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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 1861 - 1880 of 35865 results
  • Merging Multiple Existing Geotechnical Databases
    Merging Multiple Existing Geotechnical Databases
    Sun, Charlie ;
    Rister, Brad
    2023-06-01 | PDF
    This report discusses a project undertaken by Kentucky Transportation Center (KTC) researchers to create a comprehensive geotechnical database for highway planning, design, maintenance, and repair. The project consolidated multiple geotechnical data sources into a unified database accessible to Kentucky Transportation Cabinet (KYTC) staff, enabling ...
  • Assessment of the Mobility Energy Productivity MEP Metric for Transportation Applications in Florida
    Assessment of the Mobility Energy Productivity (MEP) Metric for Transportation Applications in Florida
    Jin, Xia ;
    Frolich, Daniel
    2023-06-01 | PDF
    This report outlines the use and application of the Mobility Energy Productivity (MEP) tool in evaluating the efficiency of transportation systems. The MEP metric assesses the quality of mobility in transportation systems, considering accessibility, energy consumption, and productivity. It incorporates time, cost, and energy-related measurements to ...
  • Environment for Testing and Assessing Infrastructure Support of Connected Vehicle and Cooperative Highway Automation Applications
    Environment for Testing and Assessing Infrastructure Support of Connected Vehicle and Cooperative Highway Automation Applications
    Hadi, Mohammed ;
    Mata, Hector
    2023-06-01 | PDF
    The consideration of cooperative driving automation (CDA) in the transportation system management and operations (TSM&O ) processes has the potential for improving system performance in terms of safety, mobility, environmental impacts, and user satisfaction and acceptance. The goal of this project is to provide recommendations regarding the incorpo ...
  • Design and Demonstration of an ArterialFriendly Local Ramp Metering Control System
    Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System
    Ke, Zemian ;
    Liu, Jiachao
    2023-06-01 | PDF
    This project aims to develop, assess, and optimize control strategies for ramp metering and local signal synchronization in Maryland's Transportation Systems Management and Operations (TSMO) 1 system (I-70 corridor east of Baltimore, MD). The methodology and mesoscopic simulation model can be generally applicable to other networks and TSMO systems. ...
  • Analytic Tools for Locating Sizing and Evaluating Electric Vehicle Charging Stations
    Analytic Tools for Locating, Sizing, and Evaluating Electric Vehicle Charging Stations
    Coenen, Steffen ;
    Aemmer, Zack
    2023-06-01 | PDF
    The Washington State Legislature directed the Department of Transportation to develop analytic tools “to enable coordinated, effective, efficient, and timely deployment of charging and refueling infrastructure necessary to support statewide and local transportation electrification efforts that result in emissions reductions” consistent with state g ...
  • Phase I Before Study Evaluation of Interstate 4 I4 Floridas Regional Advanced Mobility Elements FRAME Project Before Analysis Summary
    Phase I: Before Study Evaluation of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) Project (Before Analysis) [Summary]
    Ponnaluri, Raj ;
    Abdel-Aty, Mohamed
    2023-06-01 | PDF
    The best way to find out if a transportation research project was meaningful is to check the numbers. The Florida Department of Transportation is laying the foundation to do that with a massive new undertaking that aims to capture safety and mobility conditions along Interstate 4 (I-4) from Orlando to Tampa.
  • Evaluation of SaturatesAromaticsResinsAsphaltenes SARA Fractionation of Asphalt Binders in Louisiana Research Project Capsule 221B
    Evaluation of Saturates/Aromatics/Resins/Asphaltenes (SARA) Fractionation of Asphalt Binders in Louisiana: Research Project Capsule [22-1B]
    Salari, Saman ;
    Mayeux, Corey R
    2023-06-01 | PDF
    The objective of this research is to evaluate the characterization of asphalt binder through TLC/FID testing and SARA grouping. The results will be further analyzed and compared with the available GPC results and other available characterizations of the asphalt binders. Furthermore, the results will be correlated with performance.
  • Effect of Fillers on the Moisture Resistance and Performance of HMA Research Project Capsule 231B
    Effect of Fillers on the Moisture Resistance and Performance of HMA: Research Project Capsule [23–1B]
    Elseifi, Mostafa ;
    Rupnow, Tyson
    2023-06-01 | PDF
    The main objectives of the proposed study are two-fold: 1. To evaluate the effects of various types of inert and active fillers on the moisture resistance and laboratory performance of asphalt mixtures. 2. To propose change to the specifications to optimize the use of mineral fillers in hot-mix asphalt (HMA).
  • Assessing the Economic Impact of Speed Limit Changes on Safety and Mobility in California
    Assessing the Economic Impact of Speed Limit Changes on Safety and Mobility in California
    Musabbir, Sarder Rafee ;
    Zhang, Michael
    2023-06-01 | PDF
    This project estimates the safety and mobility impact of changing speed limits on California highways. The safety impact is estimated using statistical models to predict the change in the frequency of all crashes and fatal-or-severe crashes that would result by varying the design speed (85th percentile speed). Statewide crash and traffic data (from ...
  • Feasibility of NonProprietary UltraHigh Performance Concrete UHPC For Use in Highway Bridges in Montana Implementation
    Feasibility of Non-Proprietary Ultra-High Performance Concrete (UHPC) For Use in Highway Bridges in Montana: Implementation
    Berry, Michael ;
    Hendricks, Elias
    2023-06-01 | PDF
    Previous research conducted at MSU developed a nonproprietary UHPC mix design (MT-UHPC) that is significantly less expensive than commercially available mixes and is made with materials readily available in Montana. The focus of the research discussed herein was on the field implementation of MT-UHPC. Specifically, MT-UHPC was used in all field-cas ...
  • BIM Standards for Roads and Related Transportation Assets
    BIM Standards for Roads and Related Transportation Assets
    Hang, Li ;
    Hegazy, Hosam
    2023-06-01 | PDF
    With the industry foundation classes (IFC) building information modeling (BIM) standard (ISO 16739) being adopted by AASHTO as the national standard for modeling bridge and road infrastructure projects, there comes a great opportunity to upgrade the INDOT model development standard of roads and related assets to 2D+3D BIM. This upgrade complies wit ...
  • Data Interpretation of Automated Plate Load Test APLT for RealTime In Situ Determination of Unbound Layer Resilient Modulus
    Data Interpretation of Automated Plate Load Test (APLT) for Real-Time In Situ Determination of Unbound Layer Resilient Modulus
    Pajo, Bianka ;
    Becker, Peter
    2023-06-01 | PDF
    This project examined the results of an extensive program of (1) cyclic plate loading tests carried out at Purdue University’s S-BRITE site on two testing strips comprised of a coarse aggregate (Indiana #53) subbase layer compacted over either untreated or cement-stabilized subgrade, and (2) static loading tests conducted on #53 aggregate compacted ...
  • Determining State and Federal Transportation Responsibilities to Residents on Islands
    Determining State and Federal Transportation Responsibilities to Residents on Islands
    Zockaie, Ali ;
    Jazlan, Farish
    2023-06-01 | PDF
    Michigan has the second-longest coastline after Alaska, with approximately 15,000 residents inhabiting the top 5 populous islands in Michigan water bodies. To provide mobility equity, the residents of these islands are expected to have equal access to work, healthcare, emergency services, and economic opportunities as the mainland residents. Four M ...
  • Simplified Analysis Methods of TSD and FWD Data for Effective Pavement Preservation Program
    Simplified Analysis Methods of TSD and FWD Data for Effective Pavement Preservation Program
    Kassem, Emad ;
    Muftah, Ahmed
    2023-06-01 | PDF
    Pavement evaluation is critical for determining proper and cost-effective surface treatments and allocation of limited funds and resources to maintain, rehabilitate and reconstruct flexible pavements. This study examined two nondestructive testing devices that are used to evaluate the structural capacity and integrity of highway pavements including ...
  • Developing Enhanced Performance Curves of ITD Asphalt Pavements by Mining the Historical Data
    Developing Enhanced Performance Curves of ITD Asphalt Pavements by Mining the Historical Data
    Deng, Yong ;
    Shi, Xianming
    2023-06-01 | PDF
    Current ITD approach to predict asphalt pavement performance over-simplifies the dynamic and nonlinear nature of pavement deterioration and fails to account for complexities in the pavement condition. As such, this project aimed to develop reliable, realistic and enhanced performance curves for ITD asphalt pavements by mining the historical data. T ...
  • Performance of CostEffective NonProprietary UHPC in ThinBonded Bridge Overlays
    Performance of Cost-Effective Non-Proprietary UHPC in Thin-Bonded Bridge Overlays
    Khayat, Kamal H. ;
    Teng, Le
    2023-06-01 | PDF
    The constructability and performance of non-proprietary thixotropic UHPC for thin bonded bridge deck overlay construction was investigated. Task 1 reviewed literature on UHPC for thin bonded overlays and non-proprietary UHPC. Crack monitoring of experimental slabs cast with UHPC thin bonded overlay (MoDOT project TR201704) and pull-off bond strengt ...
  • Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Khosravifar, Arash ;
    Dusicka, Peter
    2023-06-01 | PDF
    The potential Cascadia Subduction Zone (CSZ) megathrust earthquake is recognized as one of the major natural hazards affecting the Pacific Northwest of the United States. The estimation of expected ground-motions is complicated by the long-duration motions from CSZ as well as site effects from deep sedimentary basins in northwest Oregon. This study ...
  • Smart Mobility Blueprint for Illinois
    Smart Mobility Blueprint for Illinois
    Jayme, Angeli ;
    Usta, Berkan
    2023-06-01 | PDF
    Connected, automated, shared, and electric (CASE) technologies have invoked Mobility 4.0—a connected, digitized, multimodal, and autonomous system of systems. This project established a flexible and adaptable blueprint that would streamline multidisciplinary and multistakeholder efforts as well as leverage available resources to prepare the Illinoi ...
  • Centerline Rumble Strip Effects on Pavement Performance
    Centerline Rumble Strip Effects on Pavement Performance
    Coleri, Erdem ;
    Chitnis, Vipul
    2023-06-01 | PDF
    Despite numerous research studies inspecting the safety benefits of CLRS on pavements, there has been limited exploration into the impact on pavement durability as a result of the installation of CLRS. The major purpose of this study was to corroborate what specific factors are controlling the cracking failures due to the installation of CLRS and f ...
  • Assessment of Motorcycle Safety in Wyoming Fatal and Severe Crashes Contributing Factors and Potential Countermeasures Addendum
    Assessment of Motorcycle Safety in Wyoming: Fatal and Severe Crashes, Contributing Factors and Potential Countermeasures [Addendum]
    Zlatkovic, Milan ;
    Baah, Isaac
    2023-06-01 | PDF
    Motorcycle riders and passengers are much more likely to be killed or severely injured in a crash, and on average about 15 percent of all traffic fatalities include motorcyclists. Motorcyclists and their passengers are particularly vulnerable on the roads, which accounts for their higher percentage of fatal and severe crash accidents. To take appro ...
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