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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 2561 - 2580 of 35909 results
  • Probabilistic Wind Speed Model for Local Data in All Kansas Counties
    Probabilistic Wind Speed Model for Local Data in All Kansas Counties
    Al Shboul, Khalid W ;
    Rasheed, Hayder A.
    2022-07-01 | PDF
    This study developed a spatial interpolation technique using finite element shape functions to derive wind speed records for all unsampled Kansas counties from data recorded at 17 city locations in and near Kansas. A computational method using the Kaimal spectrum is presented for generating artificial time histories of wind speeds. This is done to ...
  • Regional Optimization of Roadside Turfgrass Seed Mixtures Phase 2 Regional Field Trials and Economic Analysis
    Regional Optimization of Roadside Turfgrass Seed Mixtures Phase 2: Regional Field Trials and Economic Analysis
    Watkins, Eric ;
    Christensen, Dominic
    2022-07-01 | PDF
    Our goal was to develop seed mixture recommendations to improve establishment and development of roadside vegetation in Minnesota. We selected 14 research sites across Minnesota and seeded 40 turfgrass mixtures. Turfgrass coverage was assessed at each site twice a year and the weed seed bank was examined. We found that greater seeded turfgrass spec ...
  • Guidelines for Portable WeightinMotion Wim System Installation and Traffic Data Analysis
    Guidelines for Portable Weight-in-Motion (Wim) System Installation and Traffic Data Analysis
    Prakoso, Adrianus ;
    Chunduri, Harshavardhan Rao
    2022-07-01 | PDF
    As the portable weight-in-motion (WIM) technology has been successfully explored and practically used to collect site-specific traffic data in Texas Department of Transportation Research Project 0-6940 Develop System to Render Mechanistic-Empirical Traffic Data for Pavement Design, this standardized guideline was developed to aid users understand m ...
  • Synthesis Study of Best Practices for Cleaning Tools and Paving Equipment Asphalt Release Agents ARAs and Asphalt Cleaners ACs
    Synthesis Study of Best Practices for Cleaning Tools and Paving Equipment: Asphalt Release Agents (ARAs) and Asphalt Cleaners (ACs)
    Hasanzadeh, Sogand ;
    Velay-Lizancos, Mirian
    2022-07-01 | PDF
    Diesel has been used widely as an asphalt cleaning agent due to its effectiveness for many years. However, its negative impact on health and the environment calls for more sustainable and safe alternatives. Asphalt Release Agents (ARAs) are products for preventing or mitigating undesirable adhesion of HMA to the asphalt equipment, and Asphalt Clean ...
  • Environmental Impacts of Potassium Acetate as a Road Salt Alternative Iowa State University Evaluation
    Environmental Impacts of Potassium Acetate as a Road Salt Alternative (Iowa State University Evaluation)
    Rehmann, Chris ;
    Ikuma, Kaoru
    2022-07-01 | PDF
    The goal of this research project was to determine the environmental impact of potassium acetate (KAc) as a deicer, including its effects on water quality and the resulting toxicity to biota. The motivation for the research was the Minnesota Department of Transportation’s (MnDOT’s) exploratory use of KAc to significantly reduce the use of chloride- ...
  • NJDOT Highway Safety Improvement Program Implementation Plan Covering 2021
    NJDOT Highway Safety Improvement Program Implementation Plan [Covering 2021]
    Hopwood, Cory ;
    Glodek, Jack
    2022-07-01 | PDF
    The New Jersey Department of Transportation Bureau of Safety, Bicycle & Pedestrian Programs (BSBPP) engaged Cambridge Systematics (CS) to assist with the development of the current Highway Safety Improvement Program Implementation Plan, which was a necessary document that BSBPP had to develop after not meeting their Federal safety performance measu ...
  • Creating Safer Communities for the Use of Active Transportation Modes in California The Development of Effective Communication Message Strategy for Vulnerable Road Users
    Creating Safer Communities for the Use of Active Transportation Modes in California: The Development of Effective Communication Message Strategy for Vulnerable Road Users
    Sarofim, Samer ;
    Tawfik, Aly
    2022-07-01 | PDF
    Despite increased efforts to improve safety in recent years (e.g., the Focus Cities Program in California), California continues to have a high rate of pedestrian and bicyclist fatalities. Currently, the state currently lacks a cohesive messaging strategy to improve behaviors related to pedestrian and cyclist traffic safety practices. To fulfill th ...
  • NJDOT Highway Safety Improvement Program Implementation Plan Brief
    NJDOT Highway Safety Improvement Program Implementation Plan [Brief]
    Hopwood, Cory ;
    Glodek, Jack
    2022-07-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to assist with the development the Highway Safety Improvement Program (HSIP) Implementation Plan that will be used to improve the safety of New Jersey roads and ensure the state meets federal performance targets in the coming years.
  • Forecasting Freight Logistic Needs and INDOT Plans
    Forecasting Freight Logistic Needs and INDOT Plans
    Iyer, Ananth V ;
    Brady, Tom
    2022-07-01 | PDF
    This project focused on forecasting freight logistics needs and developing and analyzing capacity plans for INDOT to consider. The forecast timeframe ranges from the 2020 to 2045; the commodities considered are those used in the FHWA framework. We considered five SSP (Shared Socio-Economic Pathways) scenarios that are in sync with those used by the ...
  • Quick Facts 2020
    Quick Facts 2020
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2022-07-01 | National Transportation Statistics (NTS) | PDF
    In 2010, there were 32,999 people killed, 3.9 million were injured, and 24 million vehicles were damaged in motor vehicle crashes in the United States. The economic costs of these crashes totaled $242 billion. Included in these losses are lost productivity, medical costs, legal and court costs, emergency service costs (EMS), insurance administratio ...
  • Guidelines for Portable WeightinMotion WIM System Installation and Traffic Data Analysis Instructors Guide
    Guidelines for Portable Weight-in-Motion (WIM) System Installation and Traffic Data Analysis: Instructor’s Guide
    Prakoso, Adrianus ;
    Chunduri, Harshavardhan Rao
    2022-07-01 | PDF
    As the portable weight-in-motion (WIM) technology has been successfully explored and practically used to collect site-specific traffic data in Texas Department of Transportation Research Project 0-6940 Develop System to Render Mechanistic-Empirical Traffic Data for Pavement Design, this standardized guideline was developed to aid users understand m ...
  • Assessing the Health and Environmental Benefits Associated With Changes in Transportation Activities in NearRoad Communities Using LowCost Sensors
    Assessing the Health and Environmental Benefits Associated With Changes in Transportation Activities in Near-Road Communities Using Low-Cost Sensors
    Chavez, Mayra C ;
    Williams, Evan
    2022-06-30 | PDF
    On-road measurements of four pollutants (PM2.5, PM10, NO2, and O3) were continuously recorded by three U.S. EPA-certified FEM air pollution monitoring devices installed inside a vehicle traveling repeatedly on the same route in a near-road community. Spatio-temporal on-road air quality data were aggregated and compared to data collected at two fixe ...
  • Developing Scalable Models for Safety Insights and Improvements Using E-Scooter Exposure Data [supporting datasets]
    Clewlow, Regina ;
    Foti, Fletcher
    2022-06-30 | ZIP
    The U.S. Department of Transportation (DOT) is leading a Safety Data Initiative (SDI), to enhance the analysis and visualization that informs safety policy decisions. Populus was selected to perform analysis and assess the quality of leveraging GPS trip trace data from micromobility operators such as Lime, Bird, and Superpedestrian (LINK), to serve ...
    Dataset Supporting Files
  • Seismic Bearing Selection for Economic Prestressed Concrete Bridge Pier Construction
    Seismic Bearing Selection for Economic Prestressed Concrete Bridge Pier Construction
    Mullen, Chris L. ;
    Ervin, Elizabeth K.
    2022-06-30 | PDF
    In this review of seismic bearings, a compendium of public domain resources provides off-the-shelf, state-of-the-art bearing types, manufacturers, researchers, and load-deformation response data. Performance of two select seismic bearings, one generally available and one proprietary, is then assessed using finite element modeling and simulation. Th ...
  • Impacts of CTrail Hartford Line on Real Estate and Urban Economic Development Phase 1
    Impacts of CTrail Hartford Line on Real Estate and Urban Economic Development: Phase 1
    Cohen, Jeffrey P ;
    Acharya, Awanti
    2022-06-30 | PDF
    The Hartford Line, a heavy rail commuter line connecting New Haven, Hartford, CT, and Springfield, MA, with stations built and/or planned for in eleven Connecticut municipalities, received final funding approval in 2012 and opened for service in June 2018. This new commuter service may be encouraging additional transit-oriented development (TOD) al ...
  • Evaluating the Impacts of the 2017 Legislative Mandated Speed Limit Increases
    Evaluating the Impacts of the 2017 Legislative Mandated Speed Limit Increases
    Savolainen, Peter T. ;
    Gates, Timothy J.
    2022-06-30 | PDF
    This study evaluated the impacts of speed limit increases that occurred following the enactment of Michigan Public Acts 445 and 447 of 2016. Between May and June of 2017, the maximum speed limits were increased from 70 to 75 mph on 614 miles of rural, limited access freeways. During the same period, the speed limits were increased from 55 mph to 65 ...
  • Impacts of CTfastrak on Real Estate and Urban Economic Development Phase 2
    Impacts of CTfastrak on Real Estate and Urban Economic Development: Phase 2
    Cohen, Jeffrey P ;
    Cui, Yunhe
    2022-06-30 | PDF
    CTfastrak, a bus rapid transit service connecting four municipalities (Hartford, West Hartford, Newington, and New Britain) in Central Connecticut (CT), opened for service in March 2015. This new service may be encouraging transit-oriented development (TOD) along the busway and these potential impacts of CTfastrak are expected to affect property va ...
  • Enhancing Freeway Safety Prediction Models Project Summary
    Enhancing Freeway Safety Prediction Models [Project Summary]
    Pratt, Michael P. ;
    Geedipally, Srinivas R.
    2022-06-30 | PDF
    The research team derived local calibration factors for models for urban freeway segments with 4–10 lanes and assessed the applicability of the 10-lane urban freeway model to freeway segments with 12 lanes. To accomplish this objective, the researchers assembled a database of about 2,400 urban freeway segments and over 80,000 crashes from the years ...
  • 3D StrutandTie Modeling for Design of Drilled Shaft Footings under Biaxial Eccentric Loading Project Summary
    3D Strut-and-Tie Modeling for Design of Drilled Shaft Footings under Biaxial Eccentric Loading [Project Summary]
    Bayrak, Oguzhan ;
    Yi, Yousun
    2022-06-30 | PDF
    This research identified that few studies on the application of the 3D STM to drilled shaft footings subjected to biaxial loading have been conducted. However, many biaxial load cases are considered when designing in-practice drilled shaft footings. While this project has added some refinements, most of the design recommendations proposed by Projec ...
  • Air Convection Embankment ACE Experimental Feature in Highway Construction Final Report Dalton Highway MP 209222 Reconstruction Project Construction of Road Embankments With Reduced ACE Shoulder TopWidths
    Air Convection Embankment (ACE) Experimental Feature in Highway Construction -Final Report Dalton Highway MP 209–222 Reconstruction Project, Construction of Road Embankments With Reduced ACE Shoulder Top-Widths
    Billings, Matt ;
    Berggren, Michael
    2022-06-30 | PDF
    The purpose of this experimental feature was to test the effectiveness of an insulated conventional embankment with reduced Air Convection Embankment (ACE) shoulder top-widths with varying top widths over a section of the Dalton Highway being realigned at MP 219 over thaw-unstable ice-rich permafrost in the foundation soils. This experimental featu ...
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