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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 1221 - 1240 of 36114 results
  • Base Stabilization Additives Effect on Granular Equivalency GE
    Base Stabilization Additives – Effect on Granular Equivalency (GE)
    Jibon, Md ;
    Mahedi, Masrur
    2024-05-01 | PDF
    Base stabilization additives are used to increase the strength and stiffness of road foundations on weak and susceptible soils. The Minnesota Department of Transportation (MnDOT) quantifies the structural contribution of pavement layers by introducing granular equivalency (GE) factors. While numerous additives exist for improving the performance of ...
  • Leveraging Abandoned Railroad Tunnels for Bat Conservation Fact Sheet
    Leveraging Abandoned Railroad Tunnels for Bat Conservation [Fact Sheet]
    Johnson, Joseph S ;
    Kuchta, Shawn R
    2024-05-01 | PDF
    This report summarizes a study on abandoned tunnels' importance to bat populations in Ohio. We located 50 tunnels and surveyed 40 of these for one or more winter season. Little brown myotis, big brown bats, and tricolored bats were the most commonly observed species, with varying preferences for tunnel features. Key predictors of bat use such as tu ...
  • Effects of Nontraditional Messages in Dynamic Message Signs on Improving Safety Compliance and Avoiding Distraction
    Effects of Nontraditional Messages in Dynamic Message Signs on Improving Safety, Compliance, and Avoiding Distraction
    Zhai, Yuhui ;
    Ouyang, Yanfeng
    2024-05-01 | PDF
    This project develops capability for future studies on the effects of nontraditional messages in dynamic message signs on improving driver safety and compliance and avoiding distractions. An online survey and a driving simulation game were designed, and a pilot run was conducted with a small number of students in the University of Illinois Urbana C ...
  • Updates to MechanisticEmpirical Design Inputs for Illinois Flexible Pavements
    Updates to Mechanistic-Empirical Design Inputs for Illinois Flexible Pavements
    Hajj, Ramez M ;
    Thompson, Marshall R.
    2024-05-01 | PDF
    This study reviews the Illinois Department of Transportation’s full-depth asphalt, limiting strain criterion, and asphalt over rubblized concrete design procedures, considering technological advancements in hot-mix asphalt—namely, the increased use of recycled materials and modified asphalt binders. The researchers evaluated the current |E*| algori ...
  • GroundIn Edge and Centerline Rumble Strip Rumble Stripe Evaluation and Best Practices Research Project Capsule 241SA
    Ground-In Edge and Centerline Rumble Strip / Rumble Stripe Evaluation and Best Practices: Research Project Capsule [24–1SA]
    Hassan, Hany ;
    Rupnow, Tyson
    2024-05-01 | PDF
    The primary objective of this research is to evaluate the pattern, placement, and noise level of the rumble strips/rumble stripes installed on Louisiana highways to ensure that the best standards are used.
  • Benefit Analysis of Barrier Inlet Screens
    Benefit Analysis of Barrier Inlet Screens
    Kerns, Justin ;
    Grimm, Alec
    2024-05-01 | PDF
    The Benefit Analysis of Barrier Inlet Screens research project studied the effectiveness of screening devices at preventing debris from entering stormwater inlets along highway barrier walls. This research was focused on large trash and debris, as opposed to sediment and dissolved solids. A variety of proprietary and non-proprietary screen devices ...
  • Robust Wireless Skin Sensor Networks for LongTerm Fatigue Crack Monitoring of Bridges Phase I Tech Transfer Summary
    Robust Wireless Skin Sensor Networks for Long-Term Fatigue Crack Monitoring of Bridges (Phase I) [Tech Transfer Summary]
    Laflamme, Simon
    ORCID ICON IMG
    2024-05-01 | PDF
    Develop sensing skin technology that can be deployed over strategic areas to detect, localize, and assess fatigue cracks • Provide sensing skin with autonomous capabilities, including power harvesting, onboard processing, and wireless transmission • Transform sensing skin signal into an index readily interpretable by infrastructure operators • Demo ...
  • Methods for Sealing Vertical Cracks on Concrete Structures Summary
    Methods for Sealing Vertical Cracks on Concrete Structures [Summary]
    Antunes, Rodrigo ;
    Sufian, Abu Ahmed
    2024-05-01 | PDF
    The objective of this study was to document best practices for sealing cracks in concrete structures, especially substructures, which cannot be routinely inspected.
  • Best Practices for Boulevard Tree Selection
    Best Practices for Boulevard Tree Selection
    Miller, Susan ;
    Siro, Lia
    2024-05-01 | PDF
    Communities seeking success in placemaking and improved green space in the boulevards are encouraged to develop a Street Tree Master Plan. In 2008, the Minnesota Local Road Research Board developed The Road to a Thoughtful Street Master Plan: A practical guide to systematic planning and design for communities to evaluate their goals and objectives ...
  • Estimation of Benefits from Pedestrian and Bicycle Improvements
    Estimation of Benefits from Pedestrian and Bicycle Improvements
    Tzamakos, Dionysios ;
    Stamatiadis, Nikiforos
    2024-05-01 | PDF
    Delivering safe mobility for all users of the transportation system is a key priority of the Kentucky Transportation Cabinet (KYTC). Because many system users rely on pedestrian and bicycle facilities, it is critical for KYTC to balance pedestrian and bicycle facility accommodations with those for motorized users. Currently, the Strategic Highway I ...
  • Design and Analysis of Resilient Vehicular Platoon Systems over Wireless Networks
    Design and Analysis of Resilient Vehicular Platoon Systems over Wireless Networks
    Shui, Tingyu ;
    Saad, Walid
    2024-05-01 | PDF
    Connected vehicular platoons provide a promising solution to improve traffic efficiency and ensure road safety. Vehicles in a platoon utilize on-board sensors and wireless vehicle-to-vehicle (V2V) links to share traffic information for cooperative adaptive cruise control. To process real-time control and alert information, there is a need to ensure ...
  • 2019 NonTraffic Surveillance System Coding and Validation Manual
    2019 Non-Traffic Surveillance System Coding and Validation Manual
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-05-01 | PDF
    The Non-Traffic Surveillance (NTS) system is a virtual data collection system of which one part is designed to gather data on fatalities and injuries that occur in nontraffic crashes, which can occur on private roads, driveways, and parking lots. The NTS program accepted potential crashes only from FARS analysts and from sampled Crash Report Sampli ...
  • Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa Tech Brief
    Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa [Tech Brief]
    Lee, Hosin “David”
    2024-05-01 | PDF
    The primary goal of this study is to develop an implementation plan for achieving more sustainable transportation infrastructure systems for Iowa DOT and local road agencies. The specific objective of this research is to develop a systemic methodology for identifying the best sustainable practices for implementation in transportation infrastructure ...
  • Performance and Design of Continuously Reinforced Concrete Pavements
    Performance and Design of Continuously Reinforced Concrete Pavements
    Sakulneya, Apidej ;
    Anderson, Connor
    2024-05-01 | PDF
    This report focuses on the calibration of a design framework for continuously reinforced concrete pavement (CRCP) developed in 2009 by using the most recent performance data acquired from existing CRCP sections in Illinois. Field performance data were used to update the fatigue damage to punchout model coefficients in the design framework. A sensit ...
  • The Impact of Diamond Grind Pavement Resurfacing on PM10 Emissions
    The Impact of Diamond Grind Pavement Resurfacing on PM10 Emissions
    Miech, Jason ;
    Aker, Saed
    2024-05-01 | PDF
    An assessment of tire-wear emissions was conducted to identify differences due to diamond ground and asphalt rubber asphalt concrete friction surfaces. The evaluation involved collecting representative aerosol samples from local freeways with both surface types under different meteorological conditions and with varying traffic conditions. The field ...
  • Test Procedure for Rapid Mix Design of CementTreated Base
    Test Procedure for Rapid Mix Design of Cement-Treated Base
    Sebesta, Stephen ;
    Taylor, Ross
    2024-05-01 | PDF
    SCOPE: 1.1 Tex-120-E consists of three parts. 1.1.1 Part I determines the moisture-density curve of material treated with cement. 1.1.2 Part II determines the target cement content using the unconfined compressive strength of samples molded in accordance with Tex-113-E and cured for 7 days. 1.1.3 Part III develops a laboratory mixture design for ce ...
  • Evaluation of Traffic Safety for Heavy Commercial Vehicles at Roundabouts in Minnesota
    Evaluation of Traffic Safety for Heavy Commercial Vehicles at Roundabouts in Minnesota
    Wagner, Mark ;
    DeVoe, Eric
    2024-05-01 | PDF
    Modern roundabouts have been shown to be one of the safest methods of control for at-grade intersections. An evaluation of traffic safety at roundabouts published by MnDOT in 2017 shows substantial decreases in fatal and serious injury crashes at intersections after installation of a roundabout. Despite these benefits, concerns have been raised fro ...
  • Effects of Legalization of Marijuana on Traffic Transportation Research Synthesis
    Effects of Legalization of Marijuana on Traffic: Transportation Research Synthesis
    CTC & Associates LLC
    2024-05-01 | PDF
    The legalization of recreational marijuana use in Minnesota in August 2023 prompted interest in the law’s potential impacts on traffic safety. MnDOT’s Office of Traffic Engineering requested this Transportation Research Synthesis (TRS) to learn from the experiences of other states with longer-standing laws legalizing the recreational use of marijua ...
  • Evaluating the Structural Properties and CostEffectiveness of GrapheneModified Asphalt Research Brief
    Evaluating the Structural Properties and Cost-Effectiveness of Graphene-Modified Asphalt [Research Brief]
    Senseney, Christopher T ;
    Tucker, Joseph L
    2024-05-01 | PDF
    The execution of this study involved laboratory testing, AASHTOWare Pavement ME design simulations, and LCCA of pavement designs with different asphalt pavement mixture scenarios. The asphalt binders with different GO dosages were subjected to a series of laboratory tests in the CDOT asphalt laboratory including the Dynamic Shear Rheometer (DSR), t ...
  • Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway Summary
    Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway [Summary]
    Kosar, Matthew ;
    Randell, Alexander
    2024-05-01 | PDF
    The objectives of this study were to update the FDOT vessel past point database that characterizes modern vessel traffic throughout navigable waterways in Florida and to develop updated models of future traffic projection.
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