2022-05-01 | PDF
    Initially, the COVID-19 pandemic threatened to inflict severe and lasting damage to public transit in California. However, thanks to federal financial relief from three stimulus bills and stronger-than-expected bounce-back of tax revenues from state and local sources, transit agencies in 2022 have avoided that abyss—but still face an uncertain fina ...
  • Consultant Support for Intelligent Compaction and PaverMounted Thermal Profiling Projects in 20202021
    Consultant Support for Intelligent Compaction and Paver-Mounted Thermal Profiling Projects in 2020–2021
    Chang, George ;
    Gilliland, Amanda
    2022-05-01 | PDF
    Due to the success of the MoDOT 2017-2019 Intelligent Compaction and Paver-Mounted Thermal Profiling (IC-PMTP) projects that demonstrate the paving quality improvements on numerous field projects, MoDOT has established a plan that includes additional IC-PMTP projects in 2020 and using IC-PMTP data for acceptance in 2021. To ensure the continued suc ...
  • Traffic Analysis Tools Assessment Comparison and Validation Study
    Traffic Analysis Tools: Assessment, Comparison and Validation Study
    Rouphail, Nagui M. ;
    Samandar, Shoaib
    2022-05-01 | PDF
    This report summarizes the findings of a research project aimed at assessing the accuracy of both analytical and microsimulation tools in describing the operational performance of a variety of intersection and interchange types under North Carolina conditions. The three tools evaluated in this study were SYNCHRO10, SIDRA9 and Trans Modeler5. In add ...
  • Micromobility Trip Characteristics Transit Connections and COVID19 Effects
    Micromobility Trip Characteristics, Transit Connections, and COVID-19 Effects
    Fukushige, Tatsuya ;
    Fitch, Dillon T.
    2022-05-01 | PDF
    While micromobility services (e.g., bikeshare, e-bike share, e-scooter share) hold great potential for providing clean travel, estimating the effects of those services on vehicle miles traveled and reducing greenhouse gases is challenging. To address some of the challenges, this study examined survey, micromobility, and transit data collected from ...
  • Evaluation of Traffic Speed Deflectometer for Collecting Network Level Pavement Structural Data in Tennessee
    Evaluation of Traffic Speed Deflectometer for Collecting Network Level Pavement Structural Data in Tennessee
    Huang, Baoshan ;
    Zhang, Miaomiao
    2022-05-01 | PDF
    The Traffic Speed Deflectometer (TSD) overcomes the Falling Weight Deflectometer (FWD) limitations in terms of traffic interruption and testing inefficiency, which has been used for network-level pavement structural evaluation. However, some challenges exist as applying the TSD for routine survey works. A comparison of pavement response under the T ...
  • Raised Pavement Markers RPMs Assessment Using Highway Speed Mobile Retroreflectivity Technology Summary
    Raised Pavement Markers (RPMs) Assessment Using Highway Speed Mobile Retroreflectivity Technology [Summary]
    Fletcher, James H.
    2022-05-01 | PDF
    Raised pavement markers (RPMs) are common on Florida roadways. They improve the visibility of driving lanes under wet or nighttime conditions, especially on rural roads where illumination may be lacking. The effectiveness of RPMs is due to their retroreflectivity, which is the ability to reflect light back toward its source (for example, a driver’s ...
  • RealTime Signal Performance Measurement Phase Data and Functionality Enhancement Large Scale Deployment Connected and Autonomous Vehicles Integration Technical Brief
    Real-Time Signal Performance Measurement Phase Ⅱ: Data and Functionality Enhancement, Large Scale Deployment, Connected and Autonomous Vehicles Integration [Technical Brief]
    Jin, Peter J. ;
    Brennan, Thomas M. Jr.
    2022-05-01 | PDF
    The primary objective of the second phase of this project is to develop and deploy a significantly enhanced version of the original toolbox, NJDOT ATSPM 2.0, along with a pilot study on the integration of adaptive signal controllers with CAV technologies. NJDOT arterial management operators can then use the ATSPM platform to generate key performanc ...
  • Effect of Realtime Traffic Data on Truck Diversion Routing on I75 Summary
    Effect of Real-time Traffic Data on Truck Diversion Routing on I-75 [Summary]
    Oloufa, Amr
    2022-05-01 | PDF
    University of Central Florida researchers developed a system for collecting real-time information about cars and trucks on Interstate highways. A second system uses this data to recommend appropriate diversion routes.
  • Alternative Funding Approaches for Iowa Roads Tech Brief
    Alternative Funding Approaches for Iowa Roads [Tech Brief]
    Iowa Highway Research Board
    2022-05-01 | PDF
    TR-790: Alternative Funding Approaches for Iowa Roads provides the Iowa Highway Research Board (IHRB) with near-term and long-range funding recommendations to address ongoing road and bridge needs across the State of Iowa (the State) based on transportation industry research, academic research, technical analyses, and feedback from the project’s Te ...
  • Evaluating the Usage of Culverts and Bridges by Wildlife in Arkansas
    Evaluating the Usage of Culverts and Bridges by Wildlife in Arkansas
    Srebalus, Madison
    2022-05-01 | PDF
    Vehicle collisions with animals threaten the lives and safety of wildlife and motorists. In an attempt to reduce vehicle collisions with animals, additional infrastructure was installed under bridges and within culverts to allow wildlife to pass beneath sections of highway. Photo evidence suggests that wildlife will usually use these structures, an ...
  • Development of InSitu Sensing Method for the Monitoring of WaterCement WC Values and the Effectiveness of Curing Concrete
    Development of In-Situ Sensing Method for the Monitoring of Water-Cement (W/C) Values and the Effectiveness of Curing Concrete
    He, Rui ;
    Lu, Na (Luna)
    2022-05-01 | PDF
    As the most widely used construction material, concrete is very durable and can provide long service life without extensive maintenance. The strength and durability of concrete are primarily influenced by the initial water-cement ratio value (w/c), and the curing condition during the hardening process also influences its performance. The w/c value ...
  • Guidelines for Activating Ramp Meters During OffPeak Hours and Weekends
    Guidelines for Activating Ramp Meters During Off-Peak Hours and Weekends
    Alluri, Priyanka ;
    Sando, Thobias
    2022-05-01 | PDF
    Ramp metering is a Transportation Systems Management and Operations (TSM&O) strategy that utilizes signals installed at freeway on-ramps to dynamically manage traffic entering the freeway. Ramp metering signals (RMSs) are usually activated during peak hours to alleviate recurring congestion. However, recurrent congestion during peak hours constitut ...
  • Division of Operations Research OnCall ROC Task3 Measuring ODOTs Towing Recovery Incentive Payments TRIP Program
    Division of Operations Research On-Call (ROC) Task#3 - Measuring ODOT’s Towing Recovery Incentive Payments (TRIP) Program
    Lee, Kevin ;
    Laffey, Sean
    2022-05-01 | PDF
    ODOT funded this study to quantify the benefits of the Towing Recovery Incentive Payments (TRIP) program (user delay, safety, and environmental impact) and to obtain a comparison of ODOT’s TRIP Program performance relative to other states, especially in regards to commercial vehicle clearance times.
  • NHS Innovative Pavement Design Study
    NHS Innovative Pavement Design Study
    Pavey, Andrew
    2022-05-01 | PDF
    This research investigated the history and performance of hot mix asphalts (HMA) used by Alaska DOT&PF. The history and changes of HMA used between the 1970’s and 2022 was documented, and currently used mixes were evaluated using pavement management data to determine the rut and transverse (thermal) cracking rates by mix and binder types. Prall tes ...
  • The Health and Transportation Nexus A Conceptual Framework for Collaborative and Equitable Planning
    The Health and Transportation Nexus: A Conceptual Framework for Collaborative and Equitable Planning
    Fan, Yingling ;
    Phua, Peiyu
    2022-05-01 | PDF
    Transportation is a crucial contributor to health. It not only directly shapes the social and physical environments but also determines the type of places where people can live, learn, work, and play in their everyday lives. This project develops a conceptual framework for collaborative and equitable health and transportation planning by extending ...
  • Use of Lightweight Concrete for Bridge Decks in Kansas
    Use of Lightweight Concrete for Bridge Decks in Kansas
    Meggers, David A.
    2022-05-01 | PDF
    The purpose of this report is to present a summary of the work that has been done with lightweight aggregate concrete in Kansas.
  • Promoting the Adoption of Snow Fences through Landowner Engagement
    Promoting the Adoption of Snow Fences through Landowner Engagement
    Current, Dean ;
    Read, Aidan
    2022-05-01 | PDF
    Snow and ice problems on Minnesota roadways represent a cost of close to $100 million annually to MnDOT in addition to the associated public safety and environmental costs. MnDOT and the University of Minnesota have collaborated to estimate the costs and benefits of snow control measures as well as the constraints that landowners face to adopt snow ...
  • Florida ATMA Pilot Demonstration and Evaluation Summary
    Florida ATMA Pilot Demonstration and Evaluation [Summary]
    Agarwal, Nithin
    ORCID ICON IMG
    2022-05-01 | PDF
    University of Florida researchers tested the automated truck-mounted attenuator (ATMA) in controlled, off-road settings and on active roadways in simulated work zones.
  • Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa
    Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa
    Lee, Hosin “David” ;
    Moon, Byungkyu
    2022-05-01 | PDF
    The need to incorporate sustainability principles and practices is increasing due to both environmental and economic reasons. It is critical to identify and operationalize sustainability strategies into core administrative, planning, design, construction, operational, and maintenance activities for the transportation infrastructure systems using a ...
    Supporting Files
  • 2022 Remainder Sales Study Tennessee Department of Transportation RightofWay Appraisal Damages Study
    2022 Remainder Sales Study: Tennessee Department of Transportation Right-of-Way Appraisal Damages Study
    Khattak, Asad J. ;
    Mahdinia, Iman
    2022-05-01 | PDF
    The Tennessee Department of Transportation (TDOT) acquires private and commercial properties in conjunction with transportation projects. Many acquisitions are partial takings, i.e., only a portion of the total property is acquired. For such takings, damage amounts are included for the remainders in reports. However, the value of damages, determine ...
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