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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 3621 - 3640 of 36908 results
  • The Evolving Texas Megaregion Developing a Sustainable Megaregion Mobility Planning Blueprint
    The Evolving Texas Megaregion: Developing a Sustainable Megaregion Mobility Planning Blueprint
    Loftus-Otway, Lisa ;
    Bashar, Samira Binte
    2021-10-01 | PDF
    With the megaregional trend growing in the U.S., it is becoming increasingly important to recognize and reorient the scale of the mobility planning towards the megaregions for sustainable and equitable growth of regions. In 2013, European Union developed a new transportation planning process called Sustainable Urban Mobility Planning (SUMP). The ra ...
  • Load Rating of Existing Continuous Stringers on Louisianas Bridges
    Load Rating of Existing Continuous Stringers on Louisiana’s Bridges
    Sun, C. Shawn ;
    Linzell, Daniel G.
    2021-10-01 | PDF
    Some of Louisiana’s bridges built in the 1950s and 1960s used two-girder or truss systems, in which floor beams are carried by main members and continuous (spliced) stringers are supported by the floor beams. The main members are either two edge (fascia) girders or trusses. Stringer bottom flanges are in compression at the negative moment region, w ...
  • MASH Test 311 on FShape Portable Concrete Barrier With XBolt Connection
    MASH Test 3–11 on F-Shape Portable Concrete Barrier With X-Bolt Connection
    Bligh, Roger P. ;
    Menges, Wanda L.
    2021-10-01 | PDF
    An implementation agreement was adopted by the American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration that coincided with the publication of the second edition of the AASHTO Manual for Assessing Safety Hardware (MASH). Subsequently, numerous roadside safety devices have been crash tested t ...
  • LifeCycle Impact Assessment of Recycled Pavement Projects in Virginia
    Life-Cycle Impact Assessment of Recycled Pavement Projects in Virginia
    Amarh, Eugene A ;
    Katicha, Samer W
    2021-10-01 | PDF
    This report describes a study conducted to evaluate the performance and quantify the potential environmental benefits of recycled asphalt pavement projects completed in Virginia. The performance of the recycled projects was assessed by evaluating collected stiffness data and by the development of performance prediction models based on data obtained ...
  • Development of RiskBased Protocol for KDOT Construction Inspection
    Development of Risk-Based Protocol for KDOT Construction Inspection
    Tran, Dan ;
    Mohamed, Mamdouh
    2021-10-01 | PDF
    State Departments of Transportation (DOTs) have been facing a challenge of shrinking budgets and substantial reductions in both the numbers and experience levels of inspectors over the last decade. Many state DOTs, including the Kansas Department of Transportation (KDOT), have lost experienced construction inspection staff while the numbers of proj ...
  • Determination of Fatigue Resistance of Coupler Connections in Aluminum Overhead Truss Structures
    Determination of Fatigue Resistance of Coupler Connections in Aluminum Overhead Truss Structures
    Yu, Danqing ;
    Bennett, Caroline
    2021-10-01 | PDF
    Overhead truss sign structures (OHTSS) are widely used over highways across the nation. An overhead truss sign structure is comprised of a truss and two supporting frames at each end, and can be made using aluminum or steel. Aluminum overhead truss sign structures are generally more prone to vibration issues due to their light weight (Fouad et al. ...
  • Achieving Excellence for Californias Freight System Developing Competitiveness and Performance Metrics Incorporating Sustainability Resilience and Workforce Development
    Achieving Excellence for California’s Freight System: Developing Competitiveness and Performance Metrics Incorporating Sustainability, Resilience, and Workforce Development
    Ke, Jian-yu ;
    Prager, Fynnwin
    2021-10-01 | PDF
    This study explores the question of whether California's freight system is staying competitive with other US regions. A novel analytical framework compares supply chain performance metrics across multiple US states and regions for seaports, airports, highways, freight rail service, and distribution centers by combining the Performance Evaluation Ma ...
  • Methods for Evaluation of the Remaining Shear Capacity in Steel Bridge Beams With Section Losses Attributable to Corrosion Damage
    Methods for Evaluation of the Remaining Shear Capacity in Steel Bridge Beams With Section Losses Attributable to Corrosion Damage
    Javier III, Eulogio M ;
    Hebdon, Matthew H
    2021-10-01 | PDF
    Steel bridges commonly have corrosion at beam ends because of leaking joints, which provide a pathway for de-icing salts to fall onto the beams from the roadway above. Once beam ends have corrosion damage, it becomes more difficult to determine their remaining shear capacity to be used for load rating. This is because classical design equations are ...
  • Understanding Florida Motorcycle Crashes and Injury Outcomes Using the Motorcycle Crash Causation Study MCCS Dataset
    Understanding Florida Motorcycle Crashes and Injury Outcomes Using the Motorcycle Crash Causation Study (MCCS) Dataset
    Lee, Chanyoung ;
    Wang, Zhenyu
    2021-10-01 | PDF
    With the Motorcycle Crash Causation Study (MCCS) dataset mapped to the Florida crash database, an effort to obtain a complementary understanding and knowledge of characteristics related to locational, temporal, trip, motorcycle, injury, and contributing crash factors by most harmful event was conducted to lead to informed decision-making by the Flo ...
  • Internal Curing of Bridge Decks and Concrete Pavement To Reduce Cracking
    Internal Curing of Bridge Decks and Concrete Pavement To Reduce Cracking
    Pacheco, Jose ;
    Vaddey, Pavan
    2021-10-01 | PDF
    This research project focused on evaluating the performance of internally cured concrete mixtures for bridge deck and pavement with the aim of reducing volumetric changes, i.e., cracking and warping. The specific tasks conducted in this project include a literature review of internal curing technology and experiences in the US, a survey of existing ...
  • Developing Statewide Land Use Forecasting Model and Integrate with TDOTs Statewide Travel Demand Model
    Developing Statewide Land Use Forecasting Model and Integrate with TDOT’s Statewide Travel Demand Model
    Mishra, Sabyasachee ;
    Golias, Mihalis
    2021-10-01 | PDF
    In this research, a statewide forecasting land-use model is presented. The land-use model is called the Large-Scale Land Use Model (LS-LUM)and can be integrated with Tennessee Statewide Travel Demand Model (TSMv3). Massive data collection was followed in this project and households ’information, employment information, housing information was colle ...
  • Mechanical Properties of Durable Pavement Marking Materials and Adhesion on Asphalt Surfaces
    Mechanical Properties of Durable Pavement Marking Materials and Adhesion on Asphalt Surfaces
    Jo, Hyungyung ;
    So, Hyeyoung
    2021-10-01 | PDF
    Mechanical properties of commercially available temporary pavement marking (TPM) tapes and thermoplastic materials used as permanent pavement markings (PPM) were investigated using the non-destructive Tape Drape Test and conventional mechanical testing. The impact of temperature and aging on the adhesion of TPM tapes and thermoplastic PPM applied t ...
  • Mechanistic Load Restriction Decision Platform for Pavement Systems Prone to Moisture Variations
    Mechanistic Load Restriction Decision Platform for Pavement Systems Prone to Moisture Variations
    Ghayoomi, Majid ;
    Dave, Eshan
    2021-10-01 | PDF
    Excessive moisture influences pavement performance by increasing surface deflection and decreasing bearing capacity. Seasonal fluctuation of groundwater, flooding, and spring thaw can all lead to changes in soil moisture and consequently stress states. Load restriction during and after inundation plays a key role in service life and maintenance pla ...
  • Developing the Concept of Operations for a Mobile Application To Interface With a Central Traffic Signal System
    Developing the Concept of Operations for a Mobile Application To Interface With a Central Traffic Signal System
    Azra, Nuzhat ;
    Bassett, David
    2021-10-01 | PDF
    This report summarizes tasks performed toward the development of a Concept of Operations (ConOps) for a mobile/smartphone application designed to assist pedestrians with disabilities when crossing the street at signalized intersections. This app, if developed and rolled out, will interact directly with the traffic signal system controlling the inte ...
  • Textured Epoxy Coated and Galvanized Reinforcement To Reduce Cracking in Concrete Bridge Decks and Components
    Textured Epoxy Coated and Galvanized Reinforcement To Reduce Cracking in Concrete Bridge Decks and Components
    Ross, Brandon ;
    Poursaee, Amir
    2021-10-01 | PDF
    The objective of this project was to evaluate the influence of different reinforcing bar surface coatings on crack control performance. Five different reinforcing bar coatings were used: black (uncoated), conventional (smooth) epoxy, textured-epoxy, hot-dipped galvanized, and continuously galvanized coatings. Five different series of laboratory tes ...
  • Effectiveness of Spot Tamping in FineFilled Ballast Research Results
    Effectiveness of Spot Tamping in Fine-Filled Ballast [Research Results]
    Baillargeon, Jay ;
    Woody, Stephen (Sean)
    2021-10-01 | PDF
    The team sought to explore the effectiveness of spot tamping in fine-filled ballast as part of a larger project that studied the effect of moisture and maintenance in fine-filled ballast at the FAST Rainy Section.
  • Domestic Airline Fares Consumer Report Second Quarter 2021 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Second Quarter 2021 Passenger and Fare Information
    United States. Department of Transportation
    2021-10-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Full Depth Reclamation With Thin Surface Treatment for Low Volume Road Maintenance
    Full Depth Reclamation With Thin Surface Treatment for Low Volume Road Maintenance
    Nair, Harikrishnan ;
    Diefenderfer, Brian K
    2021-10-01 | PDF
    The Virginia Department of Transportation (VDOT) maintains more than 100,500 lane-miles of pavement on the secondary network. Of this total, more than 95% of the lane-miles have an annual average daily traffic of less than 3,500 vehicles. Pavement recycling techniques (such as full depth reclamation [FDR] and cold in-place recycling) can be used to ...
  • Bridge Deck Cracking Evaluation
    Bridge Deck Cracking Evaluation
    Nelson, Todd ;
    Pham, Le
    2021-10-01 | PDF
    Transverse cracking of concrete bridge decks continues to be an issue for the Montana Department of Transportation (MDT) and is considered a common issue reported among many state departments of transportation (DOTs). In the last 25 years with the introduction of high performance concrete (HPC) in bridge decks to lower permeability and with the use ...
  • Driver Performance and Behavior in Adverse Weather Conditions Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results Phase 3
    Driver Performance and Behavior in Adverse Weather Conditions: Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results - Phase 3
    Ahmed, Mohamed ;
    Das, Anik
    2021-10-01 | PDF
    The negative impact of adverse weather conditions on traffic safety and operation is the primary focus of many studies. However, in-depth investigations of driver behavior and performance during adverse weather at a trajectory level using naturalistic driving data are limited. Over the years, researchers have utilized aggregate traffic and weather ...
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