In partnership with Arconic and Embraer, the Federal Aviation Administration (FAA) is assessing emerging metallic structures technologies (EMST) using the FAA’s Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility. In this collaborative effort, full-scale fuselage panel test data will be obtained to assess the effect of EMS
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Many older bridges were designed for much lighter loads than are required today, and engineering calculations based on current codes show that these bridges are at risk for posting, closure or replacement. However, many of these structures show few or no signs of distress and provide adequate service. This raises the obvious question: even if a bri
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What changes to policies and procedures at the California Department of Transportation (Caltrans) would increase transfers of agency-owned excess land to California Native American Tribes and groups negatively impacted by freeway development? Using case studies on LandBack and reparations and qualitative research with Caltrans staff and community a
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In partnership with Arconic and Embraer, the Federal Aviation Administration (FAA) is assessing emerging metallic structures technologies (EMST) using the FAA’s Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility. In this collaborative effort, full-scale fuselage panel test data will be obtained to assess the effect of EMS
...
In partnership with Arconic and Embraer, the Federal Aviation Administration (FAA) is assessing emerging metallic structures technologies (EMST) using the FAA’s Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility. In this collaborative effort, full-scale fuselage panel test data will be obtained to assess the effect of EMS
...
In partnership with Arconic and Embraer, the Federal Aviation Administration (FAA) is assessing emerging metallic structures technologies (EMST) using the FAA’s Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility. In this collaborative effort, full-scale fuselage panel test data will be obtained to assess the effect of EMS
...
In partnership with Arconic and Embraer, the Federal Aviation Administration (FAA) is assessing emerging metallic structures technologies (EMST) using the FAA’s Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility. In this collaborative effort, full-scale fuselage panel test data will be obtained to assess the effect of EMS
...
Large language models (often also termed foundation models) are revolutionizing multiple aspects of every-day life and work, with the use of artificial intelligence (AI) agents like ChatGPT being now commonplace and transforming life, work, and scientific discovery as we know it. In this project, we harness the power of such foundation models in or
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The sliding friction resistance between rail crossties and ballast material was examined. Testing focusing on the equivalent (or average) coefficient of friction spread over the crosstie contact area was performed for high density polyethylene (HDPE) smooth and dimpled crossties as well as for dry and wet wood crossties. Ballast rock included commo
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It is well known that one of the most significant causes of train derailments within the U.S. is due to rail fracture [FRA 2023]. Despite this fact, a reliable model for predicting fatigue fracture in rails has not yet been deployed within the U.S. We have recently been developing a multiscale computational algorithm for predicting crack evolution
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It is well-known that track buckling is one of the most commonplace causes of train derailments. Accordingly, with funding provided by the USDOT UTC program and the Technology Transportation Center, Inc., we have now completed developing a Beta-version track buckling model for deployment by U.S. Railroad Companies as a tool for predicting track buc
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The State Highway 9 (SH 9) Colorado River South Wildlife and Safety Improvement Project in Grand County was designed by the Colorado Department of Transportation (CDOT) and partners to improve motorist safety by reducing wildlife-vehicle collisions (WVC) while providing opportunities for wildlife to move beneath and above SH 9 through wildlife cros
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The purpose of this report is to summarize the research activities that were performed during the first year of this research project. In conducting this research, the research team split into several independent groups, each focusing on different aspects of the problem. One group has been focused on using weather and traffic flow conditions as pre
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The Texas Department of Transportation (TxDOT) owns and maintains an active fleet inventory of over 17,100 units, replacing about ten percent of the fleet annually. Any methodology that can improve the replacement procedures currently used at TxDOT has the potential of savings millions of dollars. This report describes a replacement methodology dev
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The Texas Department of Transportation (TxDOT) owns and maintains an active fleet inventory of approximately 17,000 units, replacing about ten percent of them annually. Private and public agencies do not routinely use life-cycle cost as replacement criteria because, until now, the only way to automate the inspection of thousands of life-cycle cost
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The primary function of equipment managers is to provide the proper equipment, at the right time and at the lowest overall cost. A major task in accomplishing function is fleet planning, which involves identifying the requirements of equipment users, developing optimal strategies to meet those needs, and putting the plan into action. Economic equip
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This test method assures the compatibility of Texas Department of Transportation (TxDOT) fleet vehicles and VHF FM radio equipment operating in the frequency ranges of 30 to 50 MHz and 150 to 174 MHz. It is intended to identify 90% or more of radio-frequency interference (RFI) ingress and egress problems.
We examined CDOT design procedures, blasting methods, blast calculations, and aesthetic considerations to specify best management practices for highway rock cut operations for the Colorado Department of Transportation (CDOT) that could be followed when a Contractor or Permittee is proposing to blast. Though aesthetics are highly subjective, we deve
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The objective of this research is to develop a set of design and operational recommendations to reduce the number of rollover, jackknife, and rollback end positions for trucks entering the emergency ramp. To do so, the research team used several strategies including a review of literature, appraisal of incident reports, conduct field observations a
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The objective of this project was to assess the efficacy of post-fire ground treatment in mitigating erosion and runoff on soil slopes subjected to wildfires. This objective was achieved through physical slope-model experiments and discrete element method (DEM) modeling. The physical experiments were conducted on block soil samples collected from U
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United States Department of Transportation
Ullmann, Leila
