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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 6341 - 6360 of 36049 results
  • Geosynthetic Reinforced Soil Integrated Bridge System GRSIBS
    Geosynthetic Reinforced Soil: Integrated Bridge System (GRS-IBS)
    Abernathy, Craig
    2018-11-01 | PDF
    This report documents the performance of Geosynthetic Reinforced Soil (GRS) Integrated Bridge system (IBS) technology, which was used to build a bridge at the South Fork Dry Fork Marias River crossing in Montana. GRS-IBS is a system that uses alternating layers of granular fill material and geotextile sheets to create a composite reinforcement to s ...
  • Staged Concrete Bridge Deck Pours Adjacent to Live Traffic
    Staged Concrete Bridge Deck Pours Adjacent to Live Traffic
    Weatherer, Peter J ;
    Hedegaard, Brock D.
    2018-11-01 | PDF
    An evaluation of the behavior of longitudinal joints in staged-constructed bridge decks subjected to traffic-induced displacements during curing of concrete was conducted through field inspections and monitoring, numerical analyses, and laboratory tests. Field inspection of deck-on-girder bridges showed no indication of adverse effects from traffic ...
  • Cone Penetration Test Design Guide for State Geotechnical Engineers
    Cone Penetration Test Design Guide for State Geotechnical Engineers
    Dagger, Ryan ;
    Saftner, David
    2018-11-01 | PDF
    The objectives of this project are focused on a new cone penetration testing (CPT) geotechnical design manual for highway and transportation applications based on recent research and innovation covering the period from 2000 to 2018. A step-by-step procedure is outlined on how to use CPT data in the analysis and design of common geotechnical tasks. ...
  • Evaluation of the LongTerm Degradation and Strength Characteristics of Insitu Wisconsin Virgin Base Aggregates under HMA Pavements
    Evaluation of the Long-Term Degradation and Strength Characteristics of In-situ Wisconsin Virgin Base Aggregates under HMA Pavements
    Titi, Hani H. ;
    Tabatabai, Habib
    2018-11-01 | PDF
    This research investigated the performance of base layer aggregates in HMA pavements using laboratory tests on base layer materials and field tests on pavement sections. The purpose of this research was to investigate potential degradation of aggregate bases as well as to investigate strength reductions over time, and to evaluate the likely causes ...
  • Effect of Polymer Slurry Stabilization on Drilled Shaft Side Shear over Time Summary
    Effect of Polymer Slurry Stabilization on Drilled Shaft Side Shear over Time [Summary]
    Mullins, Gray
    2018-11-01 | PDF
    University of South Florida researchers tested the bearing strength of pilings placed in holes exposed to slurry for shorter and longer periods of time.
  • Revised Statewide Asphalt Binder Selection Catalog
    Revised Statewide Asphalt Binder Selection Catalog
    Karki, Pravat ;
    Zhou, Fujie
    2018-11-01 | PDF
    This product describes the revised statewide asphalt binder catalog. To accomplish this objective, researchers first identified the difference between the catalog currently used in Texas and the catalog developed under project 0-6674 and then revised the existing catalog based on the latest research findings from project 0-6674-01. To make Texas De ...
  • Potential Use of Ramp Metering as Congestion Management Strategy in the DallasFort Worth Metroplex
    Potential Use of Ramp Metering as Congestion Management Strategy in the Dallas-Fort Worth Metroplex
    Chaudhary, Nadeem A ;
    Farzaneh, Reza
    2018-11-01 | PDF
    There is an increasing interest by public officials in the use of ramp metering for congestion mitigation at various freeway locations in the Dallas-Fort Worth (DFW) metroplex. DFW is currently in nonattainment for ground-level ozone, and transportation improvements in the area are subject to transportation conformity process. This project used dyn ...
  • Implementing Rubblization and Drainage Improvement Techniques on Severely Distressed Concrete Pavements Technical Report
    Implementing Rubblization and Drainage Improvement Techniques on Severely Distressed Concrete Pavements: Technical Report
    Scullion, Tom
    2018-11-01 | PDF
    Rubblization of old concrete pavement has not been widely used in Texas. In this implementation study, a review was made of Texas experience with this approach including both successes and failures. The lessons learned were incorporated into workshop materials developed as part of this study. A review was also completed on the recommended pavement ...
  • Seismic Vulnerability and PostEvent Actions for Texas Bridge Infrastructure
    Seismic Vulnerability and Post-Event Actions for Texas Bridge Infrastructure
    Khosravikia, Farid ;
    Potter, Anderson
    2018-11-01 | PDF
    The research investigates the seismic vulnerability of bridges in Texas by characterizing seismic hazards in the State, developing computational tools to estimate the likelihood of seismic damage to various bridge types, and providing the Texas Department of Transportation (TxDOT) tools to inform post-earthquake response planning and decision-makin ...
  • Experimental Evaluation of the Engineering Behavior of SoilBiochar Mixture as a Roadway Construction Material
    Experimental Evaluation of the Engineering Behavior of Soil-Biochar Mixture as a Roadway Construction Material
    Manahiloh, Kalehiwot Nega ;
    Lamprinakos, Renee
    2018-11-01 | PDF
    Past studies have investigated the influences of biochar addition on the nutrient removal and saturated conductivity properties of soils. Literature survey showed that there is a gap in the amount of work devoted to studying the effects of biochar addition on strength and volume change properties of soils. If biochar amended soils are to be used as ...
  • Strengthening of Existing InvertedT Bent Caps Volume 2 Experimental Test Program
    Strengthening of Existing Inverted-T Bent Caps -- Volume 2: Experimental Test Program
    Hurlebaus, Stefan ;
    Mander, John B.
    2018-11-01 | PDF
    Inverted-T bent caps have been widely used in Texas to provide increased clearance underneath bridges while providing an aesthetically pleasing substructure alternative. The bottom flange (ledge) must have sufficient transverse and punching shear capacity to be able to transfer the applied loads to the web. In this study, retrofit solutions to stre ...
  • Reference Guide for Tack Coats Spray Paver Membranes and Underseals
    Reference Guide for Tack Coats, Spray Paver Membranes, and Underseals
    Wilson, Bryan
    2018-11-01 | PDF
    The bond quality between pavement layers significantly impacts pavement life. Poor overlay bonding may lead to delamination, slippage cracking, and premature fatigue cracking, reflection cracking, and rutting. There are several options to prepare the surface prior to an asphalt overlay. Choosing the right treatment depends on the existing surface c ...
  • Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops November 2018
    Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops [November 2018]
    Martin, Dennis ;
    Underwood, James R.
    2018-11-01 | PDF
    Initial pesticide applicator training schools, certification testing, sprayer calibration workshops and on-going yearly continuing education sessions comprise the herbicide applicator training program of the Oklahoma Department of Transportation (ODOT). Six pesticide applicator certification schools were conducted by Oklahoma State University (OSU) ...
  • Alternative Noise Barrier Approvals
    Alternative Noise Barrier Approvals
    El-Rayes, Khaled ;
    Liu, Liang Y.
    2018-11-01 | PDF
    Current Illinois Department of Transportation (IDOT) policies specify that noise barriers can be constructed of earth, masonry, concrete, and composite materials. These IDOT policies specify that alternative noise barriers with specialty items and materials must meet a number of criteria such as minimum transmission loss, noise reduction coefficien ...
  • Pavement Marking Comparison Study US Route 302 Bike Lane Markings
    Pavement Marking Comparison Study – US Route 302 Bike Lane Markings
    Anderson, Ian
    2018-11-01 | PDF
    Numerous types of bike lane marking were used in a test section of US-302 in Berlin VT as part of a road diet configuration. The bike lane pavement marking test was done as part of a larger experimental feature study on durable pavement marking tapes, in which set of pavement markings from various vendors was used along the course of the reconstruc ...
  • Performance Specification for Geogrid Reinforced Aggregate Base
    Performance Specification for Geogrid Reinforced Aggregate Base
    Siekmeier, John
    2018-11-01 | PDF
    A performance specification has been developed for geogrid reinforced aggregate base, which utilizes the dynamic cone penetrometer (DCP) and light weight deflectometer (LWD) to test the aggregate base reinforced with geogrid. These quality assurance devices, in particular the DCP, are very familiar to construction inspection staff in Minnesota, and ...
  • Improving the Durability of the Inverted TBeam Bridge System
    Improving the Durability of the Inverted T-Beam Bridge System
    Roberts-Wollmann, Carin L. ;
    Pulumati, Vijaykanth
    2018-11-01 | PDF
    The inverted T‐beam system provides an accelerated bridge construction alternative. The system consists of adjacent precast inverted T‐beams finished with a cast‐in‐place concrete topping. The system offers enhanced performance against reflective cracking and reduces the likelihood of cracking due to time dependent effects. Differential shrinkage i ...
  • Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers
    Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers
    Im, Soohyok ;
    Sebesta, Stephen
    2018-11-01 | PDF
    Moisture damage to old hot mix asphalt layers can result in surface cracking and greatly reduce the life of any new asphalt overlay. Buried moisture damage, generally called stripping, in asphalt layers can often go undetected, resulting in new overlays not reaching their design life. Conventional wisdom is to mill down to solid HMA and then place ...
  • Testing and Evaluation of Freeway Wrongway Driving Detection Systems
    Testing and Evaluation of Freeway Wrong-way Driving Detection Systems
    Lin, Pei-Sung ;
    Chen, Cong
    2018-11-01 | PDF
    Although wrong-way driving (WWD) crashes account for a relatively small portion of total crashes, the impact between two cars crashing into each other at high speeds in opposite directions causes a tremendous amount of damage compared to any other types of crashes, especially on freeways or other limited access facilities. Therefore, there is a con ...
  • Fatigue Resistance and Reliability of High Mast Illumination Poles HMIPs with PreExisting Cracks Final Report
    Fatigue Resistance and Reliability of High Mast Illumination Poles (HMIPs) with Pre-Existing Cracks: Final Report
    Morovat, Mohammed A ;
    Chen, Ying-Chuan
    2018-11-01 | PDF
    High mast illumination poles (HMIPs) are used throughout Texas and the U.S. to provide lighting along highways and at interchanges. Texas currently has about 5000 HMIPs, varying in height from 100 to 175 ft. Failures of HMIPs have been reported in several states, attributed to failures at the shaft-to-base plate connection. No collapses of HMIPs ha ...
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