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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 5581 - 5600 of 36022 results
  • Evaluation of Recycled Base Aggregates
    Evaluation of Recycled Base Aggregates
    Titi, Hani H. ;
    Tabatabai, Habib
    2019-07-01 | PDF
    This study intended to provide quantitative evaluation of the use of RAP and RCA as base layers in HMA pavements. The study used field and laboratory testing programs and data from WisDOT PIF database quantify the performance of base materials and test sections on pavements with CA, RCA, and RAP base layers. Analysis of the particle size distributi ...
  • Rapid Retrofit and Strengthening of Bridge Components
    Rapid Retrofit and Strengthening of Bridge Components
    Peiris, Abheetha ;
    Harik, Issam E.
    2019-07-01 | PDF
    Rapid repair of damaged or deteriorated concrete bridge components will prevent the entire bridge from suffering irreversible damage in the future due to gradual spalling of concrete or corrosion of exposed steel. CFRP laminates and fabrics have become popular for repairing and strengthening of concrete girders. A series of CFRP materials — branded ...
  • Edge Drain Performance
    Edge Drain Performance
    Ashurst, Kean H.
    2019-07-01 | PDF
    Edge drain systems are used on new highway construction projects and rehabilitation projects to reduce the moisture content of the pavement block and subgrade. Maintaining dry conditions in and around these components increases the subgrade strength and extends a pavement’s surface life. Edge drain systems can only operate effectively, however, if ...
  • Evaluation of Asphalt Mixtures Containing Recycled Asphalt Shingles Tech Summary
    Evaluation of Asphalt Mixtures Containing Recycled Asphalt Shingles [Tech Summary]
    Mohammad, Louay ;
    Cooper, Samuel B. III
    2019-07-01 | PDF
    Asphalt binder prices are at an all-time high with no relief in sight. With the asphalt mixtures prices continuously climbing, highway agencies and owners are continually searching for methods to decrease material costs and maximize their benefits without compromising performance. One such method is to develop innovative technologies to incorporate ...
  • ITS Support for Pedestrians and Bicyclists Count Developing a Statewide Multimodal Count Program
    ITS Support for Pedestrians and Bicyclists Count: Developing a Statewide Multimodal Count Program
    Codjoe, Julius ;
    Holamoge, Yoshita
    2019-07-01 | PDF
    It is critical to understand the travel behavior of pedestrians and cyclists on Louisiana’s roadways. Not only do pedestrian and cyclist counts assist in research for safety, but these statistics are also essential for planners and policymakers when evaluating the usage of roadways and dictating infrastructure spending. Better understanding of over ...
  • ITS Support for Pedestrians and Bicyclists Count Developing a Statewide Multimodal Count Program Tech Summary
    ITS Support for Pedestrians and Bicyclists Count: Developing a Statewide Multimodal Count Program [Tech Summary]
    Codjoe, Julius ;
    Zeringue, Kirk M.
    2019-07-01 | PDF
    Understanding the travel behavior of pedestrians and cyclists on Louisiana’s roadways is critical to evaluating safety outcomes relative to rates of exposure; identifying appropriate, context-sensitive complete streets infrastructure interventions; and understanding overall statewide and location specific transportation trends. Better understanding ...
  • Development and Regionalization of In Situ Bioslopes and Bioswales
    Development and Regionalization of In Situ Bioslopes and Bioswales
    Johnson, Kurt W. ;
    Cai, Meijun
    2019-07-01 | PDF
    This project is a multi-disciplinary investigation into the use of alternative media for biofiltration systems in Minnesota. Over the last thirty years, the Minnesota Department of Transportation (MnDOT) has implemented biofilters along roadways as a stormwater control measure. These systems must be able to infiltrate and treat the first inch of ra ...
  • Safety Analysis for SHIFT Implementation
    Safety Analysis for SHIFT Implementation
    Souleyrette, Reginald ;
    Tanzen, Riana
    2019-07-01 | PDF
    The Strategic Highway Investment Formula for Tomorrow (SHIFT) program research team evaluated the program’s 2018 safety component and developed a new methodology to rank the safety needs of 2020 projects. For the current year, the research team suggests replacing the SHIFT 2018 formulas (based on three naive crash measures) with a new metric, Exces ...
  • Communications and RadarSupported Transportation Operations and Planning Phase 2 Final Report
    Communications and Radar-Supported Transportation Operations and Planning – Phase 2: Final Report
    Motro, Michael ;
    Kim, Taewan
    2019-07-01 | PDF
    This project designs a conceptual framework to harness and mature wireless technology to improve transportation safety, with a focus on frontal collision warning/collision avoidance (CW/CA) systems. The framework identifies components of the technology and its capabilities, and how these components can be integrated to improve transportation safety ...
  • Chemical Characterization of Asphalts Related to Their Performance Tech Summary
    Chemical Characterization of Asphalts Related to Their Performance [Tech Summary]
    Daly, William ;
    Cooper III, Samuel
    2019-07-01 | PDF
    Using recycled asphalt pavements (RAP) and recycled asphalt shingles (RAS) blended with virgin binder for new road pavements is an environmentally friendly way to recycle the used asphalt. In this project, researchers studied a correlation between the molecular structure of asphalt binders of conventional hot mix asphalt mixtures (HMA) containing r ...
  • IronEnhanced Swale Ditch Checks for Phosphorus Retention
    Iron-Enhanced Swale Ditch Checks for Phosphorus Retention
    Natarajan, Poornima ;
    Gulliver, John S.
    2019-07-01 | PDF
    Iron-enhanced ditch checks in roadside swales were developed specifically for capturing dissolved phosphorus and dissolved metals from roadway runoff in both urban and agricultural environments. One iron-enhanced ditch check constructed along CR 15 (formerly TH 5) in Stillwater, Minnesota, was monitored during 40 storm events from 2016 to 2018. The ...
  • Test Procedure for Validation of Automated Distress Data Technical Report
    Test Procedure for Validation of Automated Distress Data: Technical Report
    Wimsatt, Andrew ;
    Fernando, Emmanuel
    2019-07-01 | PDF
    This project developed a performance-based specification for automated distress data collections systems based on analysis of data provided by the Texas Department of Transportation (TxDOT), analysis of data collected under this research study, and discussions with three experienced providers of distress data collection. The research team also assi ...
  • Traveler Information Application for Route 1 and Route 18 Corridors
    Traveler Information Application for Route 1 and Route 18 Corridors
    Lawson, Catherine T.
    2019-07-01 | PDF
    The final product of this research is an enhanced Mobile Application platform that receives travel time information, parking information and transit/shuttle schedule information in real time for the Routes 1 (from I-295 to Garden State Parkway) and 18 (from New Jersey Turnpike to Rutgers University – Piscataway, NJ) corridors, specific to certain d ...
  • Truss Bridge Rehabilitation Prioritization
    Truss Bridge Rehabilitation Prioritization
    Peiris, Abheetha ;
    Harik, Issam E.
    2019-07-01 | PDF
    Kentucky’s inventory of historic steel truss bridges is declining rapidly. There are more than 150 historic truss bridges in the Kentucky Transportation Cabinet’s (KYTC) bridge inventory. Most of these bridges require maintenance to avoid replacement. However, prioritizing the rehabilitation of these bridges based on their historic importance is ch ...
  • SHSPHSP Crosswalk A Tabular Comparative Presentation of Louisianas Strategic Highway Safety Plan SHSP and Highway Safety Plan HSP
    SHSP-HSP Crosswalk: A Tabular Comparative Presentation of Louisiana’s Strategic Highway Safety Plan (SHSP) and Highway Safety Plan (HSP)
    Capone, Rudynah
    2019-07-01 | PDF
    This technical report examined the Strategic Highway Safety Plan (SHSP) and Highway Safety Plan (HSP) documents of Louisiana to conduct a crosswalk analysis and determine where highway safety strategies in both plans overlap, co-exist, duplicate, or intersect. Targets, approaches, and strategies between the two planning documents were comparatively ...
  • Interaction Analysis of Longspan Bridges and Traffic System Subjected to Earthquakes
    Interaction Analysis of Long-span Bridges and Traffic System Subjected to Earthquakes
    Chen, Suren ;
    Zhou, Yufen
    2019-07-01 | PDF
    Long-span bridges support a large amount of traffic every day. Even when an earthquake strikes, a long-span bridge often still has many vehicles present due to the low predictability of earthquake events. To study the seismic performance of bridge and traffic systems, a new full-response prediction methodology for the coupled bridge-traffic interac ...
  • Prestress Loss Due to Creep in Precast Concrete Decked BulbTee Girders in Cold Climates
    Prestress Loss Due to Creep in Precast Concrete Decked Bulb-Tee Girders in Cold Climates
    Vandermeer, Drew ;
    Ahn, Il-Sang
    2019-07-01 | PDF
    Accurate estimation of pre-stress losses is one of the important issues for the design of precast, pre-stressed concrete bridge girders. While this subject has been long studied by many researchers, studies on pre-stress losses in cold climates are minimal. In the present research, long-term pre-stress loss due to concrete creep was studied based o ...
  • Field Demonstration of Tendon Imaging Methods
    Field Demonstration of Tendon Imaging Methods
    Dukeman, David ;
    Freij, Hani
    2019-07-01 | PDF
    Inadequate grouting is associated with corrosion of post-tensioning steel in grouted tendons used in construction applications. A nondestructive method capable of revealing grout deficiencies of external tendons was developed under concurrent Florida Department of Transportation (FDOT) Project BDV25-977-24. The method uses impedance and magnetic me ...
  • Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles Phase 2 Summary
    Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles, Phase 2 [Summary]
    Chung, Jae
    2019-07-01 | PDF
    University of Florida researchers investigated the effects of installation and removal of sheet pile walls on piles driven into granular soils.
  • Evaluation of Sustained Enforcement Education and Engineering Measures on Pedestrian Crossings
    Evaluation of Sustained Enforcement, Education, and Engineering Measures on Pedestrian Crossings
    Morris, Nichole L. ;
    Craig, Curtis M.
    2019-07-01 | PDF
    Pedestrian fatalities and injuries represent a growing percentage of all traffic fatalities and injuries. This project used a multifaceted approach to improving compliance to the Minnesota crosswalk law in Saint Paul, Minnesota, including: (1) education, (2) measurement, (3) enforcement efforts, (4) social norming, and (5) engineering treatment. Th ...
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