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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 721 - 740 of 36841 results
  • Development of a Moisture Sensitivity Test for Asphalt Mixtures Technical Summary
    Development of a Moisture Sensitivity Test for Asphalt Mixtures [Technical Summary]
    Mohammad, Louay N.
    2025-06-01 | PDF
    Moisture-induced damage in asphalt pavements poses a significant concern for road agencies, affecting both long-term performance and driving safety. Most road agencies have relied on the Modified Lottman (ML) test, following the AASHTO T 283 standard, to assess the moisture susceptibility of asphalt mixtures. However, researchers have questioned th ...
  • Effect of SARA Asphalt Binder Fractionations on Laboratory Performance of Asphalt Mixtures Project Capsule
    Effect of SARA Asphalt Binder Fractionations on Laboratory Performance of Asphalt Mixtures [Project Capsule]
    Mohammaed, Louay ;
    Akentuna, Moses
    2025-06-01 | PDF
    The objective of this study is to evaluate the influence of asphalt binders possessing the same Performance Grade (PG) but differing in chemical composition as characterized by SARA fraction percentages on the mechanical performance of asphalt mixtures across high, intermediate, and low temperatures. Two sets of laboratory experiments will be condu ...
  • User Guide Interactive Online Map Value of Dedicated Right of Way
    User Guide: Interactive Online Map: Value of Dedicated Right of Way
    Minnesota. Department of Transportation. Research Services & Library
    2025-06-01 | PDF
    MnDOT research has developed a modeling tool that identifies the bus route segments that would benefit most from the installation of a dedicated right of way (ROW) for buses. Transit service reliability is one of the most requested service improvements. By implementing a transit ROW where needed most, MnDOT can improve transit reliability and bette ...
  • Assessment of LongTerm Performance of Louisiana Asphalt Pavements Summary
    Assessment of Long-Term Performance of Louisiana Asphalt Pavements [Summary]
    Mohammad, Louay N.
    2025-06-01 | PDF
    This study investigated the effectiveness of various enhanced asphalt mixture designs and construction techniques used in Louisiana since 1994, evaluating to what degree they improved long-term performance. 24 field projects were evaluated, focusing on how these enhancements impacted rutting, cracking, ride quality, and overall pavement performance ...
  • Developing and Characterizing SelfHealing Concrete for Bridge Decks
    Developing and Characterizing Self-Healing Concrete for Bridge Decks
    Banerji, Srishti ;
    Nazari, Mehrnoosh
    2025-06-01 | PDF
    This study investigates the self-healing potential of concrete with quicklime (CaO) aggregates, inspired by Roman concrete, to extend the service life of transportation infrastructure. Three concrete mixtures – control (0% quicklime), 2% quicklime (C-Q 2%), and 4% quicklime (C-Q 4%) – were tested for fresh properties, mechanical performance, durabi ...
  • Project Summary Active Transportation and Traveler Information
    Project Summary: Active Transportation and Traveler Information
    Minnesota. Department of Transportation
    2025-06-01 | PDF
    The Minnesota Department of Transportation (MnDOT)’s 511 Traveler Information System. It describes a concept to improve the provision of traveler information to active transportation users. The concept advocates for the inclusion of traveler information for all transportation modes, emphasizing the needs of active transportation users, including cy ...
  • Development of a Cyclic SemiCircular Bend Test to Evaluate Asphalt Mixture Crack Propagation Properties at Intermediate Temperature Summary
    Development of a Cyclic Semi-Circular Bend Test to Evaluate Asphalt Mixture Crack Propagation Properties at Intermediate Temperature [Summary]
    Mohammad, Louay N.
    2025-06-01 | PDF
    The Semi-Circular Bend (SCB) test has traditionally been conducted in a monotonic loading and displacement-controlled mode at intermediate temperatures to assess the fatigue crack resistance of asphalt mixtures. However, fatigue damage is essentially the deterioration of material integrity as a result of repeated loading. The monotonic loading of t ...
  • Development of a Process to Lower Global Warming Potential of Construction Materials
    Development of a Process to Lower Global Warming Potential of Construction Materials
    Cooper, Michelle A. ;
    Mukherjee, Amlan
    2025-06-01 | PDF
    The objective of this research was to support sustainable procurement of concrete pavements by linking materials-level global warming potential (GWP) to the project level. Infrastructure owners require reliable environmental product declarations (EPDs) and methodologies for integrating GWP into the procurement process to ensure equitable decision-m ...
  • Audible Alert and TMA Lighting Research Summary
    Audible Alert and TMA Lighting [Research Summary]
    Adu-Gyamfi, Yaw
    ORCID ICON IMG
    2025-06-01 | PDF
    Truck Mounted Attenuators (TMAs) are designed to mitigate crash severity. Currently, TMA drivers rely on visual checks via driving mirrors to manually trigger warnings thus placing the duty on drivers. To address this limitation, the Automated TMA Warning System (AutoTMA) replaces or augments manual driver interventions with an AI-enabled, sensor-f ...
  • Pedestrian Safety and Traffic Operations Near Transit Stops 2025
    Pedestrian Safety and Traffic Operations Near Transit Stops [2025]
    Singleton, Patrick A. ;
    Paskett, Aleks
    2025-06-01 | PDF
    This research project’s objective was to investigate the impacts of transit stop location (near-side versus far-side) on pedestrian safety and traffic operations at intersections. Three different video-based behavioral observation data collections at signals in Utah were utilized and studied: (1) transit stop events (interactions between transit ve ...
  • Assessing SpeedingRelated Crashes in Louisiana to Support to Safe System Approach Brief
    Assessing Speeding-Related Crashes in Louisiana to Support to Safe System Approach [Brief]
    Moomen, Milhan ;
    Rupnow, Tyson
    2025-06-01 | PDF
    The role of vehicle operating speed in traffic crashes is a complex issue, as speeding-related crashes continue to pose significant challenges. Speed greatly impacts both the frequency of crashes and the severity of the resulting injuries. Additionally, excessive speed raises the likelihood of losing control during evasive maneuvers and amplifies c ...
  • Groundwater Flooding on Highways in the Nebraska Sandhills Applying Remote Sensing Precipitation and Groundwater Modeling to Determine Depth Cause and Frequency
    Groundwater Flooding on Highways in the Nebraska Sandhills: Applying Remote Sensing, Precipitation and Groundwater Modeling to Determine Depth, Cause and Frequency
    Mittelstet, Aaron
    2025-06-01 | PDF
    Climate change significantly impacts infrastructure sustainability, particularly through shifts in precipitation patterns, intensity, and duration. These precipitation dynamics may increase the occurrence of surface water and groundwater flooding. Groundwater in the Nebraska Sand Hills (NSH), including the thickest portions of the High Plains Aquif ...
  • Concept of Operations Active Transportation and Travel Information System
    Concept of Operations: Active Transportation and Travel Information System
    AECOM
    2025-06-01 | PDF
    The Minnesota Department of Transportation (MnDOT)’s 511 Traveler Information System. It describes a concept to improve the provision of traveler information to active transportation users. The concept advocates for the inclusion of traveler information for all transportation modes, emphasizing the needs of active transportation users, including cy ...
  • Shear Wave Velocity Measurements Research Summary
    Shear Wave Velocity Measurements [Research Summary]
    Torgashov, Evgeniy V.
    2025-06-01 | PDF
    The Missouri Department of Transportation (MoDOT) commissioned SCI Engineering, Inc. to investigate cost-effective, non-intrusive geophysical methods for determining time-averaged shear wave velocity (Vs) profiles to a depth of 100 feet, based on anticipated updates to AASHTO seismic site classification specifications. Following a comprehensive lit ...
  • Taconite as a LowerCost Alternative High Friction Surface Treatment to Calcined Bauxite for Low Volume Roads in Minnesota
    Taconite as a Lower-Cost, Alternative High Friction Surface Treatment to Calcined Bauxite for Low Volume Roads in Minnesota
    Zanko, Lawrence M. ;
    Marasteanu, Mihai O.
    2025-06-01 | PDF
    Minnesota’s taconite (iron ore) mining industry can provide adequate or comparable skid resistance performance to calcined bauxite in high friction surface treatment (HFST)-type applications. Six pavement test sections approximately 1/10th of a mile (160 meters) in length were established at a low volume road location northwest of Duluth, Minnesota ...
  • Evaluating the Friction of Pavement Markings and Colored Pavement Research Summary
    Evaluating the Friction of Pavement Markings and Colored Pavement [Research Summary]
    Marasteanu, Mihai O. ;
    Peterson, Ethan
    2025-06-01 | PDF
    This Research Summary is part of the final deliverable for Report 2025-30, "Pavement Marking/Colored Pavement Friction Differential and Product Durability."
  • A New Generation of Porous Asphalt Pavement OGFC Support Study Technical Summary
    A New Generation of Porous Asphalt Pavement: OGFC Support Study [Technical Summary]
    Elseifi, Mostafa A.
    2025-06-01 | PDF
    The objective of this study was to develop and evaluate a new generation of open-graded friction courses (OGFC) that would provide superior durability performance while preserving the functional benefits of the mix. Additionally, a Finite Element (FE) model was developed and used to propose new air voids (AV) guidelines for OGFC applications in Lou ...
  • A New Generation of Porous Asphalt Pavement OGFC Support Study
    A New Generation of Porous Asphalt Pavement – OGFC Support Study
    Elseifi, Mostafa A. ;
    Abohamer, Hossam
    2025-06-01 | PDF
    The objective of this study was to develop and evaluate a new generation of open-graded friction courses (OGFC) that would provide superior durability performance while preserving the functional benefits of the mix. Additionally, a Finite Element (FE) model was developed and used to propose new air voids (AV) guidelines for OGFC applications in Lou ...
  • Evaluation of A Truck InCab Alert System
    Evaluation of A Truck In-Cab Alert System
    Goodall, Noah J. ;
    Lan, Chien-Lun
    2025-06-01 | PDF
    Transportation agencies have long communicated directly with truck drivers regarding weigh station compliance and parking availability, sometimes making use of applications provided by private third-party partners. One of these applications has expanded capabilities that allow agencies to transmit safety alerts directly to drivers through the in-ca ...
  • Behavior of the Expanded Polystyrene Elastic Inclusion at Integral Abutments
    Behavior of the Expanded Polystyrene Elastic Inclusion at Integral Abutments
    Tanyu, Burak F ;
    Guler, F Erol
    2025-06-01 | PDF
    This report presents the findings of a laboratory study conducted by the Sustainable Geotransportation/Geoenvironmental Infrastructure (SGI) Research Group at George Mason University. The research focused on investigating the ability of standard (S) and elasticized (E) expanded polystyrene (EPS) to provide elastic inclusion in integral abutments. E ...
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