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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 481 - 500 of 36841 results
  • Evaluation of Structural Fillers for Steel Grouting in Steel Bridge Preventive Maintenance and Repairs
    Evaluation of Structural Fillers for “Steel Grouting” in Steel Bridge Preventive Maintenance and Repairs
    Provines, Jason T. ;
    Starr, Joshua
    2025-10-01 | PDF
    In some instances, steel bridges can contain gaps between steel plates in bolted connections or between steel and concrete surfaces. In new bridges, these gaps may result from fabrication or assembly errors. In existing structures, the gaps often arise because of corrosion-related section loss. These gaps can also cause durability concerns because ...
  • Update on Evaluating the Magnitude and Time Rate of Consolidation Settlement of Embankments and Other Piezocone Penetration Tests PCPT Project Capsule
    Update on Evaluating the Magnitude and Time Rate of Consolidation Settlement of Embankments and Other Piezocone Penetration Tests (PCPT) [Project Capsule]
    Abu-Farsakh, Murad Y.
    2025-10-01 | PDF
    The construction of embankments and other infrastructure elements over saturated, compressible, cohesive soft soils in Louisiana presents significant geotechnical design challenges due to anticipated large magnitudes of consolidation settlement and slow rates of consolidation. Inaccurate estimation of these deformations can lead to significant diff ...
  • NonCantilever Fatigue RemainingLife Simulation Software Using Probabilistic Wind Model for All Counties in Kansas Technical Summary
    Non-Cantilever Fatigue Remaining-Life Simulation Software Using Probabilistic Wind Model for All Counties in Kansas [Technical Summary]
    Al Shboul, Khalid W ;
    Rasheed, Hayder A.
    2025-10-01 | PDF
    This study used finite element shape functions to conduct spatial interpolation of wind-speed records for all Kansas counties (Al Shboul et al., 2023). This method considered spatial correlations among boundary sites. Artificial wind-time histories were constructed for each day for the entire 45-year study period, and the number of cycles developed ...
  • Interstate 64 Pavement Recycling Instrumentation and Monitoring
    Interstate 64 Pavement Recycling Instrumentation and Monitoring
    Ruiz, Carolina Benavides ;
    Flintsch, Gerardo W.
    2025-10-01 | PDF
    During the past two decades, the implementation of pavement recycling techniques, such as cold central plant recycling and full-depth reclamation, for pavement rehabilitation and construction in the United States has been driven by positive performance and the opportunity for significant cost and environmental savings. However, these recycling tech ...
  • NondestructiveNoncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls Volume I
    Nondestructive/Noncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls, Volume I
    Maghiar, Marcel ;
    Maldonado, Gustavo O.
    2025-10-01 | PDF
    This volume is the first in a series. The other volume in the series is FHWA-GA-25-2217 Volume II. As Mechanically Stabilized Earth and Modular Block retaining walls age within Georgia's highway infrastructure, their stability and safety are critical concerns. Currently, unlike bridges, these retaining walls lack standardized inspection protocols, ...
  • Digital Delivery Roadmap for Implementing Building Information Model BIM for Infrastructure at GDOT
    Digital Delivery: Roadmap for Implementing Building Information Model (BIM) for Infrastructure at GDOT
    Ashuri, Baabak ;
    Lee, SeungYeon
    2025-10-01 | PDF
    As transportation agencies transition toward more data-driven and collaborative project delivery, the Georgia Department of Transportation (GDOT) has initiated a strategic effort to define and implement digital delivery. This research develops a comprehensive roadmap for GDOT based on an integrated methodology that combines internal interviews, a s ...
  • Scaling Matching and Variability Effects of Ground Motion Selection in Performance Uncertainty
    Scaling, Matching, and Variability: Effects of Ground Motion Selection in Performance Uncertainty
    Yang, Ya-Heng ;
    Becker, Tracy C.
    2025-10-01 | PDF
    The selection of ground motions for time series analysis of structures remains a topic of considerable debate. While both time domain method and spectral matching are permitted by the Caltrans Seismic Design Criteria (SDC), the implications of the choice are not fully understood. To explore and compare how these different modification methodologies ...
  • Curving and Running Resistance of Freight Trains Current Experience with OnTrack Measurements
    Curving and Running Resistance of Freight Trains: Current Experience with On-Track Measurements
    Michalek, Tomas ;
    Kohout, Martin
    2025-10-01 | PDF
    Curving resistance affects the railway vehicle running through curves. For its estimation in train dynamics calculations, different empirical formulas are used in various countries. It is practically impossible to determine its exact value because of its dependency on various – to some extent random – parameters. In the framework of the experimenta ...
  • Best Practices for Structuring and Managing Statewide ResourceTracking Databases
    Best Practices for Structuring and Managing Statewide Resource-Tracking Databases
    Sullivan, Kenneth T. ;
    Hurtado, Kristen
    2025-10-01 | PDF
    The Arizona Department of Transportation (ADOT) is working to modernize its financial tracking systems to improve transparency, compliance, and efficiency in managing federally funded transportation projects. Existing tools, including the Resource Administration database and related systems, operate independently, and require extensive manual data ...
  • Effectiveness of MagnesiumAluminoLiquid PhosphateBased Concrete as a Repair Material
    Effectiveness of Magnesium-Alumino-Liquid Phosphate-Based Concrete as a Repair Material
    Darwin, David ;
    O’Reilly, Matthew
    2025-10-01 | PDF
    A proprietary magnesium-alumino-liquid-phosphate (MALP) concrete, manufactured by Phoscrete Corporation, is a rapid-setting repair material promoted for its ability to bond with portland cement concrete and protect reinforcing steel against corrosion. A related product, magnesium-potassium-phosphate (MKP) concrete, offers slower setting for easier ...
  • Assessing Transportation Infrastructure Risk
    Assessing Transportation Infrastructure Risk
    Yang, David ;
    Khosravifar, Arash
    2025-10-01 | PDF
    A report by Portland State University (PSU) researchers offers an improved framework for assessing the seismic risk of transportation structures. Earthquake preparedness is a high priority for the Pacific Northwest, and cities and state agencies will benefit from having a more accurate and consistent way to prepare.
  • Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic MOT Improvements Brief
    Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements [Brief]
    Bullock, Darcy M.
    ORCID ICON IMG
    2025-10-01 | PDF
    Over the past 18 months, the team has performed several dozen after-action reviews of interstate work zones and the associated maintenance of traffic (MOT). These after-action reports generally contain the following information: Date, location, visual images, connected vehicle summary graphics, qualitative discussion of activity, and in some cases ...
  • Effectiveness of Wildlife Fencing at Reducing Crashes
    Effectiveness of Wildlife Fencing at Reducing Crashes
    Shea, Scott ;
    Goswamy, Amrita
    2025-10-01 | PDF
    Wildlife-vehicle collisions (WVCs) pose serious risks to motorist safety and contribute significantly to wildlife mortality. Wildlife fencing serves as a proven countermeasure to mitigate WVCs while promoting habitat connectivity. This study evaluates the safety effectiveness of wildlife fencing installed across Utah from 2011 to 2023, using traffi ...
  • Soil Amendment Guidance for Infiltration and Stormwater Treatment
    Soil Amendment Guidance for Infiltration and Stormwater Treatment
    Mohanty, Sanjay K. ;
    Stenstrom, Michael K.
    2025-10-01 | PDF
    Pollutants from roadway runoff are the leading cause of surface water impairments. Thus, treatment of road runoff by building roadside stormwater best management practices (BMPs) could prevent pollution and turn the road infrastructure into a sustainable water solution. However, limited infiltration in compacted roadside soil poses a significant ch ...
  • Strategies for Improved Driver Behavior within Work Zones
    Strategies for Improved Driver Behavior within Work Zones
    Mishra, Sabyasachee ;
    Golias, Mihalis
    2025-10-01 | PDF
    Work zones (WZs) are among the most hazardous roadway environments due to restricted geometry, temporary traffic control, and increased driver workload, which often lead to speeding and elevated crash frequency as well as severity. A section of roadway of nearly 8 miles long on I-65, in Robertson County, near the Kentucky state border, where additi ...
  • Evaluating the Impacts of I24 Smart Corridor Strategies
    Evaluating the Impacts of I-24 Smart Corridor Strategies
    Gu, Yangsong ;
    Han, Lee D.
    2025-10-01 | PDF
    The I-24 Smart Corridor project, launched by TDOT since 2018, is a first-ever Smart Corridor study in Tennessee. This project integrates I-24 and SR-1, a parallel arterial roadway, with physical, technological, and operational enhancements to provide road users with accurate, real-time information and actively manage traffic. The I-24 project is co ...
  • Using Infrastructure to Boost Safety in a PNT World Balancing Reliability Overreliance Malfunction Risks and Cybersecurity to Improve Intersection Safety
    Using Infrastructure to Boost Safety in a PNT World: Balancing Reliability, Overreliance, Malfunction Risks, and Cybersecurity to Improve Intersection Safety
    Haddad, Angela J. ;
    Bhat, Chandra R.
    2025-09-30 | PDF
    Cooperative perception broadens the sensing range of an automated vehicle, especially in urban settings where other road users and infrastructure create occlusions. However, it raises safety concerns because received information can be incorrect due to faults or malicious attacks, which can lead to unsafe planning. We study object-level fusion stra ...
  • Slope Restoration on Urban Freeways
    Slope Restoration on Urban Freeways
    Cregg, Bert M.
    ORCID ICON IMG
    2025-09-30 | PDF
    Improving the diversity of roadside plantings can provide an array of benefits including improved aesthetics, improved driver safety, and increased biodiversity. However, establishing landscape plants along roadsides can often be difficult due to a variety of soil related and other environmental factors. In an earlier trial, researchers from Michig ...
  • Electromagnetic Detection and Identification of Concrete Cracking in Highway Bridges
    Electromagnetic Detection and Identification of Concrete Cracking in Highway Bridges
    Yu, Tzuyang
    2025-09-30 | PDF
    The primary focus of our research is to address the challenge of evaluating aging concrete bridges, both reinforced and prestressed, located in New England. We have developed a remote radar sensor capable of characterizing corroded reinforced concrete structures, as well as a predictive capability to generate artificial cracks and simulate radar im ...
  • Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends
    Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends
    Attanayake, Upul ;
    Bhowmik, Sanjoy
    2025-09-30 | PDF
    The Michigan Department of Transportation (MDOT) identified significant deterioration at the ends of steel and prestressed concrete (PSC) beams, requiring systematic evaluation and improved decision-making protocols for Requests for Action (RFAs). This comprehensive study examined 431 steel beam ends and 267 PSC bridges to develop capacity-based as ...
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