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Showing 1 - 20 of 221 results

Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat

Hellstrom, Ian T

;

Moorcroft, David M

2025-12-01 | PDF

While the U.S. rotorcraft accident rate over the past 10 years has steadily decreased, the number of fatal rotorcraft accidents and fatalities remains virtually unchanged. Survival in many impact scenarios is directly related to the certification level of the rotorcraft. Seats installed in newly designed rotorcraft must meet the emergency landing d ...

01/05/2026

Title : Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat Creator(s) : Hellstrom, Ian T;Moorcroft, David M;Carroll, William H; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Civil Aerospace Medical Institute Corporate Contributor(s) : United States. Federal Aviation Administration. Aircraft Certification Service Published Date : 2025-12-01 Report Number : DOT/FAA/AM-25/19 DOI : https://doi.org/10.21949/1529692 Hellstrom, Ian T et al. (2025). Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat. https://doi.org/10.21949/1529692 Hellstrom, Ian T and Moorcroft, David M and Carroll, William H "Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat" (2025), https://doi.org/10.21949/1529692 Hellstrom, Ian T et al. "Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat" , 2025, https://doi.org/10.21949/1529692 Export RIS Citation Information. TY - Tech Report AU - Hellstrom, Ian T AU - Moorcroft, David M AU - Carroll, William H A2 - United States. Department of Transportation. Federal Aviation Administration. Civil Aerospace Medical Institute A3 - United States. Federal Aviation Administration. Aircraft Certification Service AB - While the U.S. rotorcraft accident rate over the past 10 years has steadily decreased, the number of fatal rotorcraft accidents and fatalities remains virtually unchanged. Survival in many impact scenarios is directly related to the certification level of the rotorcraft. Seats installed in newly designed rotorcraft must meet the emergency landing dynamic conditions rule (14 CFR Part 27.562 and §29.562). Rotorcraft with existing type certificates, whether newly manufactured or not, do not need to meet the dynamic rule. Many legacy rotorcraft have limited space beneath the existing seats, this precludes the use of a retrofitted fully compliant stroking seat. However, these rotorcraft could still benefit from meeting the framework of the rule with a reduced velocity requirement. The FAA Civil Aerospace Medical Institute conducted research on the relationship between impact pulse, seat stroke, and occupant injury risk. 48 tests were run using a rigid Reusable Energy Attenuating Laboratory (REAL) Seat, designed by the Navy, that allowed for varying seat stroke between tests. Results showed a strong correlation between seat stroke distance and lumbar load (R²>0.97), as well as pelvis acceleration and lumbar load. Comparing the data from this test series to 88 tests from the CAMI database showed that the relationship between pelvic acceleration and lumbar load is dependent on the sled acceleration. These findings may support updates to advisory circulars and guide future rulemaking to enhance rotorcraft crashworthiness. AN - dot:88350 DO - https://doi.org/10.21949/1529692 KW - Aviation KW - Occupant protection devices KW - Rotary wing aircraft KW - Certification KW - Testing KW - Pelvis KW - Spinal column KW - Photometry KW - Seats KW - Acceleration (Mechanics) KW - Anthropomorphic Test Device (ATD) KW - Pelvis Acceleration KW - Lumbar-Spine Load KW - Seat-Pan Acceleration LA - English PB - United States. Department of Transportation. Federal Aviation Administration PY - 2025-12-01 SN - DOT/FAA/AM-25/19 TI - Occupant Response to Varying Seat Stroke Using a Reusable Energy Attenuating Aircraft Seat M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88350 ER -
Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]

Abdallah, Imad ;

Montoya, Miguel A.

2024-08-01 | XLSX

The raw data includes one excel file (418 KB) covering measurements including time, temperature, frequency, phase angle, complex modulus, elastic modulus, viscous modulus, complex viscosity, shear stress, and strain.

01/05/2026

Supporting Files

Title : Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset] Creator(s) : Abdallah, Imad;Montoya, Miguel A.;Mohajeri, Zahra; Corporate Creator(s) : University of Texas at El Paso. Center for Transportation Infrastructure Systems Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-08-01 URL : https://rosap.ntl.bts.gov/view/dot/88342 Abdallah, Imad et al. (2024). Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]. Abdallah, Imad and Montoya, Miguel A. and Mohajeri, Zahra "Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]" (2024) Abdallah, Imad et al. "Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]" , 2024 Export RIS Citation Information. TY - Dataset AU - Abdallah, Imad AU - Montoya, Miguel A. AU - Mohajeri, Zahra A2 - University of Texas at El Paso. Center for Transportation Infrastructure Systems A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The raw data includes one excel file (418 KB) covering measurements including time, temperature, frequency, phase angle, complex modulus, elastic modulus, viscous modulus, complex viscosity, shear stress, and strain. AN - dot:88342 KW - Aging (Materials) KW - Bituminous binders KW - Cracking of asphalt concrete pavements KW - Hot mix asphalt KW - Mechanical properties KW - Rheological properties KW - Data files LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2024-08-01 TI - Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset] M3 - Dataset N1 - United States N1 - 69A3552348306 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88342 ER -
National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset]

United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization ...

1995-01-01 | National Transportation Atlas Database (NTAD) | ZIP

The Water Body Polygons 1995 dataset is from the Federal Highway Administration (FHWA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). 1:100,000 Major water bodies within the United States and selected territories. Hydrographical features repre ...

01/05/2026

Supporting Files

Title : National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset] Corporate Creator(s) : United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization;United States. Department of Transportation. Federal Highway Administration; Published Date : 1995-01-01 Series : National Transportation Atlas Database (NTAD) DOI : https://doi.org/10.21949/1404311 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization (1995). National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset]. https://doi.org/10.21949/1404311 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset]" (1995), https://doi.org/10.21949/1404311 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset]" , 1995, https://doi.org/10.21949/1404311 Export RIS Citation Information. TY - Dataset A2 - United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization A2 - United States. Department of Transportation. Federal Highway Administration AB - The Water Body Polygons 1995 dataset is from the Federal Highway Administration (FHWA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). 1:100,000 Major water bodies within the United States and selected territories. Hydrographical features represented in the database include major rivers, lakes, islands, bays, sounds, and a 3-mi offshore limit for coastal states. Navigable channels in rivers and lakes are identified, as well as the Gulf and Atlantic Intracoastal Waterways. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2025-12-30. If, in the future, you have trouble accessing this dataset, please email NTLDataCurator@dot.gov describing your problem. NTL staff will do its best to assist you at that time. AN - dot:88315 DO - https://doi.org/10.21949/1404311 KW - Data collection KW - Data files KW - Water areas KW - Hydrology KW - Waterways LA - English PB - United States. Department of Transportation. Bureau of Transportation Statistics PY - 1995-01-01 T2 - National Transportation Atlas Database (NTAD) TI - National Transportation Atlas Database (NTAD): Water Body Polygons 1995 [dataset] M3 - Dataset N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88315 ER -
National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset]

United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization ...

2017-01-01 | National Transportation Atlas Database (NTAD) | ZIP

The Truck Stop Parking 2017-Present dataset is from the Federal Highway Administration (FHWA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). The truck parking data was collected as part of the Jason's Law Truck Parking Survey requirement of MA ...

01/05/2026

Supporting Files

Title : National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset] Corporate Creator(s) : United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization;United States. Department of Transportation. Federal Highway Administration; Published Date : 2017-01-01 Series : National Transportation Atlas Database (NTAD) DOI : https://doi.org/10.21949/1404309 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization (2017). National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset]. https://doi.org/10.21949/1404309 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset]" (2017), https://doi.org/10.21949/1404309 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset]" , 2017, https://doi.org/10.21949/1404309 Export RIS Citation Information. TY - Dataset A2 - United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization A2 - United States. Department of Transportation. Federal Highway Administration AB - The Truck Stop Parking 2017-Present dataset is from the Federal Highway Administration (FHWA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). The truck parking data was collected as part of the Jason's Law Truck Parking Survey requirement of MAP-21 (PL 112-141) to provide a "national priority on addressing the shortage of long-term parking for commercial motor vehicles on the National Highway System to improve the safety of motorized and non-motorized users and for commercial motor vehicle operators." Jason's Law required the USDOT to conduct a survey and comparative assessment in consultation with relevant State motor carrier representatives to: 1. Evaluate the capability of the State to provide adequate parking and rest facilities for commercial motor vehicles engaged in interstate transportation; 2. Assess the volume of commercial motor vehicle traffic in the State; and 3. Develop a system of metrics to measure the adequacy of commercial motor vehicle parking facilities in the State. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2025-12-30. If, in the future, you have trouble accessing this dataset, please email NTLDataCurator@dot.gov describing your problem. NTL staff will do its best to assist you at that time. AN - dot:88314 DO - https://doi.org/10.21949/1404309 KW - Data collection KW - Data files KW - Truck stops KW - Parking KW - Commercial vehicles KW - Highway facilities KW - Truck facilities LA - English PB - United States. Department of Transportation. Bureau of Transportation Statistics PY - 2017-01-01 T2 - National Transportation Atlas Database (NTAD) TI - National Transportation Atlas Database (NTAD): Truck Stop Parking 2017-Present [dataset] M3 - Dataset N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88314 ER -
National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset]

United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization

2019-01-01 | National Transportation Atlas Database (NTAD) | ZIP

The Time Zones 2019-Present dataset is from the Bureau of Transportation Statistics (BTS), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). This layer is a digital representation of the geographic boundaries of the nine time zones that cover the ...

01/05/2026

Supporting Files

Title : National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset] Corporate Creator(s) : United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization Published Date : 2019-01-01 Series : National Transportation Atlas Database (NTAD) DOI : https://doi.org/10.21949/1403512 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization (2019). National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset]. https://doi.org/10.21949/1403512 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset]" (2019), https://doi.org/10.21949/1403512 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset]" , 2019, https://doi.org/10.21949/1403512 Export RIS Citation Information. TY - Dataset A2 - United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization AB - The Time Zones 2019-Present dataset is from the Bureau of Transportation Statistics (BTS), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). This layer is a digital representation of the geographic boundaries of the nine time zones that cover the United States and its territories (the Atlantic, Eastern, Central, Mountain, Pacific, Alaska, Hawaii–Aleutian, Samoa, and Chamorro time zones). The U.S. Department of Transportation (DOT) oversees the Nation's time zones and the uniform observance of Daylight-Saving Time. The oversight of time zones was assigned to DOT due to the importance of time coordination for transportation related activities. The time zones were established by the Standard Time Act of 1918 and amended by the Uniform Time Act of 1966. Time zones in the U.S. are defined in the U.S. Code, Title 15, Chapter 6, Subchapter IX - Standard Time. The time zone boundaries are defined in the Code of Federal Regulations (CFR), Title 49, Subtitle A, Part 71 - Standard Time Zone Boundaries. Segments used to compile the geospatial layer were derived from the CFR’s time zone descriptions (https://www.ecfr.gov/current/title-49/subtitle-A/part-71). Descriptions consist of segments referencing administrative boundaries, infrastructure, natural features, and geodesic lines. These segments are contained in various data layers in the National Geospatial Data Asset (NGDA) portfolio, the federal government’s authoritative geospatial data repository. Referenced segments were extracted from their NGDA and then merged to form continuous boundaries. In instances where there were multiple scales for a given dataset, the largest scale or most detailed layer was used. The standard time of the Atlantic zone is the Coordinated Universal Time (UTC) minus 4 hours; Eastern zone is UTC minus 5 hours; Central zone is UTC minus 6 hours; Mountain zone is UTC minus 7 hours; Pacific zone is UTC minus 8 hours; Alaska zone is UTC minus 9 hours; Hawaii–Aleutian zone is UTC minus 10 hours; Samoa zone is UTC minus 11 hours; and Chamorro zone is UTC plus 10 hours. For more information, please visit: https://doi.org/10.21949/1519143. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2025-12-30. If, in the future, you have trouble accessing this dataset, please email NTLDataCurator@dot.gov describing your problem. NTL staff will do its best to assist you at that time. AN - dot:88313 DO - https://doi.org/10.21949/1403512 KW - Data collection KW - Data files KW - Time zones KW - Daylight saving time LA - English PB - United States. Department of Transportation. Bureau of Transportation Statistics PY - 2019-01-01 T2 - National Transportation Atlas Database (NTAD) TI - National Transportation Atlas Database (NTAD): Time Zones 2019-Present [dataset] M3 - Dataset N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88313 ER -
National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset]

United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization ...

1995-01-01 | National Transportation Atlas Database (NTAD) | ZIP

The Passenger Rail 1995 dataset is from the Federal Railroad Administration (FRA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). The Passenger Rail dataset is a geographic and topological network database of the U.S. commuter rail system, show ...

01/05/2026

Supporting Files

Title : National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset] Corporate Creator(s) : United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization;United States. Department of Transportation. Federal Railroad Administration; Published Date : 1995-01-01 Series : National Transportation Atlas Database (NTAD) DOI : https://doi.org/10.21949/1404318 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization (1995). National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset]. https://doi.org/10.21949/1404318 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset]" (1995), https://doi.org/10.21949/1404318 United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization "National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset]" , 1995, https://doi.org/10.21949/1404318 Export RIS Citation Information. TY - Dataset A2 - United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization A2 - United States. Department of Transportation. Federal Railroad Administration AB - The Passenger Rail 1995 dataset is from the Federal Railroad Administration (FRA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). The Passenger Rail dataset is a geographic and topological network database of the U.S. commuter rail system, showing right-of-way alignments. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2025-12-30. If, in the future, you have trouble accessing this dataset, please email NTLDataCurator@dot.gov describing your problem. NTL staff will do its best to assist you at that time. AN - dot:88312 DO - https://doi.org/10.21949/1404318 KW - Data collection KW - Data files KW - Railroads KW - Passenger trains KW - Geographic information systems LA - English PB - United States. Department of Transportation. Bureau of Transportation Statistics PY - 1995-01-01 T2 - National Transportation Atlas Database (NTAD) TI - National Transportation Atlas Database (NTAD): Passenger Rail 1995 [dataset] M3 - Dataset N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88312 ER -
Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset]

Raheem, Adeeba

;

Weidner, Jeffrey

2025-01-01 | ZIP

This data folder contains eight files (1 PPT, two Excel files, and five PDFs) featuring data collected through a survey conducted under the project “CY1-UTEP-03: Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation Among Transportation Agencies in Region 6.” The first file, “1_Summary of Responses - ...

01/05/2026

Supporting Files

Title : Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset] Creator(s) : Raheem, Adeeba;Weidner, Jeffrey;Guillen, Francisco I; Corporate Creator(s) : University of Texas at El Paso Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-01-01 URL : https://rosap.ntl.bts.gov/view/dot/88299 Raheem, Adeeba et al. (2025). Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset]. Raheem, Adeeba and Weidner, Jeffrey and Guillen, Francisco I "Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset]" (2025) Raheem, Adeeba et al. "Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset]" , 2025 Export RIS Citation Information. TY - Dataset AU - Raheem, Adeeba AU - Weidner, Jeffrey AU - Guillen, Francisco I A2 - University of Texas at El Paso A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This data folder contains eight files (1 PPT, two Excel files, and five PDFs) featuring data collected through a survey conducted under the project “CY1-UTEP-03: Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation Among Transportation Agencies in Region 6.” The first file, “1_Summary of Responses - SPTC BIM,” consists of a summary of survey responses prepared to present to the DOTs after the data analysis was completed. The file size is 1.75 MB. The second file, “2_QuestionPro-SR-RawData-SPTC BIM,” is the master Excel file created after collecting the data in raw format. The file size is 32 KB. The third file, “3_BIM Tools Comparison Matrix SPTC,” contains a comprehensive comparison of the existing BIM maturity assessment tools at the organizational level. The file size is 56 KB. The five PDF files are directly extracted from the QuestionPro software used to collect the survey responses in this project. AB - The file size ranges from 83 KB to 87 KB. AN - dot:88299 KW - Asset management KW - Implementation KW - Information management KW - Life cycle analysis KW - State departments of transportation KW - Data files LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-01-01 TI - Assessing Building Information Modeling (BIM) Maturity and Identifying Barriers to Implementation among Transportation Agencies in Region 6 [supporting dataset] M3 - Dataset N1 - United States N1 - 69A3552348306 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88299 ER -
Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data]

Zhang, Xukai

;

Noshadravan, Arash

2025-01-01 | XLSX

The submitted dataset, titled "Galveston Seawall Wave Overtopping Risk Prediction Dataset" is associated with the research project "Risk Assessment of Port Infrastructure Considering Uncertainty in Coastal Forcing and Changing Weather Patterns" under SPTC’s project 69A3552348306 (CY1-TAMU-02). This dataset, contained in a single 8.7MB Excel file, ...

01/05/2026

Supporting Files

Title : Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data] Creator(s) : Zhang, Xukai;Noshadravan, Arash; Corporate Creator(s) : Texas A&M University. Engineering Experiment Station Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-01-01 URL : https://rosap.ntl.bts.gov/view/dot/88298 Zhang, Xukai and Noshadravan, Arash (2025). Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data]. Zhang, Xukai and Noshadravan, Arash "Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data]" (2025) Zhang, Xukai and Noshadravan, Arash "Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data]" , 2025 Export RIS Citation Information. TY - Dataset AU - Zhang, Xukai AU - Noshadravan, Arash A2 - Texas A&M University. Engineering Experiment Station A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The submitted dataset, titled "Galveston Seawall Wave Overtopping Risk Prediction Dataset" is associated with the research project "Risk Assessment of Port Infrastructure Considering Uncertainty in Coastal Forcing and Changing Weather Patterns" under SPTC’s project 69A3552348306 (CY1-TAMU-02). This dataset, contained in a single 8.7MB Excel file, includes three spreadsheets: "Training and Test Dataset," "Prediction Dataset," and "Output of Prediction." The "Training and Test Dataset" consists of time-series data from 1995 to 2005, including offshore wave conditions (wave mean period and significant wave height), wind conditions (wind speed), tide levels at the seawall, local wind data, and sea water levels at the Galveston seawall, which were used to train the predictive model. The "Prediction Dataset" contains the same input parameters from 2026 to 2037 but excludes sea water level observations, serving as the input for forecasting. The "Output of Prediction" spreadsheet provides model-generated results, including uncertain wave conditions, mean sea water level rise projections from USACE, predicted sea water levels at the Galveston seawall, and the probability of failure due to wave overtopping. The dataset was compiled from publicly available sources, including NOAA Tide & Currents, the USACE Sea-Level Change Curve Calculator, and the USGS Coastal and Marine Geology Program (GFDL models). AN - dot:88298 KW - Data files KW - Coastal engineering KW - Disaster resilience KW - Life cycle analysis KW - Ports KW - Risk assessment KW - Sea level KW - Sea walls LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-01-01 TI - Risk Assessment of Coastal Infrastructure Considering Uncertainty in Coastal Forcing and Weather Pattern Impact [supporting data] M3 - Dataset N1 - United States N1 - 69A3552348306 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88298 ER -
Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file]

Elseifi, Mostafa A.

;

Liao, Haitao

2025-01-01 | XLSX

One excel file (125 kb). The spreadsheet covers test data categories including air void, IDEAL CTZ, TSR, Permeability, Drain Down, Rutting, CEI, Cantabro, BBS, and Cost Benefit Analysis.

01/05/2026

Supporting Files

Title : Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file] Creator(s) : Elseifi, Mostafa A.;Liao, Haitao;Christie, Kofi S S;Tanvir, S M;Azucena, Jose;Kumar, Nikesh; Corporate Creator(s) : Louisiana State University (Baton Rouge, La.). Department of Civil and Environmental Engineering;University of Arkansas, Fayetteville. Department of Industrial Engineering; Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-01-01 URL : https://rosap.ntl.bts.gov/view/dot/88292 Elseifi, Mostafa A. et al. (2025). Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file]. Elseifi, Mostafa A. et al. "Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file]" (2025) Elseifi, Mostafa A. et al. "Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file]" , 2025 Export RIS Citation Information. TY - Dataset AU - Elseifi, Mostafa A. AU - Liao, Haitao AU - Christie, Kofi S S AU - Tanvir, S M AU - Azucena, Jose AU - Kumar, Nikesh A2 - Louisiana State University (Baton Rouge, La.). Department of Civil and Environmental Engineering A2 - University of Arkansas, Fayetteville. Department of Industrial Engineering A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - One excel file (125 kb). The spreadsheet covers test data categories including air void, IDEAL CTZ, TSR, Permeability, Drain Down, Rutting, CEI, Cantabro, BBS, and Cost Benefit Analysis. AN - dot:88292 KW - Durability KW - Flexible pavements KW - Friction course KW - Mix design KW - Pavement performance KW - Porous pavements KW - Reclaimed asphalt pavements KW - Data files LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-01-01 TI - Next-Generation Permeable Pavement for Enhanced Durability and Functionality [supporting file] M3 - Dataset N1 - United States N1 - 69A3552348306 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88292 ER -
Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files]

Lynam, J.

;

Wasiuddin, Nazimuddin M.

2025-01-15 | XLSX

Data contains two excel files (56.5 KB and 163 KB respectively), that cover TSR and IDEAL-CT as well as IDEAL-CT Lignin.

01/05/2026

Supporting Files

Title : Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files] Creator(s) : Lynam, J.;Wasiuddin, Nazimuddin M.;Islam, Md Reazul;Tarannum, Nafisa;Elseifi, M.;Ali, Syed Ashik;Hobson, Kenneth; Corporate Creator(s) : Louisiana Tech University;Louisiana State University (Baton Rouge, La.);University of Oklahoma, Norman; Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-01-15 URL : https://rosap.ntl.bts.gov/view/dot/88283 Lynam, J. et al. (2025). Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files]. Lynam, J. et al. "Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files]" (2025) Lynam, J. et al. "Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files]" , 2025 Export RIS Citation Information. TY - Dataset AU - Lynam, J. AU - Wasiuddin, Nazimuddin M. AU - Islam, Md Reazul AU - Tarannum, Nafisa AU - Elseifi, M. AU - Ali, Syed Ashik AU - Hobson, Kenneth A2 - Louisiana Tech University A2 - Louisiana State University (Baton Rouge, La.) A2 - University of Oklahoma, Norman A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Data contains two excel files (56.5 KB and 163 KB respectively), that cover TSR and IDEAL-CT as well as IDEAL-CT Lignin. AN - dot:88283 KW - Asphalt mixtures KW - Binders KW - Lignin KW - Mix design KW - Pavement performance KW - Reclaimed asphalt pavements KW - Waste products (Materials) KW - Data files LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-01-15 TI - Replacing Fossil Fuel-Based Asphalt Binder with Lignin Binder from Wastes [supporting files] M3 - Dataset N1 - United States N1 - 69A3552348306 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88283 ER -
Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin

McCartt, Anne Taylor ;

Leaf, W. A.

2001-05-01 | PDF

In October 1998, the Milwaukee Police Department was awarded the first federally-funded Aggressive Driving Demonstration Grant by the U.S. Department of Transportation. This 18-month demonstration project was designed to study aggressive driving and provide information and enforcement results to law enforcement agencies across the U.S. The total gr ...

01/02/2026

Title : Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin Creator(s) : McCartt, Anne Taylor;Leaf, W. A.;Witkowski, T. L.;Solomon, M. G. (Mark Geoffrey); Corporate Creator(s) : Preusser Research Group, Inc. Corporate Contributor(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 2001-05-01 Report Number : DOT-HS-809-395;NTIS-PB2002102748; URL : https://rosap.ntl.bts.gov/view/dot/88282 McCartt, Anne Taylor et al. (2001). Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin. McCartt, Anne Taylor et al. "Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin" (2001) McCartt, Anne Taylor et al. "Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin" , 2001 Export RIS Citation Information. TY - Research Paper AU - McCartt, Anne Taylor AU - Leaf, W. A. AU - Witkowski, T. L. AU - Solomon, M. G. (Mark Geoffrey) A2 - Preusser Research Group, Inc. A3 - United States. Department of Transportation. National Highway Traffic Safety Administration A4 - O'Hara, Joe Ann; Witkowski, Terry L. AB - In October 1998, the Milwaukee Police Department was awarded the first federally-funded Aggressive Driving Demonstration Grant by the U.S. Department of Transportation. This 18-month demonstration project was designed to study aggressive driving and provide information and enforcement results to law enforcement agencies across the U.S. The total grant of $650,241 included a local match of $173,716. Milwaukee competed with law enforcement agencies from 26 other metropolitan areas for this grant. The goals of the project were to develop and evaluate an innovative enforcement strategy to reduce aggressive driving and to develop and evaluate public information and education programs to discourage aggressive driving. The first six months were devoted to gathering baseline data and developing the publicity plan and enforcement schedule. Milwaukee launched the six-month enforcement and awareness phase on March 30, 1999. This phase was organized into a series of three-week enforcement and publicity "sub-theme" campaigns, each focusing on a specific traffic offense commonly associated with aggressive driving and each with a distinctive slogan. The final six months provided time for the project to be evaluated and this report to be prepared. The process evaluation indicated the program was exemplary in terms of planning, coordination, and implementation. Considerable special enforcement was undertaken, and a number of innovative strategies, including innovative technologies, were useful in identifying and apprehending aggressive drivers. Based on an outcome evaluation, the program demonstrated the effects of targeted enforcement. More citations were issued for violations associated with aggressive driving (not just speed citations); red light-running behaviors changed at targeted intersections; and crash reduction was demonstrated citywide, with greater reductions on corridors with targeted enforcement. Programs of this type could likely be improved with paid media as well as earned media so that more visible, focused media attention could be gained. AN - dot:88282 KW - Aggression KW - Drivers KW - Law enforcement KW - Public information programs KW - Impact studies KW - Aggressive driving LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2001-05-01 SN - DOT-HS-809-395 TI - Evaluation of the Aggression Suppression Program, Milwaukee, Wisconsin M3 - Research Paper N1 - Wisconsin N1 - DTNH-22-98-H-05107 UR - https://rosap.ntl.bts.gov/view/dot/88282 ER -
Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience

Bhaskar, Puneet

;

Goehl, Darlene C.

2025-01-15 | PDF

Coastal communities of Texas and Louisiana primarily rely on road infrastructure for their transportation and access to goods and services. Due to surge in extreme rainfall and storm events, coastal infrastructure is at pressing risk. The aggressive infiltration of water in highway embankment slopes due to flooding declines its functional and struc ...

12/29/2025

Title : Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience Creator(s) : Bhaskar, Puneet;Goehl, Darlene C.;Puppala, Anand J.;Suarez, Jaime; Corporate Creator(s) : Texas A&M Transportation Institute;Texas A&M University. Zachry Department of Civil Engineering; Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-01-15 Report Number : CY1-TTI-02 URL : https://rosap.ntl.bts.gov/view/dot/88281 Bhaskar, Puneet et al. (2025). Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience. Bhaskar, Puneet et al. "Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience" (2025) Bhaskar, Puneet et al. "Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience" , 2025 Export RIS Citation Information. TY - Tech Report AU - Bhaskar, Puneet AU - Goehl, Darlene C. AU - Puppala, Anand J. AU - Suarez, Jaime A2 - Texas A&M Transportation Institute A2 - Texas A&M University. Zachry Department of Civil Engineering A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Coastal communities of Texas and Louisiana primarily rely on road infrastructure for their transportation and access to goods and services. Due to surge in extreme rainfall and storm events, coastal infrastructure is at pressing risk. The aggressive infiltration of water in highway embankment slopes due to flooding declines its functional and structural performance gradually. Most of the commonly used geosynthetics do not help with drainage under both saturated and unsaturated conditions. A novel geotextile with special hydrophilic and hygroscopic wicking fibers is gaining popularity due to its multiple functions, including separation, reinforcement, gravity drainage, and capillary drainage through wicking action. This research study focuses on understanding the effect of flooding and drainage on interface strength of wicking geotextile, a crucial parameter in the design of reinforced slopes. A large-scale direct shear box was used to conduct interface tests with wicking geotextile. Tests were performed immediately after flooding and after seven days to capture the effects of wicking-induced drainage on interface strength properties. The drainage capability of wicking geotextile was also evaluated at different normal stress levels. Additionally, a finite element model was developed, and numerical analyses were conducted to examine effect of interface strength properties of wicking geotextile on safety factors of slope subjected to flooding. The findings prioritize the use of wicking geotextiles with for better drainage and interface strength to ensure enhanced slope stability under saturated and unsaturated conditions. It also suggests application of wicking geotextiles as part of an integrated flood management strategy for coastal transportation infrastructure to mitigate the effects of storm surges and heavy precipitation. AN - dot:88281 ET - Final Report (09/2023 – 12/2024) KW - Coasts KW - Drainage KW - Floods KW - Geosynthetics KW - Geotextiles KW - Moisture content KW - Pavement design KW - Shear tests LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-01-15 SN - CY1-TTI-02 TI - Multifunctional Geosynthetic-Based Stabilization to Increase Coastal Infrastructure Resilience M3 - Tech Report N1 - United States N1 - 69A3552348306 UR - https://rosap.ntl.bts.gov/view/dot/88281 ER -
Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life

Dorsett, Garrett

;

Scullion, Tom

2025-11-01 | PDF

Extreme heat events expose pavements to more intense and prolonged stress. These events, coupled with soil movement from heavy rainfall and drought also threaten pavement functional and structural life. State and local agencies have benefited from innovative technologies and tools developed to rapidly assess pavement condition, but data has not yet ...

12/29/2025

Title : Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life Creator(s) : Dorsett, Garrett;Scullion, Tom; Corporate Creator(s) : Texas Transportation Institute Corporate Contributor(s) : The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-11-01 Report Number : CY1-TTI-01 URL : https://rosap.ntl.bts.gov/view/dot/88280 Dorsett, Garrett and Scullion, Tom (2025). Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life. Dorsett, Garrett and Scullion, Tom "Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life" (2025) Dorsett, Garrett and Scullion, Tom "Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life" , 2025 Export RIS Citation Information. TY - Tech Report AU - Dorsett, Garrett AU - Scullion, Tom A2 - Texas Transportation Institute A3 - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Extreme heat events expose pavements to more intense and prolonged stress. These events, coupled with soil movement from heavy rainfall and drought also threaten pavement functional and structural life. State and local agencies have benefited from innovative technologies and tools developed to rapidly assess pavement condition, but data has not yet been widely implemented into pavement management systems that provide cohesive, wholistic assessments of state roadways. A hybrid approach combining traffic speed deflectometer (TSD) and air coupled ground penetrating radar (GPR) is examined that will allow for large-scale data collection and analysis for use in state pavement management systems. The ideas presented in this study outline best practices for leveraging deflection data produced by TSD at the network- and project-levels, including merging TSD and GPR field data to enhance pavement engineers’ understanding of in-situ pavement structural conditions. These strategies were applied in the field and greatly assisted in identifying failed and at-risk pavements and prioritizing future projects. The remaining life estimation and material modulus back calculation methods produced in this study will continue to be modified and improved to better match predictions generated by existing state practices. AN - dot:88280 ET - Final Report, September 2023- September 2024 KW - Forecasting KW - Machine learning KW - Neural networks KW - Pavement management systems KW - Pavement performance KW - Roughness KW - Service life LA - English PB - The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) PY - 2025-11-01 SN - CY1-TTI-01 TI - Integration and Deployment of Novel Tools for Rapid Assessment of Pavement Conditions and Remaining Life M3 - Tech Report N1 - United States N1 - 69A3552348306 UR - https://rosap.ntl.bts.gov/view/dot/88280 ER -
Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility

Hou, Zenghao

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 ...

12/29/2025

Title : Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility Creator(s) : Hou, Zenghao Corporate Creator(s) : University of California, Davis. Department of Civil and Environmental Engineering Published Date : 2023-01-01 URL : https://rosap.ntl.bts.gov/view/dot/88279 Hou, Zenghao (2023). Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility. Hou, Zenghao "Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility" (2023) Hou, Zenghao "Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility" , 2023 Export RIS Citation Information. TY - Thesis AU - Hou, Zenghao A2 - University of California, Davis. Department of Civil and Environmental Engineering AB - 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 become an increasingly challenging task. Travel demand management (TDM) is a set of strategies aimed at redistributing travel demand in time or space to alleviate the imbalance between travel demand and available infrastructure capacities. Active transportation (AT), which includes walking and cycling, has emerged as a popular TDM approach in modern urban areas, with the potential to reduce vehicular travel (VT) demand and alleviate traffic congestion. However, potential barriers such as longer commuting times and adverse health effects, including exposure to hazardous air pollution and traffic injuries, often dissuade travelers from choosing AT. Therefore, understanding the complex relationship between AT and VT demand is crucial, especially when considering the health effects associated with these modes of transportation, such as the negative impact of air pollution and the benefits of physical activity. AN - dot:88279 KW - Mode choice KW - Multimodal transportation KW - Nonmotorized transportation KW - Shared mobility LA - English PB - University of California, Davis PY - 2023-01-01 TI - Modeling Multi-Modal Network Equilibrium with Active Transportation and Shared Mobility M3 - Thesis N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88279 ER -
Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads

Kong, Taeyun

;

Kothari, Chirayu

2025-12-01 | PDF

This study investigated the mechanical strength and freeze-thaw durability of carbonate-based aggregate quarry by-products (QBs) stabilized with cement alone and in combination with calcined clay (metakaolin, MK) for potential use in pavement foundation layers. The primary objective was to evaluate the chemical and physical characteristics of dolom ...

12/29/2025

Title : Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads Creator(s) : Kong, Taeyun;Kothari, Chirayu;Qamhia, Issam I. A.;Tutumluer, Erol;Garg, Nishant; Corporate Creator(s) : Illinois Center for Transportation;University of Illinois at Urbana-Champaign. Department of Civil and Environmental Engineering; Corporate Contributor(s) : Illinois Department of Transportation. Bureau of Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-12-01 Report Number : FHWA-ICT-25-013 DOI : https://doi.org/10.36501/0197-9191/25-013 Kong, Taeyun et al. (2025). Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads. https://doi.org/10.36501/0197-9191/25-013 Kong, Taeyun et al. "Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads" (2025), https://doi.org/10.36501/0197-9191/25-013 Kong, Taeyun et al. "Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads" , 2025, https://doi.org/10.36501/0197-9191/25-013 Export RIS Citation Information. TY - Tech Report AU - Kong, Taeyun AU - Kothari, Chirayu AU - Qamhia, Issam I. A. AU - Tutumluer, Erol AU - Garg, Nishant A2 - Illinois Center for Transportation A2 - University of Illinois at Urbana-Champaign. Department of Civil and Environmental Engineering A3 - Illinois Department of Transportation. Bureau of Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This study investigated the mechanical strength and freeze-thaw durability of carbonate-based aggregate quarry by-products (QBs) stabilized with cement alone and in combination with calcined clay (metakaolin, MK) for potential use in pavement foundation layers. The primary objective was to evaluate the chemical and physical characteristics of dolomitic and limestone QBs and determine how these factors influence strength development and durability under different stabilization conditions. Four QBs with varying carbonate compositions, ranging from highly dolomitic aggregates to nearly pure limestone, were examined. QBs were stabilized with 3% cement and tested under short- and long-term curing conditions. Short-term testing indicated the curing period was insufficient for the mineralogical properties of carbonate aggregates to fully manifest; instead, performance was governed primarily by physical characteristics, particularly particle packing. In contrast, long-term testing showed the effects of carbonate mineralogy became more pronounced, as the mineral components began contributing more noticeably to overall performance. Dolomitic QBs demonstrated superior strength and stiffness development along with higher retention of these properties after 10 freeze-thaw cycles due to the formation of hydrotalcite, a magnesium-aluminum layered double hydroxide phase. When cement was partially replaced with MK at the optimum MK-to-cement ratio of 1:4, both early-age and long-term performance improved relative to cement-only specimens. Chemical analyses showed that MK participated in pozzolanic and carboaluminate reactions, producing additional calcium-alumino-silicate-hydrate (C-A-S-H) gels and carboaluminate phases. Since MK rapidly consumed available calcium hydroxide to form C-A-S-H gel and carboaluminate phases, hydrotalcite formation was suppressed. This mechanism resulted in comparable long-term performance for all QBs, irrespective of carbonate types. The findings demonstrate that carbonate-based QBs can be transformed into high-performing, durable, and sustainable pavement foundation materials when their physical and mineralogical properties are considered properly and supplementary cementitious materials such as MK are incorporated effectively. AN - dot:88278 DO - https://doi.org/10.36501/0197-9191/25-013 ET - Final Report 7/1/22–12/31/25 KW - Aggregates KW - Bonding KW - Compressive strength KW - Dolomite KW - Fine aggregates KW - Pavement performance KW - Quarries KW - Freeze thaw durability KW - Hydrotalcite LA - English PB - Illinois Center for Transportation PY - 2025-12-01 SN - FHWA-ICT-25-013 TI - Investigation of Dolomite Aggregate Long-Term Cementation and Its Potential Advantage for Building Roads M3 - Tech Report N1 - United States N1 - R27 UR - https://rosap.ntl.bts.gov/view/dot/88278 ER -
Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief]

Ahmed, Mohamed M ;

Gaweesh, Sherif

2019-05-01 | PDF

This study is considered a first step toward validating applicability of the Highway Safety Manual (HSM) Part D to Wyoming conditions. The HSM Part D provides a quantitative measure of safety for various countermeasures known as crash modification factors (CMF). These CMFs are provided for four distinct groups of treatments: roadway segments (e.g., ...

12/29/2025

Title : Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief] Creator(s) : Ahmed, Mohamed M;Gaweesh, Sherif;Hossain, Md Julfiker;Sharmin, Sadia;Peel, Thomas; Corporate Creator(s) : Mountain-Plains Consortium Corporate Contributor(s) : University of Wyoming. Department of Civil and Architectural Engineering;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;Wyoming. Department of Transportation; Published Date : 2019-05-01 Report Number : MPC 19-385 URL : https://rosap.ntl.bts.gov/view/dot/88277 Ahmed, Mohamed M et al. (2019). Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief]. Ahmed, Mohamed M et al. "Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief]" (2019) Ahmed, Mohamed M et al. "Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief]" , 2019 Export RIS Citation Information. TY - Brief AU - Ahmed, Mohamed M AU - Gaweesh, Sherif AU - Hossain, Md Julfiker AU - Sharmin, Sadia AU - Peel, Thomas A2 - Mountain-Plains Consortium A3 - University of Wyoming. Department of Civil and Architectural Engineering A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - Wyoming. Department of Transportation AB - This study is considered a first step toward validating applicability of the Highway Safety Manual (HSM) Part D to Wyoming conditions. The HSM Part D provides a quantitative measure of safety for various countermeasures known as crash modification factors (CMF). These CMFs are provided for four distinct groups of treatments: roadway segments (e.g., rumble strips, passing lanes, etc.), intersections (e.g., flashing yellow arrows), special facilities (e.g., Highway-rail crossings, and interchanges), and road networks. CMFs provided in the HSM Part D are calibrated based on data collected from a few states in the United States, which may not represent the same safety efficacy of countermeasures implemented in Wyoming. The objectives of this study are to (1) validate applicability of the HSM Part D to Wyoming conditions, (2) calibrate CMFs for various countermeasures in Wyoming, and (3) provide recommendations in terms of data requirements, how to mitigate data shortcoming, and applicability of alternative analytical methodologies to evaluate the safety effectiveness of specific countermeasures. Depending on data availability, various observational before-after and cross-sectional techniques were adopted in this study to calibrate CMFs for six countermeasures applied to roadway segments, intersections, and special facilities. Results indicated that the majority of these countermeasures are statistically significant in reducing crash frequency and severity. Moreover, CMFs from the HSM and Clearinghouse should not be implemented in Wyoming without proper calibration and validation. Wyoming conditions are unique and therefore, site-specific Safety Performance Functions (SPFs) and Crash Modification Factors (CMFs) must be calibrated and updated every five years. AN - dot:88277 ET - Research Brief KW - Calibration KW - Countermeasures KW - Crash modification factors KW - Highway safety KW - Validation LA - English PB - Mountain-Plains Consortium PY - 2019-05-01 SN - MPC 19-385 TI - Highway Safety Manual Part D: Validation and Application in Wyoming [Research Brief] M3 - Brief N1 - United States N1 - MPC-474 UR - https://rosap.ntl.bts.gov/view/dot/88277 ER -
Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief]

Lu, Pan

;

Bridgelall, Raj

2019-07-01 | PDF

Federal track safety regulations require railroads to inspect all tracks in operation as often as twice weekly. Railroad companies deploy expensive and relatively slow methods using human inspectors and expensive automated inspection vehicles to inspect and monitor their rail tracks. The current practices are not only expensive and decrease rail pr ...

12/29/2025

Title : Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief] Creator(s) : Lu, Pan;Bridgelall, Raj;Tolliver, Denver;Chia, Leonard;Bhardwaj, Bhavana; Corporate Creator(s) : Mountain-Plains Consortium;North Dakota State University; Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2019-07-01 Report Number : MPC 19-384 URL : https://rosap.ntl.bts.gov/view/dot/88276 Lu, Pan et al. (2019). Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief]. Lu, Pan et al. "Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief]" (2019) Lu, Pan et al. "Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief]" , 2019 Export RIS Citation Information. TY - Tech Report AU - Lu, Pan AU - Bridgelall, Raj AU - Tolliver, Denver AU - Chia, Leonard AU - Bhardwaj, Bhavana A2 - Mountain-Plains Consortium A2 - North Dakota State University A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Federal track safety regulations require railroads to inspect all tracks in operation as often as twice weekly. Railroad companies deploy expensive and relatively slow methods using human inspectors and expensive automated inspection vehicles to inspect and monitor their rail tracks. The current practices are not only expensive and decrease rail productivity by taking away track time to perform inspection, but also increase the safety risk for railway inspection workers. Sensors, such as inertial sensors, accelerometers, gyroscopic sensors, and global positioning system (GPS), are carried on a railway vehicle to continually monitor and inspect rail assets to meet the growing safety improvement needs for reliable and low-cost rail operations. Smartphones use such sensor networks, including wireless communication microchips. In this research, smartphone-based signaling data collection applications, data fusion algorithms, and data processing algorithms to detect a wide variety of possible track surface abnormalities are developed and validated. The research methods will not rely on adapting sensor configurations, and will require only a data upload capability. The new sensors will compress and upload their geo-tagged inertial data periodically to a centralized processor. Remote algorithms will combine and process the data from multiple train traversals to identify abnormal track surface symptoms, and localize their positions. Track surface abnormality identification will enable asset managers to allocate the appropriate specialists to scrutinize the abnormality location. AN - dot:88276 ET - Research Brief KW - Algorithms KW - Flaw detection KW - Information processing KW - Inspection KW - Intelligent transportation systems KW - Maintenance of way KW - Mobile applications KW - Railroad safety KW - Railroad tracks KW - Sensors KW - Validation LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC 19-384 TI - Intelligent Transportation Systems Approach to Railroad Infrastructure Performance Evaluation: Track Surface Abnormality Identification with Smartphone-Based App [Research Brief] M3 - Tech Report N1 - United States N1 - MPC-505 UR - https://rosap.ntl.bts.gov/view/dot/88276 ER -
Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief]

Ibarra, Luis ;

Tucker, Catherine

2019-07-01 | PDF

This study evaluates the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC) projects. CCFT components are considered of interest for bridges subjected to seismic forces due to their efficient structural behavior under combined axial and bending loads: lateral stiffness of the steel tube is i ...

12/29/2025

Title : Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief] Creator(s) : Ibarra, Luis;Tucker, Catherine; Corporate Creator(s) : University of Utah. Department of Civil and Environmental Engineering Corporate Contributor(s) : Mountain-Plains Consortium;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2019-07-01 Report Number : MPC 19-383 URL : https://rosap.ntl.bts.gov/view/dot/88275 Ibarra, Luis and Tucker, Catherine (2019). Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief]. Ibarra, Luis and Tucker, Catherine "Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief]" (2019) Ibarra, Luis and Tucker, Catherine "Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief]" , 2019 Export RIS Citation Information. TY - Brief AU - Ibarra, Luis AU - Tucker, Catherine A2 - University of Utah. Department of Civil and Environmental Engineering A3 - Mountain-Plains Consortium A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This study evaluates the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC) projects. CCFT components are considered of interest for bridges subjected to seismic forces due to their efficient structural behavior under combined axial and bending loads: lateral stiffness of the steel tube is increased by the concrete, and concrete confinement is provided by the steel tube. This research addresses the ability of CCFT columns to perform adequately under gravitational and seismic loading before the concrete reaches its design strength. A reduced seismic hazard that accounts for this temporal condition is also implemented. Performance evaluation is based on the probability of failure of the CCFT column. AN - dot:88275 ET - Research Brief KW - Bridge construction KW - Calibration KW - Columns KW - Compressive strength KW - Concrete KW - Earthquake resistant design KW - Failure analysis KW - Load tests LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC 19-383 TI - Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction [Research Brief] M3 - Brief N1 - United States N1 - MPC-404 UR - https://rosap.ntl.bts.gov/view/dot/88275 ER -
Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction

Tucker, Catherine ;

Ibarra, Luis

2019-07-01 | PDF

This study evaluates the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC) projects. CCFT components are considered of interest for bridges subjected to seismic forces due to their efficient structural behavior under combined axial and bending loads: lateral stiffness of the steel tube is i ...

12/29/2025

Title : Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction Creator(s) : Tucker, Catherine;Ibarra, Luis; Corporate Creator(s) : University of Utah. Department of Civil and Environmental Engineering Corporate Contributor(s) : Mountain-Plains Consortium;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2019-07-01 Report Number : MPC 19-383 URL : https://rosap.ntl.bts.gov/view/dot/88274 Tucker, Catherine and Ibarra, Luis (2019). Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction. Tucker, Catherine and Ibarra, Luis "Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction" (2019) Tucker, Catherine and Ibarra, Luis "Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction" , 2019 Export RIS Citation Information. TY - Tech Report AU - Tucker, Catherine AU - Ibarra, Luis A2 - University of Utah. Department of Civil and Environmental Engineering A3 - Mountain-Plains Consortium A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This study evaluates the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC) projects. CCFT components are considered of interest for bridges subjected to seismic forces due to their efficient structural behavior under combined axial and bending loads: lateral stiffness of the steel tube is increased by the concrete, and concrete confinement is provided by the steel tube. This research addresses the ability of CCFT columns to perform adequately under gravitational and seismic loading before the concrete reaches its design strength. A reduced seismic hazard that accounts for this temporal condition is also implemented. Performance evaluation is based on the probability of failure of the CCFT column. AN - dot:88274 KW - Bridge construction KW - Calibration KW - Columns KW - Compressive strength KW - Concrete KW - Earthquake resistant design KW - Failure analysis KW - Load tests LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC 19-383 TI - Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction M3 - Tech Report N1 - United States N1 - MPC-404 UR - https://rosap.ntl.bts.gov/view/dot/88274 ER -
Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM)

Hanson, Todd

;

McDaniel, Lisa

2019-01-01 | PDF

Concrete has traditionally been accepted by testing air, slump, and strength. However, these test methods usually do not have a direct relationship with long term durability. A number of new test methods have been developed that give a better prediction of long-term performance. On a recent paving project on US 20 in Woodbury County, Iowa, several ...

12/29/2025

Title : Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM) Creator(s) : Hanson, Todd;McDaniel, Lisa; Corporate Creator(s) : Iowa. Department of Transportation. Construction and Materials Bureau Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2019-01-01 Report Number : MLR-19-01 URL : https://rosap.ntl.bts.gov/view/dot/88273 Hanson, Todd and McDaniel, Lisa (2019). Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM). Hanson, Todd and McDaniel, Lisa "Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM)" (2019) Hanson, Todd and McDaniel, Lisa "Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM)" , 2019 Export RIS Citation Information. TY - Tech Report AU - Hanson, Todd AU - McDaniel, Lisa A2 - Iowa. Department of Transportation. Construction and Materials Bureau A3 - United States. Department of Transportation. Federal Highway Administration AB - Concrete has traditionally been accepted by testing air, slump, and strength. However, these test methods usually do not have a direct relationship with long term durability. A number of new test methods have been developed that give a better prediction of long-term performance. On a recent paving project on US 20 in Woodbury County, Iowa, several of the new test methods were evaluated to gain experience with the test methods and determine viability of using test methods for quality control and acceptance. The contractor performed quality control (QC) shadow testing using the SAM air meter test for air and freeze thaw potential, box test for workability, and resistivity testing for fluid transport properties. The Federal Highway Administration (FHWA) Mobile Concrete Laboratory was also on the project collecting data for the PEM pooled fund project. Results indicated the new test methods are repeatable and provide valuable information on long term performance potential for concrete pavements. AN - dot:88273 ET - Final Report (July 2018 to October 2019) KW - Performance measurement KW - Admixtures KW - Resistivity method KW - Concrete pavements KW - Electrical resistivity KW - Performance based specifications KW - Mix design LA - English PB - Iowa Department of Transportation PY - 2019-01-01 SN - MLR-19-01 TI - Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM) M3 - Tech Report N1 - United States N1 - TPF-5(368) UR - https://rosap.ntl.bts.gov/view/dot/88273 ER -

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