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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 2201 - 2220 of 35888 results
  • Use of Concrete Grinding Residue as a Soil Amendment
    Use of Concrete Grinding Residue as a Soil Amendment
    Bollinger, Patrick E B ;
    Jibon, Md
    2023-01-01 | PDF
    Concrete diamond grinding on pavement projects generates a nonhazardous waste byproduct called concrete grinding residue (CGR). CGR has known cementitious characteristics that suggest a latent use as a soil-stabilizing amendment, especially for poor and problematic soils. In this study, Western Iowa loess soil was amended with CGR and subjected to ...
  • Safe and CostEffective Reduction of Load Postings for South Carolina Bridges
    Safe and Cost-Effective Reduction of Load Postings for South Carolina Bridges
    Ziehl, Paul ;
    Cousins, Tommy
    2023-01-01 | PDF
    South Carolina has over 9,000 bridges in its inventory, many of which were designed for H10 or H15 truck loads. Precast reinforced concrete flat slabs are the primary bridge type addressed. These components were chosen in consultation with SCDOT due to their prevalence in the bridge inventory and resolving associated performance issues will therefo ...
  • SCDOT Scope of Services Template Research
    SCDOT Scope of Services Template Research
    Bausman, Dennis ;
    Mousavi, Ehsan
    2023-01-01 | PDF
    In the United States, federal, state, and local governments are responsible for addressing their residents' transportation infrastructure needs. Similar to most State Departments of Transportation (State DOTs), the South Carolina Department of Transportation (SCDOT) is responsible for owning, operating, and maintaining a large transportation system ...
  • Estimating HCM Default Parameters for Louisiana Research Project Capsule 233SS
    Estimating HCM Default Parameters for Louisiana: Research Project Capsule [23-3SS]
    Rahman, Ashifur ;
    Rupnow, Tyson
    2023-01-01 | PDF
    The primary objective of this research is to develop intersection capacity parameters that are specific to Louisiana conditions. More specifically, the research aims to estimate the saturation flow rate for selected signalized intersections and analyze critical headway and follow-up headway at stop-controlled intersections.
  • Development of a PerformanceRelated Test for Designing Seal Coats Final Report
    Development of a Performance-Related Test for Designing Seal Coats: Final Report
    Masad, Ahmad ;
    Adwani, Dheeraj
    2023-01-01 | PDF
    TxDOT’s seal coat program is critical to preserving its existing roadway infrastructure and ensuring roadways retain adequate skid resistance. However, sometimes seal coats fail prematurely due to factors such as incompatibility between aggregate and binder and/or binder that has poor durability while meeting other specification requirements. Seal ...
  • Evaluation of Left Shoulder as Parttime Travel Lane Design Alternatives and Transportation Management Center Staff Training Module Development
    Evaluation of Left Shoulder as Part-time Travel Lane Design Alternatives and Transportation Management Center Staff Training Module Development
    Deng, Zhuohang ;
    Luo, Zhiliang
    2023-01-01 | PDF
    Permanent capacity expansion, such as adding new lanes, is no longer a viable strategy to address traffic congestion in California; hence, ITS (Intelligent Transportation System) strategies, such as part-time use of the shoulder as a travel lane, need to be explored. The use of the shoulder as a travel lane during peak traffic hours has limited app ...
  • TRACtion Transformative Transportation an Introduction
    TRACtion: Transformative Transportation – an Introduction
    University of California, Los Angeles. Institute of Transportation Studies  ...
    2023-01-01 | PDF
    TRACtion seeks to narrow community-academia gaps through an intentional, proactive effort to systematically and productively engage local nonprofits and CBOs to encourage cross-sector knowledge transmission; inspire the co-development of use-inspired research agendas; and mobilize UCLA knowledge and innovations to accelerate impact in the region. T ...
  • Political Preferences and Transport Infrastructure Evidence from Californias HighSpeed Rail
    Political Preferences and Transport Infrastructure: Evidence from California’s High-Speed Rail
    Fajgelbaum, Pablo D. ;
    Gaubert, Cecile
    2023-01-01 | PDF
    We study how political preferences shaped California’s High-Speed Rail (CHSR), a large transportation project approved by referendum in 2008. Voters’ support responded significantly to the projected economic gains in their tract of residence, as measured by a quantitative model of high-speed rail matched to CHSR plans. Given this response, a reveal ...
  • Well Control Equipment Systems Safety 2023 Annual Report
    Well Control Equipment Systems Safety: 2023 Annual Report
    United States. Department of Transportation. Bureau of Transportation Statistics
    2023-01-01 | PDF
    The Well Control Equipment Systems Safety – 2023 Annual Report, produced by the Bureau of Transportation Statistics, summarizes well control equipment (WCE) failure events that occurred during well operations in the Gulf of Mexico (GOM) Outer Continental Shelf (OCS) from 2017 to 2023. This report is based on information collected through SafeOCS, a ...
  • Examining US Transit Vehicle Passenger Loads During the COVID19 Pandemic
    Examining US Transit Vehicle Passenger Loads During the COVID-19 Pandemic
    Dai, Tianxing ;
    Taylor, Brian D.
    2023-01-01 | PDF
    Transit ridership plummeted at the onset of the COVID-19 pandemic, and what constituted passenger crowding contracted dramatically as well. We examine trends in average passenger loads and their correlates in a national sample of U.S. transit operators during the first year of the pandemic and find that passenger loads in high-transit-ridership are ...
  • Considering FareFree Transit in the Context of Research on Transit Service and Pricing A Research Synthesis
    Considering Fare-Free Transit in the Context of Research on Transit Service and Pricing: A Research Synthesis
    King, Hannah ;
    Taylor, Brian D.
    2023-01-01 | PDF
    In this report, we examine both the substantial research literature on transit pricing and use and literature on free- and reduced fare (FAR) programs. In general, we find that FAR programs can take many forms, and the idea of “fare-free” transit is far from a one-size-fits-all proposition. Second, while reducing or eliminating fares does indeed in ...
  • Development of a Multiple Water Course Joint Probability Analysis Procedure for Indiana Watersheds
    Development of a Multiple Water Course Joint Probability Analysis Procedure for Indiana Watersheds
    Ghanghas, Ankit ;
    Dey, Sayan
    2023-01-01 | PDF
    The design of hydraulic structures located near a confluence of two streams must take into consideration the flows from both of the streams. A hydraulic structure located on a small tributary that drains into a large river immediately downstream is not just affected by the flow in the tributary, but also by the backwater flow from the downstream ri ...
  • Revegetation Success and Weed Resilience of Wyoming RightofWay Reclamation Data Management Plan
    Revegetation Success and Weed Resilience of Wyoming Right-of-Way Reclamation [Data Management Plan]
    Hufford, Kristina ;
    Moine, Joellyn
    2023-01-01 | PDF
    Objectives are to evaluate different reclamation seed mixes along roadsides over twenty years to determine the rate of reseeding success and better define combinations of species and site variables that contribute to successful revegetation outcomes. Sites and seed mixes will be evaluated for resilience to invasion by high impact species such as ch ...
  • Safety Enhancements at ShortStorageSpace Railroad Crossings
    Safety Enhancements at Short-Storage-Space Railroad Crossings
    Das, Subasish ;
    Warner, Jeffery
    2023-01-01 | PDF
    A short storage space railroad crossing has insufficient distance between the crossing and the highway intersection stop line to safely store a design vehicle. The current Michigan Department of Transportation (MDOT) project (OR 19-032), led by Texas A&M Transportation Institute (TTI), aimed to provide guidance on these crossing types. This study e ...
  • Developing Customized NRCS Unit Hydrographs Finley UHs for Ungauged Watersheds in Indiana
    Developing Customized NRCS Unit Hydrographs (Finley UHs) for Ungauged Watersheds in Indiana
    Huang, Tao ;
    Merwade, Venkatesh
    2023-01-01 | PDF
    The Natural Resources Conservation Service (NRCS, formerly the Soil Conservation Service, SCS) unit hydrograph (UH) is one of the most commonly used synthetic UH methods for hydrologic modeling and engineering design all over the world. However, previous studies have shown that the application of the NRCS UH method for some ungauged watersheds in t ...
  • Modeling MultiModal Network Equilibrium with Active Transportation and Shared Mobility
    Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility
    Hou, Zenghao
    ORCID ICON IMG
    2023-01-01 | PDF
    The imbalance between increasing travel demand by passengers and the stagnant growth of transportation infrastructure capacity, particularly in urban areas, has caused dramatic impacts on traffic condition, the environment, public health, and energy consumption. Consequently, the development of sustainable and resilient transportation systems has b ...
  • Develop Improved Methods for Eliminating Striping on Roadway Surfaces Project Summary
    Develop Improved Methods for Eliminating Striping on Roadway Surfaces [Project Summary]
    Manzo, Maurizio ;
    Huang, Zhenhua
    2022-12-31 | PDF
    The project aimed to investigate current removal techniques and to put together and test a pulsed solid state fiber laser system as an alternative method for road markings removal. Firstly, a literature review and a national survey were conducted to understand the current state-of-the-art and industry standards regarding the removal of road stripes ...
  • Field Monitoring of JointLess Curved Integral Abutment Bridge in Nebraska
    Field Monitoring of Joint-Less Curved Integral Abutment Bridge in Nebraska
    Ziaei, Ramin ;
    Alhowaidi, Yusuf
    2022-12-31 | PDF
    The research objective of this project is to study the behavior of the curved full integral abutment bridge designed in Nebraska through field monitoring and numerical simulation to 1) understand and model the complex short-term and long-term behavior of curved integral abutment bridges, 2) evaluate if the details provided in Nebraska (pile embedme ...
  • 07061 Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior Brief
    0-7061: Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior [Brief]
    Nazarian, Soheil ;
    Bhasin, Amit
    2022-12-31 | PDF
    The engineering properties of asphalt mixtures change with time. Shortly after placement, asphalt concrete (AC) layers are more susceptible to rutting. As the pavement ages, the AC layer becomes stiffer, brittle, and thus more susceptible to cracking. Current protocols provide guidelines for the selection of materials, the determination of the mate ...
  • Assessing System Performance of the Michigan Trunkline Measures and Analytical Procedures for Planning and Operations
    Assessing System Performance of the Michigan Trunkline: Measures and Analytical Procedures for Planning and Operations
    Zockaie, Ali ;
    Kamjoo, Ehsan
    2022-12-31 | PDF
    The Moving Ahead for Progress in the 21st Century Act (MAP-21) required transportation agencies to use performance-based approaches, and there are federal guidelines and programs to help agencies develop performance management systems. For the performance management strategies to be effective, it is critical to establish performance measures that a ...
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