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Showing 201 - 220 of 427 results

Lightning Simulation Test Technique Evaluation

Cooley, William W. ;

Shortess, Deborah L.

1988-10-01 | PDF

This report documents the results of four separate lightning simulation tests on a specially designed test bed aircraft. The simulation techniques used are low-level swept continuous wave, low-level fast rise pulse, moderate-level pulse, and shock-excitation. The test bed is made up of advanced composite materials with built-in lightning protection ...

08/17/2026

Title : Lightning Simulation Test Technique Evaluation Creator(s) : Cooley, William W.;Shortess, Deborah L.; Corporate Creator(s) : Science and Engineering Associates, Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-10-01 Report Number : DOT/FAA/CT-87/38 URL : https://rosap.ntl.bts.gov/view/dot/92947
Cooley, William W. and Shortess, Deborah L. (1988). Lightning Simulation Test Technique Evaluation.

Cooley, William W. and Shortess, Deborah L. "Lightning Simulation Test Technique Evaluation" (1988)

Cooley, William W. and Shortess, Deborah L. "Lightning Simulation Test Technique Evaluation" , 1988
Export RIS Citation Information. TY - Tech Report AU - Cooley, William W. AU - Shortess, Deborah L. A2 - Science and Engineering Associates, Inc A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report documents the results of four separate lightning simulation tests on a specially designed test bed aircraft. The simulation techniques used are low-level swept continuous wave, low-level fast rise pulse, moderate-level pulse, and shock-excitation. The test bed is made up of advanced composite materials with built-in lightning protection and electrical equipment installations. This configuration is electrically and geometrically representative of a general aviation heavy single engine aircraft. Comparative data was developed to determine the effectiveness of the four test methods and used to quantify the differences between them. Analysis necessary to extrapolate the results of the tests to the severe lightning environment is discussed. Predicted values from computer models are compared with test results. AN - dot:92947 ET - Final Report KW - Aircraft KW - Lightning KW - Simulation KW - Test beds KW - Test procedures LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988-10-01 SN - DOT/FAA/CT-87/38 TI - Lightning Simulation Test Technique Evaluation M3 - Tech Report N1 - United States N1 - DTFA03-84-C-00064 UR - https://rosap.ntl.bts.gov/view/dot/92947 ER - DB - ROSA P
De-Icing of Aircraft Turbine Engine Inlets

Rosenthal, H. A. ;

Nelepovitz, D. O.

1988-06-01 | PDF

This document presents the results of an FAA investigation to determine the effects of using de-icing, as opposed to anti-icing, in aircraft turbine engine inlets. A literature search was conducted. Ice protection equipment technology was assessed. This report describes the icing/de-icing process, discusses de-ice system operation and performance a ...

08/17/2026

Title : De-Icing of Aircraft Turbine Engine Inlets Creator(s) : Rosenthal, H. A.;Nelepovitz, D. O.;Rockholt, H. M.; Corporate Creator(s) : Rohr Industries, Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-06-01 Report Number : DOT/FAA/cr-87/~ URL : https://rosap.ntl.bts.gov/view/dot/92946
Rosenthal, H. A. et al. (1988). De-Icing of Aircraft Turbine Engine Inlets.

Rosenthal, H. A. and Nelepovitz, D. O. and Rockholt, H. M. "De-Icing of Aircraft Turbine Engine Inlets" (1988)

Rosenthal, H. A. et al. "De-Icing of Aircraft Turbine Engine Inlets" , 1988
Export RIS Citation Information. TY - Tech Report AU - Rosenthal, H. A. AU - Nelepovitz, D. O. AU - Rockholt, H. M. A2 - Rohr Industries, Inc A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A4 - Frings, Gary AB - This document presents the results of an FAA investigation to determine the effects of using de-icing, as opposed to anti-icing, in aircraft turbine engine inlets. A literature search was conducted. Ice protection equipment technology was assessed. This report describes the icing/de-icing process, discusses de-ice system operation and performance and ice detector characteristics, and presents a method for determining the effects of the de-icing process on the turbine engine and its associated induction system. AN - dot:92946 ET - Final Report KW - Airplanes KW - Deicing chemicals KW - Ice prevention KW - Turbines LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988-06-01 SN - DOT/FAA/cr-87/~ TI - De-Icing of Aircraft Turbine Engine Inlets M3 - Tech Report N1 - United States N1 - DTFA03-86-C-0050 UR - https://rosap.ntl.bts.gov/view/dot/92946 ER - DB - ROSA P
New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document

United States. Department of Transportation. Federal Aviation Administration. Technical Center ...

1987-08-01 | PDF

This document is the concluding report in a project whose objective was to convert in a reasonably short period of time, machine dependent software to a higher order language capable of running on any general purpose computer. A subset of the New York (N. Y.) TRACON (version A5.04) software was chosen for conversion, specifically, the tracking algo ...

08/17/2026

Title : New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center;Data Transformation Corporation; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1987-08-01 Report Number : DOT/FAA/CT-87/33 URL : https://rosap.ntl.bts.gov/view/dot/92945
United States. Department of Transportation. Federal Aviation Administration. Technical Center (1987). New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document.

United States. Department of Transportation. Federal Aviation Administration. Technical Center "New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document" (1987)

United States. Department of Transportation. Federal Aviation Administration. Technical Center "New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document" , 1987
Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A2 - Data Transformation Corporation A3 - United States. Department of Transportation. Federal Aviation Administration AB - This document is the concluding report in a project whose objective was to convert in a reasonably short period of time, machine dependent software to a higher order language capable of running on any general purpose computer. A subset of the New York (N. Y.) TRACON (version A5.04) software was chosen for conversion, specifically, the tracking algorithms. The effort concluded with a demonstration of the converted software running on an IBM 3080 processor and was presented on a Sony display. The present UNIVAC ULTRA programs were converted to ADA/POL and the system implemented in PASCAL. Over 53,000 lines of ULTRA source code were converted to 47,000 lines of ADA/POL (including commentary) and then to 32,000 lines of PASCAL (without commentary). The project was concluded in 9 months with the successful demonstration. AN - dot:92945 ET - Final Report KW - Air traffic control KW - Information processing KW - Radar air traffic control LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987-08-01 SN - DOT/FAA/CT-87/33 TI - New York TRACON Demonstration of Program Recoding Software Translation and Verification Methodology Document M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92945 ER - DB - ROSA P
Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents

Speitel, L. C. ;

Hill, R. G.

1988-03-01 | PDF

A computer model was developed and utilized for calculating the benefits of passenger protective breathing devices and other fire safety improvements based on an analysis of accidents involving fire occurring from 1966 to 1986. The results of exercising this model on 20 past accidents indicate that the lives saved is very sensitive to assumption. I ...

08/17/2026

Title : Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents Creator(s) : Speitel, L. C.;Hill, R. G.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-03-01 Report Number : DOT/FAA/CT-88/03 URL : https://rosap.ntl.bts.gov/view/dot/92944
Speitel, L. C. and Hill, R. G. (1988). Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents.

Speitel, L. C. and Hill, R. G. "Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents" (1988)

Speitel, L. C. and Hill, R. G. "Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents" , 1988
Export RIS Citation Information. TY - Tech Report AU - Speitel, L. C. AU - Hill, R. G. A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - A computer model was developed and utilized for calculating the benefits of passenger protective breathing devices and other fire safety improvements based on an analysis of accidents involving fire occurring from 1966 to 1986. The results of exercising this model on 20 past accidents indicate that the lives saved is very sensitive to assumption. It was determined that seat cushion fire blocking (FB) would have saved almost half the lives. Floor proximity lighting (FPL) is much less effective than FB, saving 3 to 4 percent of fire deaths. Protective breathing equipment (PBE), assuming no donning delay and 100 percent usage by passengers is more effective than FPL. However, a 15 second donning delay of PBE may have resulted in a net disbenefit. AN - dot:92944 ET - Final Report KW - Aircraft KW - Breathing apparatus KW - Chemical reduction KW - Estimates KW - Fatalities KW - Fires LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988-03-01 SN - DOT/FAA/CT-88/03 TI - Study of Benefits of Passenger Protective Breathing Equipment From Analysis of Past Accidents M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92944 ER - DB - ROSA P
Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System

Russell, Christopher P. ;

Santi, Paul

2008-09-01 | PDF

The purpose of this study was to improve the current Rockfall Hazard Rating System (RHRS) in use by the Colorado Department of Transportation (CDOT) by adding several climatic and geological factors recognized in technical literature that contribute to rockfall. Once the system was improved, 200 slopes were rated within the Colorado Front Range: 10 ...

08/17/2026

Title : Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System Creator(s) : Russell, Christopher P.;Santi, Paul;Higgins, Jerry D.; Corporate Creator(s) : Colorado School of Mines Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-09-01 Report Number : CDOT-2008-7 URL : https://rosap.ntl.bts.gov/view/dot/92943
Russell, Christopher P. et al. (2008). Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System.

Russell, Christopher P. and Santi, Paul and Higgins, Jerry D. "Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System" (2008)

Russell, Christopher P. et al. "Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System" , 2008
Export RIS Citation Information. TY - Tech Report AU - Russell, Christopher P. AU - Santi, Paul AU - Higgins, Jerry D. A2 - Colorado School of Mines A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - The purpose of this study was to improve the current Rockfall Hazard Rating System (RHRS) in use by the Colorado Department of Transportation (CDOT) by adding several climatic and geological factors recognized in technical literature that contribute to rockfall. Once the system was improved, 200 slopes were rated within the Colorado Front Range: 106 crystalline cut slopes (a crystalline rock cut); 51 crystalline total slopes (both a cut and the natural slope above); 35 block-in-matrix slopes; and 8 sedimentary slopes. The resulting data for each slope type was analyzed using univariate least squares regression, multivariate ordinal logistic regression, and multivariate stepwise regression to identify and rank the dominating factors that contribute to rockfall. The rank of the new scores for the 200 slopes was compared to the rank of the original scores to ensure that the modifications allow for a better prediction of rockfall potential. AN - dot:92943 ET - Final Report KW - Embankments KW - Geology KW - Hazard analysis KW - Logistic regression analysis KW - Regression analysis KW - Rock slopes KW - Rockfalls KW - Sedimentary rocks KW - Weather conditions KW - Statistical analysis KW - Ratings KW - Literature reviews KW - Data analysis KW - Rockfall Hazard Rating System (RHRS) KW - cut slopes KW - total slopes KW - crystalline slopes KW - sedimentary slopes KW - block-in-matrix slopes KW - hazard rank KW - univariate least squares regression KW - multivariate ordinal logistic regression KW - multivariate stepwise regression LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-09-01 SN - CDOT-2008-7 TI - Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92943 ER - DB - ROSA P
Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach

Hsu, Chengmin ;

Johnson, Lynn

2008-09-01 | PDF

The Colorado Department of Transportation (CDOT) has the challenging task of protecting the environment while developing and maintaining the best transportation systems and services possible for the citizens of Colorado. Among these tasks, a wetland inventory database is a key component required to meet the environmental protection mandate. The sub ...

08/17/2026

Title : Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach Creator(s) : Hsu, Chengmin;Johnson, Lynn; Corporate Creator(s) : University of Colorado at Denver. Department of Civil Engineering Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-09-01 Report Number : CDOT-2008-8 URL : https://rosap.ntl.bts.gov/view/dot/92942
Hsu, Chengmin and Johnson, Lynn (2008). Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach.

Hsu, Chengmin and Johnson, Lynn "Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach" (2008)

Hsu, Chengmin and Johnson, Lynn "Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach" , 2008
Export RIS Citation Information. TY - Tech Report AU - Hsu, Chengmin AU - Johnson, Lynn A2 - University of Colorado at Denver. Department of Civil Engineering A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - The Colorado Department of Transportation (CDOT) has the challenging task of protecting the environment while developing and maintaining the best transportation systems and services possible for the citizens of Colorado. Among these tasks, a wetland inventory database is a key component required to meet the environmental protection mandate. The subject research project is directed to developing a semi-automated method to identify and classify inland wetlands in the northern Front Range area of Colorado. A goal of the project is to produce a database that accurately records wetland locations based on the classification system that is commonly used by many organizationsand institutions. The methodology is based on satellite imagery, high resolution aerial photos, and digital elevation model data in conjunction with field global positioning system data collections. Satellite imagery being used includes moderate resolution LANDSAT 7 ETM+, Terra ASTER, and EO-1 Hyperion/ALI. The aerial photography is from the National Agriculture Imagery Program and is mainly used for validation and sample collection purposes. The EO-1 imagery has high spectral resolution and is used to develop a wetlands spectrum signature library which is then used to observe the correlations between EO-1 and LANDSAT 7 and ASTER image bands. The image processing approach being applied uses both pixel-based and object-based classification techniques; the object-based technique accounts for the pattern of neighboring pixels and wetland boundary shapes. The variables generated for object-based classification algorithm are extracted from multi-spectral imagery and include image texture, wetland shapes, greenness, wetness, brightness, normalized difference vegetation index, principal components, stream networks, biological soil crust index, and land thermal fluctuation. In the final stage, these variables are incorporated into a hierarchical rule creation for facilitating the wetland classification operation. To complete the tasks, the software used include ArcGIS®, ENVI®, DEFINIENS® Professional. Results of the research indicate a high correspondence with wetlands mapped by field biologists and identification of additional wetlands not previously recognized. AN - dot:92942 ET - Final Report KW - Remote sensing KW - Geographic information systems KW - Global Positioning System KW - Aerial photography KW - Databases KW - Hydrology KW - Image processing KW - Inventory KW - Landsat satellites KW - Wetlands KW - Mapping KW - Environmental protection KW - USACE Wetlands Delineation Manual KW - wetland inventory databases KW - hydrological analysis LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-09-01 SN - CDOT-2008-8 TI - Multi-Criteria Wetlands Mapping Using an Integrated Pixel-Based and Object-Based Classification Approach M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92942 ER - DB - ROSA P
Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction

Mooney, Michael A. ;

Nocks, Christopher S.

2008-10-01 | PDF

The objective of the study was to investigate the efficacy of new devices for quality assurance (QA) of Class 1 backfill in MSE wall and bridge approach earthwork compaction. Extensive testing at two construction sites, an MSE wall project near Golden, CO, and multiple MSE wall/bridge approach projects near Wheat Ridge, CO, revealed that the light ...

08/17/2026

Title : Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction Creator(s) : Mooney, Michael A.;Nocks, Christopher S.;Seldon, Kristi L.;Bee, Geoffrey T.;Senseney, Christopher T.; Corporate Creator(s) : Colorado School of Mines Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-10-01 Report Number : CDOT-2008-11 URL : https://rosap.ntl.bts.gov/view/dot/92941
Mooney, Michael A. et al. (2008). Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction.

Mooney, Michael A. et al. "Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction" (2008)

Mooney, Michael A. et al. "Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction" , 2008
Export RIS Citation Information. TY - Tech Report AU - Mooney, Michael A. AU - Nocks, Christopher S. AU - Seldon, Kristi L. AU - Bee, Geoffrey T. AU - Senseney, Christopher T. A2 - Colorado School of Mines A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of the study was to investigate the efficacy of new devices for quality assurance (QA) of Class 1 backfill in MSE wall and bridge approach earthwork compaction. Extensive testing at two construction sites, an MSE wall project near Golden, CO, and multiple MSE wall/bridge approach projects near Wheat Ridge, CO, revealed that the light weight deflectometer (LWD), dynamic cone penetrometer (DCP), and Clegg Hammer are all capable of assessing the compacted state of Class 1 backfill. Field test data also revealed that the current CDOT practice of single position nuclear gauge (NG) testing is inadequate. An evaluation of field data demonstrated that target values (TVs) exist for the LWD modulus (ELWD), Clegg Impact Value (CIV), and DCP penetration index that could serve as surrogates for the current 95% compaction requirement. The DCP exhibited two key limitations: moisture sensitivity and penetration resistance from placed geogrid (MSE walls) and geofabric (bridge approach). Because the LWD and Clegg Hammer do not possess the same limitations, these two devices were deemed most suitable for QA of MSE wall and bridge approach earth work compaction. AN - dot:92941 ET - Final Report KW - Backfill soils KW - Bridge approaches KW - Cone penetrometers KW - Deflectometers KW - Earth walls KW - Earthwork KW - Field tests KW - Geogrids KW - Geotextiles KW - Mechanically stabilized earth KW - Nuclear gauges KW - Quality assurance KW - Soil compaction KW - Class 1 backfill KW - light weight deflectometers (LWD) KW - Clegg Hammers LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-10-01 SN - CDOT-2008-11 TI - Improving Quality Assurance of MSE Wall and Bridge Approach Earthwork Compaction M3 - Tech Report N1 - United States N1 - 80.24 UR - https://rosap.ntl.bts.gov/view/dot/92941 ER - DB - ROSA P
Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks

Song, Yu (Fred)

;

Freyre, Raul

2026-07-01 | PDF

Truck platooning, a technology where connected and automated trucks travel in closely linked convoys, promises significant reductions in fuel consumption and emissions. However, these long convoys present a major safety hazard on existing roadways, particularly on rural two-lane undivided highways. On these roads, human drivers must use the oncomin ...

08/17/2026

Title : Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks Creator(s) : Song, Yu (Fred);Freyre, Raul;Soe, Zaw Than; Corporate Creator(s) : Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC);North Dakota State University; Corporate Contributor(s) : United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;United States. Department of Transportation. University Transportation Centers (UTC) Program; Published Date : 2026-07-01 Report Number : CTIPS-26-005 URL : https://rosap.ntl.bts.gov/view/dot/92940
Song, Yu (Fred) et al. (2026). Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks.

Song, Yu (Fred) and Freyre, Raul and Soe, Zaw Than "Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks" (2026)

Song, Yu (Fred) et al. "Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks" , 2026
Export RIS Citation Information. TY - Tech Report AU - Song, Yu (Fred) AU - Freyre, Raul AU - Soe, Zaw Than A2 - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) A2 - North Dakota State University A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program AB - Truck platooning, a technology where connected and automated trucks travel in closely linked convoys, promises significant reductions in fuel consumption and emissions. However, these long convoys present a major safety hazard on existing roadways, particularly on rural two-lane undivided highways. On these roads, human drivers must use the oncoming traffic lane to overtake, and a long truck platoon acts as a dangerous and extended barrier. To address this problem, we established a comprehensive framework to safely integrate platoons into mixed traffic. The research progressed through four steps. First, we modeled the precise time and distance required for a human driver to safely pass a platoon. Second, we developed a dynamic algorithm that determines safe platooning limits, such as the maximum number of trucks allowed, based on real-time road geometry and oncoming traffic. Third, we tested these rules using advanced traffic simulations. Finally, we designed an active gap opening control system, allowing automated trucks to proactively split apart and provide a safe harbor for passing vehicles. Our findings demonstrate that while long platoons operate safely on multilane highways, they require strict, dynamic limitations on two-lane roads. This research provides transportation policymakers with a clear, data-driven blueprint. By shifting from rigid rules to context-aware operational rules and utilizing cooperative gap opening technologies, agencies can preserve the economic benefits of truck platooning while rigorously protecting the safety of everyday drivers. AN - dot:92940 ET - Final Report KW - Traffic platooning KW - Infrastructure KW - Rural highways KW - Two lane highways KW - Networks KW - Real time control KW - Control systems KW - Policy KW - Emissions testing KW - Trucks KW - Automated Truck Platooning KW - Highway Infrastructure Compatibility KW - Dynamic Operational Rules KW - Cooperative Gap-Opening Control LA - English PB - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) PY - 2026-07-01 SN - CTIPS-26-005 TI - Improving Compatibility of Truck Platooning With Existing Infrastructure via Development of Dynamic Operational Rules on Highway Networks M3 - Tech Report N1 - United States N1 - 69A3552348308 UR - https://rosap.ntl.bts.gov/view/dot/92940 ER - DB - ROSA P
Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3

Tian, Yongzhe ;

Kulak, Mike

2026-07-01 | PDF

The Federal Aviation Administration (FAA), in partnership with Arconic, Embraer, and National Institute for Aviation Research (NIAR), is assessing emerging metallic structures technologies (EMST) using the FAA's Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility and Structures and Materials Lab. In this collaborative effo ...

08/17/2026

Title : Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3 Creator(s) : Tian, Yongzhe;Kulak, Mike;Zaman, Kamruz;Maciejewski, Kimberly;Rodrigues, Marcelo R. B.;Chaves, Carlos E.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Transport Airplane Directorate Published Date : 2026-07-01 Report Number : DOT/FAA/TC-26/13 DOI : https://doi.org/10.21949/r7a9-hs13
Tian, Yongzhe et al. (2026). Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3. https://doi.org/10.21949/r7a9-hs13

Tian, Yongzhe et al. "Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3" (2026), https://doi.org/10.21949/r7a9-hs13

Tian, Yongzhe et al. "Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3" , 2026, https://doi.org/10.21949/r7a9-hs13
Export RIS Citation Information. TY - Tech Report AU - Tian, Yongzhe AU - Kulak, Mike AU - Zaman, Kamruz AU - Maciejewski, Kimberly AU - Rodrigues, Marcelo R. B. AU - Chaves, Carlos E. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Transport Airplane Directorate AB - The Federal Aviation Administration (FAA), in partnership with Arconic, Embraer, and National Institute for Aviation Research (NIAR), is assessing emerging metallic structures technologies (EMST) using the FAA's Full-Scale Aircraft Structural Test Evaluation and Research (FASTER) facility and Structures and Materials Lab. In this collaborative effort, the research team will collect full-scale fuselage panel test data to assess the damage-tolerance (DT) performance of certain EMST fuselage design concepts and compare the results to the DT performance of fuselage structures constructed from conventional aluminum materials that are available today. Several technologies will be considered, including advanced aluminum-lithium (Al-Li) alloys and selective reinforcement of the structure using fiber metal laminates (FMLs). Data from this study will be used to verify improved weight and structural safety performance of the EMST design concepts as compared to fuselage structures built from conventional aluminum materials. The data will also be used to assess the relevance of existing FAA policies (e.g., regulations and guidance materials) and to inform whether safety standards and guidance materials should be created or revised to provide improved safety beyond that afforded by existing airworthiness standards. Results from the third panel test are summarized and compared with panel 1 and panel 2 in this report and will be compared to future tests on panels containing reinforcement using FML to assess the damage-tolerance performance. AN - dot:92939 DO - https://doi.org/10.21949/r7a9-hs13 ET - Final Report KW - Technological innovations KW - Engineering tolerances KW - Residual strength KW - Finite element method KW - Fuselages KW - FASTER LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-07-01 SN - DOT/FAA/TC-26/13 TI - Assessment of Emerging Metallic Structures Technologies through Test and Analysis of Fuselage Structure: Test Panel 3 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92939 ER - DB - ROSA P
Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete

Ballard, Zachoria J. ;

Caires, William S.

2008-11-01 | PDF

Contractors are finding it difficult to obtain Class F fly ash for concrete paving projects, but CDOT specifications do not currently allow Class N pozzolan to be substituted for Class F fly ash. The purpose of this study was to determine the effectiveness of Class N pozzolan and other pozzolans for mitigating alkali-silica reaction (ASR) and resis ...

08/17/2026

Title : Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete Creator(s) : Ballard, Zachoria J.;Caires, William S.;Peters, Stanley R.; Corporate Creator(s) : J. A. Cesare & Associates, Inc. Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-11-01 Report Number : CDOT-2008-10 URL : https://rosap.ntl.bts.gov/view/dot/92938
Ballard, Zachoria J. et al. (2008). Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete.

Ballard, Zachoria J. and Caires, William S. and Peters, Stanley R. "Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete" (2008)

Ballard, Zachoria J. et al. "Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete" , 2008
Export RIS Citation Information. TY - Tech Report AU - Ballard, Zachoria J. AU - Caires, William S. AU - Peters, Stanley R. A2 - J. A. Cesare & Associates, Inc. A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - Contractors are finding it difficult to obtain Class F fly ash for concrete paving projects, but CDOT specifications do not currently allow Class N pozzolan to be substituted for Class F fly ash. The purpose of this study was to determine the effectiveness of Class N pozzolan and other pozzolans for mitigating alkali-silica reaction (ASR) and resisting sulfate attack. First, a literature review was performed to find research on Class N pozzolan. Second, other state departments of transportation (DOTs) were contacted to determine if Class N pozzolan is used and how it is specified. Third, laboratory tests were conducted to determine the effectiveness of Class N pozzolan and other materials in mitigating ASR when compared to Class F fly ash. Using one source of Class F fly ash, one source of Class N pozzolan, and one source of reactive aggregate (fine and course), the effectiveness of Class N was determined by testing each combination in accordance to Colorado Procedures CP-L 4201 and CP-L 4202. Class N pozzolan was found to be effective in mitigating ASR. Once the effectiveness of Class N and other products tested was determined, further testing on Class D mix design was performed for potential effects on fresh and hardened concrete. Testing included entrained air on plastic concrete, rapid chloride permeability (ASTM C1202-05), and compressive strength at 7, 28, and 56 days. AN - dot:92938 KW - Fly ash KW - Pozzolan KW - Procedures KW - Literature reviews KW - Contractors KW - Traffic mitigation KW - Laboratory tests KW - Permeability KW - Evaluation KW - State departments of transportation KW - Class F fly ash KW - Class N pozzolan KW - metakaolin KW - pozzolanic material LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-11-01 SN - CDOT-2008-10 TI - Alternate Mitigation Materials for Alkali-Silica Reaction (ASR) in Concrete M3 - Tech Report N1 - United States N1 - 16.20 UR - https://rosap.ntl.bts.gov/view/dot/92938 ER - DB - ROSA P
Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs

Klop, Jeremy ;

Guderian, Erik

2008-12-01 | PDF

The objective of this study is to provide a summary of the best practices of state departments of transportation and metropolitan planning organizations (MPOs) throughout the country regarding the linkage between mobility performance measures and resource allocation. The only mobility performance measure currently authorized for the Colorado Depart ...

08/17/2026

Title : Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs Creator(s) : Klop, Jeremy;Guderian, Erik; Corporate Creator(s) : Fehr & Peers Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-12-01 Report Number : CDOT-2008-13 URL : https://rosap.ntl.bts.gov/view/dot/92937
Klop, Jeremy and Guderian, Erik (2008). Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs.

Klop, Jeremy and Guderian, Erik "Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs" (2008)

Klop, Jeremy and Guderian, Erik "Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs" , 2008
Export RIS Citation Information. TY - Tech Report AU - Klop, Jeremy AU - Guderian, Erik A2 - Fehr & Peers A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this study is to provide a summary of the best practices of state departments of transportation and metropolitan planning organizations (MPOs) throughout the country regarding the linkage between mobility performance measures and resource allocation. The only mobility performance measure currently authorized for the Colorado Department of Transportation (CDOT) to denote congestion is volume to capacity (V/C) ratio. Currently, the V/C is used to identify the segments with V/C ratio of .85 and above which are considered congested. AN - dot:92937 ET - Final Report KW - Mobility KW - Benchmarks KW - Best practices KW - Measures of effectiveness KW - Metropolitan planning organizations KW - Policy KW - Resource allocation KW - Return on investment KW - State departments of transportation KW - Strategic planning KW - Surveys KW - Traffic congestion KW - mobility funding KW - transportation investments LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-12-01 SN - CDOT-2008-13 TI - Linking of Mobility Performance Measures to Resource Allocation: Survey of State DOTs and MPOs M3 - Tech Report N1 - United States N1 - 62.30 UR - https://rosap.ntl.bts.gov/view/dot/92937 ER - DB - ROSA P
Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete

Castillo, Alberto

;

Olek, Jan

2026-02-26 | PDF

This study investigated the feasibility of using colloidal nanosilica (nS) as microstructure modifier and polymeric microspheres (MS) as alternative air-entrainment systems for Indiana Department of Transportation (INDOT) bridge deck concrete. These admixtures have gained interest due to their potential to modify the air-void system, enhance freeze ...

08/17/2026

Title : Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete Creator(s) : Castillo, Alberto;Olek, Jan;Velay-Lizancos, Mirian; Corporate Creator(s) : Purdue University. Joint Transportation Research Program Corporate Contributor(s) : Indiana Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-26 Report Number : FHWA/IN/JTRP-2026/13 DOI : https://doi.org/10.5703/1288284318621
Castillo, Alberto et al. (2026). Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete. https://doi.org/10.5703/1288284318621

Castillo, Alberto and Olek, Jan and Velay-Lizancos, Mirian "Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete" (2026), https://doi.org/10.5703/1288284318621

Castillo, Alberto et al. "Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete" , 2026, https://doi.org/10.5703/1288284318621
Export RIS Citation Information. TY - Tech Report AU - Castillo, Alberto AU - Olek, Jan AU - Velay-Lizancos, Mirian A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This study investigated the feasibility of using colloidal nanosilica (nS) as microstructure modifier and polymeric microspheres (MS) as alternative air-entrainment systems for Indiana Department of Transportation (INDOT) bridge deck concrete. These admixtures have gained interest due to their potential to modify the air-void system, enhance freeze-thaw (F/T) resistance, reduce permeability, and improve early-age performance. However, their field applicability depends on understanding their sensitivity to mixture composition, type of batching process, consolidation practices, and water-to-cement (w/c) ratio. The objectives of this research were to: (1) conduct field trials incorporating nS and MS and evaluate both fresh and hardened properties, (2) compare air-void characteristics and F/T performance between field and a companion laboratory mixtures, (3) evaluate the influence of mixing method, compaction effort, and type of batching process on mechanical and durability properties, and (4) quantify the effect of w/c ratio on nS mixtures, including the extent of calcium hydroxide (CH) reduction in paste systems. AN - dot:92936 DO - https://doi.org/10.5703/1288284318621 ET - Final Report KW - Admixtures KW - Air voids KW - Bridge construction KW - Concrete KW - Freeze thaw durability KW - Nanostructured materials KW - Silica KW - Bridge decks KW - Concrete bridges KW - Field tests KW - nanosilica KW - microspheres KW - air-entrainment LA - English PB - Purdue University. Joint Transportation Research Program PY - 2026-02-26 SN - FHWA/IN/JTRP-2026/13 TI - Influence of Nanomaterials-Based Admixtures and Polymeric Microspheres on Entrained Air Void System and Freeze-Thaw (F/T) Resistance of Concrete M3 - Tech Report N1 - United States N1 - SPR-4718 UR - https://rosap.ntl.bts.gov/view/dot/92936 ER - DB - ROSA P
Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief]

Liu, Xiaoyue Cathy

;

Chen, Zhuo

2019-07-01 | PDF

Researchers developed a sampling method utilizing machine learning techniques to suggest the location and frequency of sampling roadway assets. The method strives to choose proper highway segments where the conditions of sampled assets can represent the maintenance performance of the full inventory within the network. To this end, the researchers p ...

08/17/2026

Title : Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief] Creator(s) : Liu, Xiaoyue Cathy;Chen, Zhuo; Corporate Creator(s) : University of Utah. Department of Civil and Environmental Engineering;Mountain-Plains Consortium; 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 19-392 URL : https://rosap.ntl.bts.gov/view/dot/92935
Liu, Xiaoyue Cathy and Chen, Zhuo (2019). Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief].

Liu, Xiaoyue Cathy and Chen, Zhuo "Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief]" (2019)

Liu, Xiaoyue Cathy and Chen, Zhuo "Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief]" , 2019
Export RIS Citation Information. TY - Brief AU - Liu, Xiaoyue Cathy AU - Chen, Zhuo A2 - University of Utah. Department of Civil and Environmental Engineering A2 - 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 - Researchers developed a sampling method utilizing machine learning techniques to suggest the location and frequency of sampling roadway assets. The method strives to choose proper highway segments where the conditions of sampled assets can represent the maintenance performance of the full inventory within the network. To this end, the researchers present a high-dimensional clustering-based stratified sampling (HDCSS) method for roadway asset inspection. The method allows transportation agencies to adjust parameters, such as sample size, inspection frequency, and assets of interest. The HDCSS method integrates asset deterioration prediction, high-dimensional clustering, and locality-sensitive hashing (LSH). The sampling method can also incorporate various features of the asset network, such as asset condition, geographic information, traffic condition, and geometric design, as the information upon which samples can be selected. The method is adaptable to any asset changes, as the sampling process is constantly updated with previous inspection results and maintenance records. AN - dot:92935 ET - Research Brief KW - Algorithms KW - Asset management KW - Cluster analysis KW - Condition surveys KW - Data analysis KW - Highway maintenance KW - Inspection KW - Maintenance management KW - Performance measurement KW - Literature reviews LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC 19-392 TI - Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring (Research Brief] M3 - Brief N1 - United States N1 - 528 UR - https://rosap.ntl.bts.gov/view/dot/92935 ER - DB - ROSA P
Advanced Driver Assistance Systems in Law Enforcement Vehicles

Wooten, Thomas

;

Fisher, Donald L.

2026-08-10 | PDF

Motor vehicle crashes are one of the leading causes of on-duty death for law enforcement (LE) officers, firefighters, and emergency medical service (EMS) personnel. This manuscript examines the potential benefits, limitations, and human factors considerations when implementing advanced driver assistance systems (ADAS) in LE fleets, with additional ...

08/11/2026

Title : Advanced Driver Assistance Systems in Law Enforcement Vehicles Creator(s) : Wooten, Thomas;Fisher, Donald L.;Berg, Ian; Corporate Creator(s) : John A. Volpe National Transportation Systems Center (U.S.) Corporate Contributor(s) : United States. Department of Transportation. Highly Automated Systems Safety Center of Excellence;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-08-10 Report Number : DOT-VNTSC-OST-26-01 URL : https://rosap.ntl.bts.gov/view/dot/92934
Wooten, Thomas et al. (2026). Advanced Driver Assistance Systems in Law Enforcement Vehicles.

Wooten, Thomas and Fisher, Donald L. and Berg, Ian "Advanced Driver Assistance Systems in Law Enforcement Vehicles" (2026)

Wooten, Thomas et al. "Advanced Driver Assistance Systems in Law Enforcement Vehicles" , 2026
Export RIS Citation Information. TY - Tech Report AU - Wooten, Thomas AU - Fisher, Donald L. AU - Berg, Ian A2 - John A. Volpe National Transportation Systems Center (U.S.) A3 - United States. Department of Transportation. Highly Automated Systems Safety Center of Excellence A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Motor vehicle crashes are one of the leading causes of on-duty death for law enforcement (LE) officers, firefighters, and emergency medical service (EMS) personnel. This manuscript examines the potential benefits, limitations, and human factors considerations when implementing advanced driver assistance systems (ADAS) in LE fleets, with additional considerations when incorporating ADAS features in ambulances and fire trucks. We found that ADAS, specifically collision avoidance systems focused on longitudinal control and lateral control, are likely to significantly reduce crash risk in LE vehicles during normal driving scenarios. Conversely, collision avoidance systems may interfere with emergency driving and tactical driving maneuvers when active. Driver-vehicle interfaces for ADAS-equipped emergency vehicles should ideally have adaptive and flexible ADAS features that allow for their selective activation and deactivation based on situational needs. ADAS training for first responders should be multifaceted, including both general and specialized components to encourage accurate mental models. AN - dot:92934 ET - Final Report KW - Advanced driver information systems KW - Human factors KW - Training KW - Law enforcement KW - Fire fighting KW - Emergency medical technicians LA - English PB - John A. Volpe National Transportation Systems Center (U.S.) PY - 2026-08-10 SN - DOT-VNTSC-OST-26-01 TI - Advanced Driver Assistance Systems in Law Enforcement Vehicles M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92934 ER - DB - ROSA P
Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring

Liu, Xiaoyue Cathy

;

Chen, Zhuo

2019-07-01 | PDF

A high-dimensional clustering-based sampling method for roadway asset condition inspection is proposed in this study. The method complements existing literature by selecting sample roadway segments that contain multiple types of assets (e.g., signage, shoulder work, pavement marking, etc.) for the accurate estimation of their respective levels of m ...

08/10/2026

Title : Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring Creator(s) : Liu, Xiaoyue Cathy;Chen, Zhuo; Corporate Creator(s) : University of Utah. Department of Civil and Environmental Engineering;Mountain-Plains Consortium; 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 19-392 URL : https://rosap.ntl.bts.gov/view/dot/92933
Liu, Xiaoyue Cathy and Chen, Zhuo (2019). Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring.

Liu, Xiaoyue Cathy and Chen, Zhuo "Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring" (2019)

Liu, Xiaoyue Cathy and Chen, Zhuo "Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring" , 2019
Export RIS Citation Information. TY - Tech Report AU - Liu, Xiaoyue Cathy AU - Chen, Zhuo A2 - University of Utah. Department of Civil and Environmental Engineering A2 - 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 - A high-dimensional clustering-based sampling method for roadway asset condition inspection is proposed in this study. The method complements existing literature by selecting sample roadway segments that contain multiple types of assets (e.g., signage, shoulder work, pavement marking, etc.) for the accurate estimation of their respective levels of maintenance (LOMs). This is consistent with the standard maintenance procedure, as inspection activities are often conducted on roadway segment basis. The proposed method consists of three components: current condition estimation, similarity matrix construction, and stratification. Current condition estimation predicts assets' "current condition" by considering historical inspection records. Similarity matrix construction represents the core piece of the sampling framework, which employs a locality-sensitive hashing algorithm to define the similarity between segments. The stratification process is implemented with spectral clustering, which assigns segments into clusters based on the similarity matrix. The proposed method outperforms simple random sampling, which is widely used by state agencies, especially under the circumstances where LOM varies greatly across assets. The main highlight of the proposed method is the ability to select sample segments with multiple types of assets that are representative of their respective LOMs of the full inventory, which directly translates into an efficient maintenance activity management. The method is implemented using asset inspection records in the state of Utah from September 2014 to March 2016. It represents a potentially useful tool for agencies to effectively conduct asset inspection, and it can be easily adopted for choosing samples containing multiple features. AN - dot:92933 KW - Algorithms KW - Asset management KW - Cluster analysis KW - Condition surveys KW - Data analysis KW - Highway maintenance KW - Inspection KW - Maintenance management KW - Performance measurement KW - Literature reviews LA - English PB - Upper Great Plains Transportation Institute PY - 2019-07-01 SN - MPC 19-392 TI - Hotspot and Sampling Analysis for Effective Maintenance Management and Performance Monitoring M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92933 ER - DB - ROSA P
Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief]

Chen, Suren ;

Zhou, Yufen

2019-07-01 | PDF

Researchers developed a new analysis formulation that can incorporate the coupled earthquake forces on both the bridge and vehicles, which are expressed as functions of the bridge-traffic coupling matrices and earthquake displacement inputs. The proposed methodology is numerically demonstrated on a prototype long-span bridge and traffic system unde ...

08/10/2026

Title : Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief] Creator(s) : Chen, Suren;Zhou, Yufen; Corporate Creator(s) : Mountain-Plains Consortium;Colorado State University. Department of Civil and Environmental Engineering; 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-19-390 URL : https://rosap.ntl.bts.gov/view/dot/92932
Chen, Suren and Zhou, Yufen (2019). Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief].

Chen, Suren and Zhou, Yufen "Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief]" (2019)

Chen, Suren and Zhou, Yufen "Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief]" , 2019
Export RIS Citation Information. TY - Brief AU - Chen, Suren AU - Zhou, Yufen A2 - Mountain-Plains Consortium A2 - Colorado State University. Department of Civil and Environmental 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 AB - Researchers developed a new analysis formulation that can incorporate the coupled earthquake forces on both the bridge and vehicles, which are expressed as functions of the bridge-traffic coupling matrices and earthquake displacement inputs. The proposed methodology is numerically demonstrated on a prototype long-span bridge and traffic system under spatially varying earthquake excitations. The responses of the bridge and vehicles are predicted when the bridge-traffic system is subjected to earthquake excitations. AN - dot:92932 ET - Research Brief KW - Earthquakes KW - Long span bridges KW - Methodology KW - Numerical analysis KW - Seismology KW - Traffic KW - Vehicle dynamics KW - Earthquake resistant design KW - Earthquake resistant structures LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC-19-390 TI - Interaction Analysis of Long-Span Bridges and Traffic System Subjected to Earthquakes [Research Brief] M3 - Brief N1 - United States N1 - MPC-483 UR - https://rosap.ntl.bts.gov/view/dot/92932 ER - DB - ROSA P
Field Evaluation of High-Performance Cold Mix (HPCM) Products

Arkansas. Department of Transportation. Materials Division and Planning & Research Division

2026-06-01 | PDF

This research project evaluated the field performance of nine High-Performance Cold Mix (HPCM) products from various producers to determine suitability for inclusion on ARDOT's Qualified Products List (QPL). The test section was constructed in September 2024 on Hwy 338 (Sweet Home Cutoff/Dixon Road) in south Little Rock. Nine unique HPCM products, ...

08/10/2026

Title : Field Evaluation of High-Performance Cold Mix (HPCM) Products Corporate Creator(s) : Arkansas. Department of Transportation. Materials Division and Planning & Research Division Published Date : 2026-06-01 Report Number : TRC2402 URL : https://rosap.ntl.bts.gov/view/dot/92931
Arkansas. Department of Transportation. Materials Division and Planning & Research Division (2026). Field Evaluation of High-Performance Cold Mix (HPCM) Products.

Arkansas. Department of Transportation. Materials Division and Planning & Research Division "Field Evaluation of High-Performance Cold Mix (HPCM) Products" (2026)

Arkansas. Department of Transportation. Materials Division and Planning & Research Division "Field Evaluation of High-Performance Cold Mix (HPCM) Products" , 2026
Export RIS Citation Information. TY - Tech Report A2 - Arkansas. Department of Transportation. Materials Division and Planning & Research Division AB - This research project evaluated the field performance of nine High-Performance Cold Mix (HPCM) products from various producers to determine suitability for inclusion on ARDOT's Qualified Products List (QPL). The test section was constructed in September 2024 on Hwy 338 (Sweet Home Cutoff/Dixon Road) in south Little Rock. Nine unique HPCM products, both bagged and plant-produced, were installed in simulated potholes and monitored over 12 months. Monthly inspections assessed durability, compaction retention, rutting, and adhesion performance. All nine products demonstrated satisfactory performance with minimal degradation through one full freeze-thaw cycle and a summer season. Based on the results, all tested products were approved for inclusion on the Department's QPL for HPCM. The research also established evaluation criteria for future product submissions, enabling ARDOT to adopt HPCM materials into maintenance and construction projects without requiring individual project-based approvals. AN - dot:92931 ET - Final Report KW - Cold mix paving mixtures KW - Field tests KW - Freeze thaw tests KW - Materials KW - Potholes LA - English PB - Arkansas. Department of Transportation PY - 2026-06-01 SN - TRC2402 TI - Field Evaluation of High-Performance Cold Mix (HPCM) Products M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92931 ER - DB - ROSA P
Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum]

Hartmann, Joseph

2015-10-27 | Memoranda & Guidance: Information | PDF

The National Tunnel Inspection Standards (NTIS) were published on July 13, 2015 and became effective on August 12, 2015. The regulation is part of a larger effort to implement a national tunnel inspection program for highway tunnels similar to the well-established program for highway bridges. The Office of Bridges and Structures has previously host ...

08/10/2026

Title : Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum] Creator(s) : Hartmann, Joseph Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2015-10-27 Series : Memoranda & Guidance: Information URL : https://rosap.ntl.bts.gov/view/dot/92930
Hartmann, Joseph (2015). Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum].

Hartmann, Joseph "Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum]" (2015)

Hartmann, Joseph "Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum]" , 2015
Export RIS Citation Information. TY - Memorandum AU - Hartmann, Joseph A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - The National Tunnel Inspection Standards (NTIS) were published on July 13, 2015 and became effective on August 12, 2015. The regulation is part of a larger effort to implement a national tunnel inspection program for highway tunnels similar to the well-established program for highway bridges. The Office of Bridges and Structures has previously hosted webinars to share details in the regulation and the implementation timeline. Some State transportation departments and Federal agencies asked questions and express concerns during the webinars and afterwards. Several questions have centered on the definition of a tunnel and which types of structures are subject to the NTIS. This memo provides further guidance on different structure types that are or are not subject to the NTIS and can be used to guide efforts to inventory all highway tunnels by December 11, 2015 as required by the regulation. Guidance on how State transportation departments, federal agencies, and tribal governments should submit their preliminary inventory data will follow soon. AN - dot:92930 KW - Policy KW - Recommendations KW - Tunnels KW - Inspection KW - Vehicular tunnels KW - Inventory LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2015-10-27 T2 - Memoranda & Guidance: Information TI - Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) [Memorandum] M3 - Memorandum N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92930 ER - DB - ROSA P
Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026

United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information

2026-08-05 | Special Issue - Weekly Motor Fuel Report | PDF

The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration ...

08/10/2026

Title : Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026 Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Published Date : 2026-08-05 Series : Special Issue - Weekly Motor Fuel Report URL : https://rosap.ntl.bts.gov/view/dot/92929
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2026). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026.

United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026" (2026)

United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026" , 2026
Export RIS Citation Information. TY - Statistical Report A2 - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information AB - The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration (EIA) website. The EIA publishes the average daily amount of gasoline supplied in barrels, which HPPI converts to an average number of gallons of gasoline per week. AN - dot:92929 KW - Fuel consumption KW - Gasoline KW - Supply KW - Traffic volume KW - Data collection KW - Data analysis LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information PY - 2026-08-05 T2 - Special Issue - Weekly Motor Fuel Report TI - Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 44, Data Complete Through 7/31/2026 M3 - Statistical Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92929 ER - DB - ROSA P
Methodology for Load Rating Double-Tee Bridges [Research Brief]

Tazarv, Mostafa

;

Seo, Junwon

2019-07-01 | PDF

Quantitative definitions were proposed to identify all damage types and condition states specific to South Dakota double-tee bridges. Subsequently more than 370 inspection reports were reviewed to determine the frequency of damage types and condition states, bridge span length, bridge number of spans, girder depth, and bridge skew conditions. The s ...

08/10/2026

Title : Methodology for Load Rating Double-Tee Bridges [Research Brief] Creator(s) : Tazarv, Mostafa;Seo, Junwon;Wehbe, Nadim;Rimal, Sandip;Kidd, Brian; Corporate Creator(s) : South Dakota State University. Department of Civil and Environmental Engineering;Upper Great Plains Transportation Institute; 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-19-389 URL : https://rosap.ntl.bts.gov/view/dot/92928
Tazarv, Mostafa et al. (2019). Methodology for Load Rating Double-Tee Bridges [Research Brief].

Tazarv, Mostafa et al. "Methodology for Load Rating Double-Tee Bridges [Research Brief]" (2019)

Tazarv, Mostafa et al. "Methodology for Load Rating Double-Tee Bridges [Research Brief]" , 2019
Export RIS Citation Information. TY - Brief AU - Tazarv, Mostafa AU - Seo, Junwon AU - Wehbe, Nadim AU - Rimal, Sandip AU - Kidd, Brian A2 - South Dakota State University. Department of Civil and Environmental Engineering A2 - Upper Great Plains Transportation Institute 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 - Quantitative definitions were proposed to identify all damage types and condition states specific to South Dakota double-tee bridges. Subsequently more than 370 inspection reports were reviewed to determine the frequency of damage types and condition states, bridge span length, bridge number of spans, girder depth, and bridge skew conditions. The statistical database was then used to identify bridge candidates for field and strength testing. Ten double-tee bridges were identified as suitable for field testing and two bridges were selected for field testing. Girder distribution factors (GDFs) and dynamic load allowance (IM) were measured during the field testing of the two bridges. To verify the available moment and shear capacity estimation methods, two 45-year old double-tee girders, one 50-ft (15.24-m) long and another 30-ft (9.14-m) long were extracted from a bridge located on Nemo Road, SD, and were strength tested at the Lohr Structures Laboratory at South Dakota State University. A four-point loading configuration was selected for the strength testing. The measured data was used to validate the capacity estimation methods. Subsequently, the verified methods were utilized to calculate the shear and moment capacities of all 23 different double-tee sections, which have been used in South Dakota. AN - dot:92928 ET - Research Brief KW - Condition surveys KW - Field tests KW - Girder bridges KW - Inspection KW - Live loads KW - Load and resistance factor design KW - Load factor KW - Methodology KW - Precast concrete KW - Prestressed concrete KW - Prestressed concrete bridges KW - Shear strength KW - Statistical analysis KW - Shear capacity KW - Double-tee bridges LA - English PB - Mountain-Plains Consortium PY - 2019-07-01 SN - MPC-19-389 TI - Methodology for Load Rating Double-Tee Bridges [Research Brief] M3 - Brief N1 - United States N1 - MPC-523 UR - https://rosap.ntl.bts.gov/view/dot/92928 ER - DB - ROSA P

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