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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 3501 - 3520 of 36151 results
  • The Effectiveness of Soil Decompaction for Stormwater Management
    The Effectiveness of Soil Decompaction for Stormwater Management
    Schwartz, Stuart S
    ORCID ICON IMG
    2021-07-01 | PDF
    Compacted and highly disturbed urban soils are a pervasive feature of modern constructed landscapes. This research advances the integration of cost-effective practices that improve soil structure, restore infiltration, and reduce stormwater runoff to support soil decompaction and amendment as an approved stormwater best management practice (BMP) in ...
  • Illinois Experience Using Quality Control for Performance and Pay for Performance To Determine Pay for HotMix Asphalt
    Illinois’ Experience Using Quality Control for Performance and Pay for Performance To Determine Pay for Hot-Mix Asphalt
    Al-Qadi, Imad L ;
    Rivera-Perez, José
    2021-07-01 | PDF
    The study addressed practical concerns and questions regarding QCP and PFP specifications, which reveal the following key outcomes: Contractors have more experience working with QCP projects. Training of contractors on PWL computations used in the PFP specification is warranted. Although pay incentives (PF>100%) are only possible in the PFP specifi ...
  • Determination of Equivalent Single Axle Load ESAL Factor for Georgia Pavement Design
    Determination of Equivalent Single Axle Load (ESAL) Factor for Georgia Pavement Design
    Kim, S. Sonny ;
    Yang, Jidong J
    2021-07-01 | PDF
    The Georgia Department of Transportation (GDOT) is currently using the 1972 AASHTO Pavement Design Guide in which the damage caused by traveling vehicles in the pavement’s design life is defined in terms of equivalent single axle load (ESAL). The last updates of truck ESAL factors in Georgia were made in 1984. Thus, there is a need to update ESAL f ...
  • Road Ditch Line Mapping with Mobile LiDAR
    Road Ditch Line Mapping with Mobile LiDAR
    Habib, Ayman ;
    Bullock, Darcy M.
    2021-07-01 | PDF
    Maintenance of roadside ditches is important to avoid localized flooding and premature failure of pavements. Scheduling effective preventative maintenance requires mapping of the ditch profile to identify areas requiring excavation of long-term sediment accumulation. High-resolution, high-quality point clouds collected by mobile LiDAR mapping syste ...
  • Tensions and TradeOffs in Planning and Policymaking for TransitOriented Development Transit and Active Transport in California Cities
    Tensions and Trade-Offs in Planning and Policymaking for Transit-Oriented Development, Transit, and Active Transport in California Cities
    Barbour, Elisa ;
    Jin, Janet
    2021-07-01 | PDF
    This report provides research findings from the second year of a two-year research project on patterns of local policymaking in California to support transit-oriented development (TOD), transit, and active transport. Through survey research and case studies, the project assessed motivations, perceived obstacles, and priorities for development near ...
  • Statistical Analysis of 2018 HMA Production and Construction Data to Improve Quality Assurance and Acceptance Practices in Idaho
    Statistical Analysis of 2018 HMA Production and Construction Data to Improve Quality Assurance and Acceptance Practices in Idaho
    Sadegh, Mojtaba ;
    Mishra, Deb
    2021-07-01 | PDF
    Quality assurance procedure is adopted to ensure hot mix asphalts meet design performance. Robustness of QA reports, however, were challenged during 2017 and 2018 data reviews conducted on projects constructed over several previous years by the Idaho Transportation Department (ITD) and the Federal Highway Administration (FHWA). To further investiga ...
  • Sunshine Skyway Bridge Monitoring Phase II System Development
    Sunshine Skyway Bridge Monitoring Phase II: System Development
    Bridge, Jennifer ;
    Davis, Justin R.
    2021-07-01 | PDF
    The District 7 Structures Maintenance Office sought to take the existing monitoring components on the Sunshine Skyway Bridge and create a centralized monitoring system available via a web interface and capable of providing alerts for anomalous bridge response data. This project included the selection of a web development contractor, the design of a ...
  • Integrated Corridor Management ICM Concept Exploration for Suffolk County Department of Public Works SCDPW and New York State Department of Transportation NYSDOT Region 10
    Integrated Corridor Management (ICM) Concept Exploration for Suffolk County Department of Public Works (SCDPW) and New York State Department of Transportation (NYSDOT) Region 10
    Muthuswamy, Satya ;
    Brueckner, Paul
    2021-07-01 | PDF
    The focus of this project was to explore the possibility of ICM in Suffolk County, NY. ICM is considered one of the key strategies of Transportation Systems Management and Operation (TSMO), which involves multimodal and multijurisdictional efforts in managing congestion caused by incidents along major commute corridors. As part of this research eff ...
  • Final Analysis of Lightweight Transparent Noise Barriers on I30 Elevated Structures in Dallas Texas
    Final Analysis of Lightweight Transparent Noise Barriers on I-30 Elevated Structures in Dallas, Texas
    Trevino, Manuel
    2021-07-01 | PDF
    The Texas Department of Transportation commissioned a study to analyze the feasibility and effectiveness of lightweight noise barriers on Interstate Highway 30, near downtown Dallas. The highway segment in question, an elevated structure next to a creek, had presented noise problems for the adjacent neighborhood ever since its expansion in the earl ...
  • Performance Benefits of FiberReinforced Thin Concrete Pavement and Overlays
    Performance Benefits of Fiber-Reinforced Thin Concrete Pavement and Overlays
    Barman, Manik ;
    Roy, Souvik
    2021-07-01 | PDF
    This study investigates the performance benefits of synthetic structural fibers in mitigating distresses in thin concrete pavements and overlays. In this study, two ultra-thin (3 and 4 inches thick) and four thin (5 and 6 inches thick) concrete pavements placed on a gravel base along with two thin unbonded concrete overlay cells (5 inches thick) pl ...
  • Domestic Airline Fares Consumer Report First Quarter 2021 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2021 Passenger and Fare Information
    United States. Department of Transportation
    2021-07-01 | 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 ...
  • Toward a Florida Automated Connected Electric and Shared ACESTransportation System Roadmap Phase I
    Toward a Florida Automated, Connected, Electric, and Shared (ACES)Transportation System Roadmap: Phase I
    Lin, Pei-Sung ;
    Menon, Nikhil
    2021-07-01 | PDF
    Automated, Connected, Electric, and Shared (ACES) technologies are rapidly evolving and will continue to impact development of vehicles, infrastructure, communities, commerce, and the economy. With rapidly evolving technology, it is difficult yet critical to maintain coordination and increase collaboration among research, development, testing, depl ...
  • MDOT Culvert Inspection
    MDOT Culvert Inspection
    Alexander, James ;
    Robey, Darren
    2021-07-01 | PDF
    Concrete/corrugated metal culverts (straight, 50-150 ft long, 12" -48" diameter) are currently inspected visually and less frequently with ground robots by MDOT SHA. The condition of most culverts is unclear due to inspection limitations, which impacts maintenance prioritization. An improved inspection process would allow for a more proactive appro ...
  • SelfCentering Bridge Bent for Accelerated Bridge Construction
    Self-Centering Bridge Bent for Accelerated Bridge Construction
    Pantelides, C. P. ;
    Thapa, Dipendra
    2021-07-01 | PDF
    Precast concrete construction has been proven to be very efficient in bridge engineering, especially in accelerated bridge construction (ABC), where precast concrete components are connected to save time and minimize disruption of traffic. Post-tensioned (PT) concrete structural elements when combined with energy dissipators (ED) create a hybrid sy ...
  • Modernization of Iowa Transportation Program Management System
    Modernization of Iowa Transportation Program Management System
    Waid, Danny R. ;
    Moore, Brian P
    2021-07-01 | PDF
    The TR-726 research project investigates and produces the modernization of the Iowa Transportation Program Management System, TPMS. This report describes TPMS background information, application development processes, and User Manual and Developmental Specifications used to create the web-based application modernization and incorporated improvement ...
  • Spectrum for Connected Vehicles
    Spectrum for Connected Vehicles
    Peha, Jon M ;
    Ligo, Alexandre K
    2021-07-01 | PDF
    Connected vehicles, which are likely to be an important component of smart cities, require spectrum. As of December 2019, the US Federal Communications Commission and the US Department of Transportation were pursuing opposing visions of a spectrum policy for connected vehicles. Through extensive simulation, this project will provide both agencies w ...
  • Literature Review on Use of Nanoparticle Technology for Reducing Emissions
    Literature Review on Use of Nanoparticle Technology for Reducing Emissions
    Loftus-Otway, Lisa
    ORCID ICON IMG
    2021-07-01 | PDF
    Nanoscale science, engineering, chemistry and technology—nanotechnology science—is expected to deliver societal and economic benefits in multiple fields. Transportation is expected to be one of the sectors that will see impacts from improved material life through to environmental benefits. This report provides a high-level overview and introduction ...
  • Taxiforall Incentivized Taxi Actuation System for Balanced Areawide Service
    Taxi-for-all: Incentivized Taxi Actuation System for Balanced Area-wide Service
    Joe-Wong, Carlee ;
    Noh, Haeyoung
    2021-07-01 | PDF
    This project develops a method to incentivize taxis to travel to different parts of a city so that they sense data or pick up passengers in under-served areas. Taxis' natural movement generally leads to them concentrating in busy locations with many potential passengers. By incentivizing taxis to move towards less busy locations, one can even out t ...
  • Bicycle Volume Counting Machine Validation Correction Estimating Forecasting and Analysis of Injury Risk
    Bicycle Volume: Counting Machine Validation & Correction, Estimating & Forecasting, and Analysis of Injury Risk
    Fan, Wei (David) ;
    Lin, Zijing
    2021-07-01 | PDF
    Cycling is an environmentally friendly mode of transportation that can potentially mitigate traffic congestion and improve air pollution. City planners and decision-makers have begun to incorporate the needs of cyclists when building infrastructures. However, factors like annual average daily bicycle volume (AADB) and cycling injury risk should be ...
  • SpatioTemporal Analysis of the Roadside Transportation Related Air Quality STARTRAQ and Neighborhood Characterization
    Spatio-Temporal Analysis of the Roadside Transportation Related Air Quality (STARTRAQ) and Neighborhood Characterization
    Kwon, Jaymin ;
    Ahn, Yushin
    2021-07-01 | PDF
    To promote active transportation modes (such as bike ride and walking), and to create safer communities for easier access to transit, it is essential to provide consolidated data-driven transportation information to the public. The relevant and timely information from data facilitates the improvement of decision-making processes for the establishme ...
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