Recent Additions

This page includes the documents that were newly added to the repository within the last 30 days.

All these words:

This exact word or phrase:

Any of these words:

None of these words:

Language:

Visit our Help Page for additional assistance

Select a Range:

Select a Format:

Custom Search Builder:

Custom Search Box

Visit our Help Page for additional assistance

Showing 321 - 340 of 527 results

PCCP Texturing Methods Project IR (CX) 070 - 4 (153)

Ardani, Ahmad ;

Outcalt, William (Skip)

1995-02-01 | PDF

This report describes the testing, and construction details of nine test sections with varying textural characteristics. The impacts of various surface textures (sawed vs. tined, longitudinal vs. transverse, and random vs. uniform spacing) on the frictional and noise characteristics of pavement surface were examined. Skid numbers were acquired acco ...

10/05/2026

Title : PCCP Texturing Methods Project IR (CX) 070 - 4 (153) Creator(s) : Ardani, Ahmad;Outcalt, William (Skip); Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-02-01 Report Number : CDOT-DTD-R-95-2 URL : https://rosap.ntl.bts.gov/view/dot/93734
Ardani, A., & Outcalt, W. (. (1995). PCCP Texturing Methods Project IR (CX) 070 - 4 (153) (Report No. CDOT-DTD-R-95-2). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93734

Ardani, Ahmad and William (Skip) Outcalt. PCCP Texturing Methods Project IR (CX) 070 - 4 (153). Report no. CDOT-DTD-R-95-2. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93734.

Ardani, Ahmad, and William (Skip) Outcalt PCCP Texturing Methods Project IR (CX) 070 - 4 (153). Colorado. Department of Transportation, 1995, Report no. CDOT-DTD-R-95-2, ROSA P. https://rosap.ntl.bts.gov/view/dot/93734.
Export RIS Citation Information. TY - Tech Report AU - Ardani, Ahmad AU - Outcalt, William (Skip) A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report describes the testing, and construction details of nine test sections with varying textural characteristics. The impacts of various surface textures (sawed vs. tined, longitudinal vs. transverse, and random vs. uniform spacing) on the frictional and noise characteristics of pavement surface were examined. Skid numbers were acquired according to ASTM E 274 procedure with ribbed-and smooth.-tire (ASTM E 501, and 524) at 40, 50, and 65 mph for all the test sections. Six different types of texture measuring devices were used to measure and compare the amount of texture in each of the test sections. To examine the noise properties of the test sections, noise data were acquired in three different locations: inside of the test vehicle, 25 feet from the center line, and near the right rear tire of the test vehicle away from the exhaust pipe. AN - dot:93734 DA - 1995-02-01 ET - Interim Report KW - Surface texture tests KW - Concrete pavements KW - Construction equipment KW - Data collection KW - Friction tests KW - Measuring instruments KW - Noise KW - Pavement surface course KW - Skid resistance tests KW - Texture KW - Test sections KW - skid number KW - ribbed smooth-tire KW - noise level LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DTD-R-95-2 TI - PCCP Texturing Methods Project IR (CX) 070 - 4 (153) M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93734 ER -
Keyway Curb Construction Report

Outcalt, William (Skip)

1995-02-01 | PDF

This report describes the procedures, problems, and costs of installation of a keyway type curb. Cost effectiveness of keyway curbs will be evaluated during this study by tracking the performance, durability, and cost of maintaining a section of curb that was installed on US, 24 in Colorado Springs.

10/05/2026

Title : Keyway Curb Construction Report Creator(s) : Outcalt, William (Skip) Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-02-01 Report Number : CDOT-DID-R-95-3;File 96.00 1571P; URL : https://rosap.ntl.bts.gov/view/dot/93733
Outcalt, W. (. (1995). Keyway Curb Construction Report (Report No. CDOT-DID-R-95-3). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93733

Outcalt, William (Skip). Keyway Curb Construction Report. Report no. CDOT-DID-R-95-3. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93733.

Outcalt, William (Skip) Keyway Curb Construction Report. Colorado. Department of Transportation, 1995, Report no. CDOT-DID-R-95-3, ROSA P. https://rosap.ntl.bts.gov/view/dot/93733.
Export RIS Citation Information. TY - Tech Report AU - Outcalt, William (Skip) A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report describes the procedures, problems, and costs of installation of a keyway type curb. Cost effectiveness of keyway curbs will be evaluated during this study by tracking the performance, durability, and cost of maintaining a section of curb that was installed on US, 24 in Colorado Springs. AN - dot:93733 DA - 1995-02-01 KW - Curbs KW - Concrete KW - Construction management KW - Cost effectiveness KW - Costs KW - Durability KW - Performance KW - Slip form paving LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DID-R-95-3 TI - Keyway Curb Construction Report M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93733 ER -
Environmentally Sensitive Sanding and Deicing Practices

Chang, Nien-Yin ;

Pearson, Walter H.

1995-03-01 | PDF

Growth in the Denver-metro area has led to an increased impact on the environment due to winter maintenance activities. According to the Regional Air Quality Council, the use of sand as a traction aid contributes up to 45 % of the particulate air pollution (PM10) in the Denver area. The Environmentally Sensitive Sanding and Deicing Practices at the ...

10/05/2026

Title : Environmentally Sensitive Sanding and Deicing Practices Creator(s) : Chang, Nien-Yin;Pearson, Walter H.;Chang, James L. J.;Gross, A. J;Meyer, Mark;Jolly, Marva;Yang, Barbara;Samour, Hellen; Corporate Creator(s) : University of Colorado at Denver. Department of Civil Engineering;Colorado Transportation Institute; Corporate Contributor(s) : Colorado. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1995-03-01 Report Number : CDOT-CTI-95-5 URL : https://rosap.ntl.bts.gov/view/dot/93732
Chang, N. Y., Pearson, W. H., Chang, J. L. J., Gross, A. J., Meyer, M., Jolly, M., Yang, B., & Samour, H. (1995). Environmentally Sensitive Sanding and Deicing Practices (Report No. CDOT-CTI-95-5). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93732

Chang, Nien-Yin, Walter H. Pearson, James L. J. Chang, A. J Gross, Mark Meyer, Marva Jolly, Barbara Yang, and Hellen Samour. Environmentally Sensitive Sanding and Deicing Practices. Report no. CDOT-CTI-95-5. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93732.

Chang, Nien-Yin, et al. Environmentally Sensitive Sanding and Deicing Practices. Colorado. Department of Transportation, 1995, Report no. CDOT-CTI-95-5, ROSA P. https://rosap.ntl.bts.gov/view/dot/93732.
Export RIS Citation Information. TY - Tech Report AU - Chang, Nien-Yin AU - Pearson, Walter H. AU - Chang, James L. J. AU - Gross, A. J AU - Meyer, Mark AU - Jolly, Marva AU - Yang, Barbara AU - Samour, Hellen A2 - University of Colorado at Denver. Department of Civil Engineering A2 - Colorado Transportation Institute A3 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Growth in the Denver-metro area has led to an increased impact on the environment due to winter maintenance activities. According to the Regional Air Quality Council, the use of sand as a traction aid contributes up to 45 % of the particulate air pollution (PM10) in the Denver area. The Environmentally Sensitive Sanding and Deicing Practices at the University of Colorado at Denver investigated literature and current practices from a wide variety of sources to arrive at a document which summarizes the current state of knowledge about deicing practices and their effect on human health and the environment. Topics include, properties of snow and ice, roadway traction, anti-skid materials, air quality impacts of anti-skid materials, water quality impacts of deicing chemicals, deicing chemicals, equipment to apply deicers, snow and ice management practices, and current practices obtained from interviews and site visits. Topics for further research are also discussed. AN - dot:93732 DA - 1995-03-01 ET - Final Report: 9/93 to 12/94 KW - Deicing chemicals KW - Snow and ice control KW - Salts KW - Water quality KW - Air quality KW - Environmental impacts KW - Literature reviews LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-CTI-95-5 TI - Environmentally Sensitive Sanding and Deicing Practices M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93732 ER -
Visual Guidance Automation - Technology Assessment Report

Bagot, Keith

1995-04-01 | PDF

This report provides an assessment of current devices and technologies which may be applicable to the navigation and control of aircraft and service support vehicles on the airport surface traffic management area. The areas investigated included object sensing systems, object location and detection systems, visual aids, communication and control sy ...

10/05/2026

Title : Visual Guidance Automation - Technology Assessment Report Creator(s) : Bagot, Keith Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1995-04-01 Report Number : DOT/FAA/CT-95/3 URL : https://rosap.ntl.bts.gov/view/dot/93731
Bagot, K. (1995). Visual Guidance Automation - Technology Assessment Report (Report No. DOT/FAA/CT-95/3). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93731

Bagot, Keith. Visual Guidance Automation - Technology Assessment Report. Report no. DOT/FAA/CT-95/3. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1995. https://rosap.ntl.bts.gov/view/dot/93731.

Bagot, Keith Visual Guidance Automation - Technology Assessment Report. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1995, Report no. DOT/FAA/CT-95/3, ROSA P. https://rosap.ntl.bts.gov/view/dot/93731.
Export RIS Citation Information. TY - Tech Report AU - Bagot, Keith A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report provides an assessment of current devices and technologies which may be applicable to the navigation and control of aircraft and service support vehicles on the airport surface traffic management area. The areas investigated included object sensing systems, object location and detection systems, visual aids, communication and control systems, and human factors facilities. The components, devices, or systems in each area were rated based on the maturity, applicability, compatibility, and risk as related to the FAA mission of airport surface control. A major finding of this assessment was that although there are many devices used in commercial vehicular traffic control systems and in industrial process control systems, the application of these devices to the FAA mission is restricted by the large signal range needed for object detection for airports in all types of weather and visibility conditions. AN - dot:93731 DA - 1995-04-01 ET - Final Report KW - Ground transportation KW - Air transportation KW - Air traffic control KW - Object detection KW - Detection and identification systems KW - Visual aids LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1995 SN - DOT/FAA/CT-95/3 TI - Visual Guidance Automation - Technology Assessment Report M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93731 ER -
The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports

Matos, Rene A ;

Sacket, John R

1986-08-01 | PDF

An Automated Weather Observing System (AWOS) was installed at the Federal Aviation Administration (FAA) Technical Center's Interim Concept Development Heliport. This was done in order to evaluate the siting, installation, and operational suitability of the AWOS at a heliport. The principal recommendations of this report have been incorporated in FA ...

10/05/2026

Title : The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports Creator(s) : Matos, Rene A;Sacket, John R;Shuster, Philip;Weiss, Rosanne M; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1986-08-01 Report Number : DOT/FAA/PM-86-30;DOT/FAA/CT-86/9; URL : https://rosap.ntl.bts.gov/view/dot/93730
Matos, R. A., Sacket, J. R., Shuster, P., & Weiss, R. M. (1986). The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports (Report No. DOT/FAA/PM-86-30). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93730

Matos, Rene A, John R Sacket, Philip Shuster, and Rosanne M Weiss. The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports. Report no. DOT/FAA/PM-86-30. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1986. https://rosap.ntl.bts.gov/view/dot/93730.

Matos, Rene A, et al. The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1986, Report no. DOT/FAA/PM-86-30, ROSA P. https://rosap.ntl.bts.gov/view/dot/93730.
Export RIS Citation Information. TY - Tech Report AU - Matos, Rene A AU - Sacket, John R AU - Shuster, Philip AU - Weiss, Rosanne M A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - An Automated Weather Observing System (AWOS) was installed at the Federal Aviation Administration (FAA) Technical Center's Interim Concept Development Heliport. This was done in order to evaluate the siting, installation, and operational suitability of the AWOS at a heliport. The principal recommendations of this report have been incorporated in FAA Advisory Circular (AC) 150/5220-16, Automated Weather Observing Systems (AWOS) for Non-Federal applications. AN - dot:93730 DA - 1986-08-01 ET - Final Report KW - Aeronautics KW - Heliports KW - Meteorology KW - Weather forecasting LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1986 SN - DOT/FAA/PM-86-30 TI - The Siting, Installation, and Operational Suitability of the Automated Weather Observing System (AWOS) at Heliports M3 - Tech Report N1 - United States N1 - T0705A DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93730 ER -
Biodynamics Response for the Evaluation of Aircraft Crash Safety

Lankarani, Hamid M.

1993-09-01 | PDF

A comprehensive study of the capabilities of the program SOM-LA/TA (Seat Occupant Model -Light Aircraft/Transport Aircraft) has been performed and deficiencies of its occupant models have been identified. For the prediction of occupant head injuries, formulations and mechanisms of head injury have been evaluated. Head-Injury-Criteria (HIC) from ana ...

10/05/2026

Title : Biodynamics Response for the Evaluation of Aircraft Crash Safety Creator(s) : Lankarani, Hamid M. Corporate Creator(s) : National Institute for Aviation Research (U.S.);Wichita State University; Published Date : 1993-09-01 Report Number : DOT/FAA/CT-03-90-C-00044 URL : https://rosap.ntl.bts.gov/view/dot/93729
Lankarani, H. M. (1993). Biodynamics Response for the Evaluation of Aircraft Crash Safety (Report No. DOT/FAA/CT-03-90-C-00044). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93729

Lankarani, Hamid M.. Biodynamics Response for the Evaluation of Aircraft Crash Safety. Report no. DOT/FAA/CT-03-90-C-00044. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1993. https://rosap.ntl.bts.gov/view/dot/93729.

Lankarani, Hamid M. Biodynamics Response for the Evaluation of Aircraft Crash Safety. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1993, Report no. DOT/FAA/CT-03-90-C-00044, ROSA P. https://rosap.ntl.bts.gov/view/dot/93729.
Export RIS Citation Information. TY - Tech Report AU - Lankarani, Hamid M. A2 - National Institute for Aviation Research (U.S.) A2 - Wichita State University AB - A comprehensive study of the capabilities of the program SOM-LA/TA (Seat Occupant Model -Light Aircraft/Transport Aircraft) has been performed and deficiencies of its occupant models have been identified. For the prediction of occupant head injuries, formulations and mechanisms of head injury have been evaluated. Head-Injury-Criteria (HIC) from analysis codes and experiments have been computed and compared. Feasibility and detailed designs of a simple non-sled HIC-measuring test mechanism have been accomplished and issues regarding the construction of test facility has been discussed. AN - dot:93729 DA - 1993-09-01 KW - Biodynamics KW - Crash injury research KW - Aircraft crash victims LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1993 SN - DOT/FAA/CT-03-90-C-00044 TI - Biodynamics Response for the Evaluation of Aircraft Crash Safety M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93729 ER -
A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary]

Kulesza, Stacey E. ;

Chavez, Wilson F. Espinoza

2026-09-01 | PDF

The primary objective of this research was to measure the erosion potential of Kansas shales at the surface and near the surface at a relatively shallow depth (2-3 ft). Considering the relationship between shale porosity and erodibility, this research also investigated the role of freeze-thaw cycles on shale porosity to predict a timeline of increa ...

10/05/2026

Title : A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary] Creator(s) : Kulesza, Stacey E.;Chavez, Wilson F. Espinoza;Barman, Konica;Castillo, Rodolfo; Corporate Creator(s) : Texas State University--San Marcos Corporate Contributor(s) : Texas Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Contributor(s) : Hutchinson, Stacy Published Date : 2026-09-01 Report Number : K-TRAN: KSU-22-8 URL : https://rosap.ntl.bts.gov/view/dot/93728
Kulesza, S. E., Chavez, W. F. E., Barman, K., & Castillo, R. (2026). A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary] (Report No. K-TRAN: KSU-22-8). Kansas. Department of Transportation. Bureau of Materials and Research. https://rosap.ntl.bts.gov/view/dot/93728

Kulesza, Stacey E., Wilson F. Espinoza Chavez, Konica Barman, and Rodolfo Castillo. A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary]. Report no. K-TRAN: KSU-22-8. Kansas. Department of Transportation. Bureau of Materials and Research, 2026. https://rosap.ntl.bts.gov/view/dot/93728.

Kulesza, Stacey E., et al. A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary]. Kansas. Department of Transportation. Bureau of Materials and Research, 2026, Report no. K-TRAN: KSU-22-8, ROSA P. https://rosap.ntl.bts.gov/view/dot/93728.
Export RIS Citation Information. TY - Brief AU - Kulesza, Stacey E. AU - Chavez, Wilson F. Espinoza AU - Barman, Konica AU - Castillo, Rodolfo A2 - Texas State University--San Marcos A3 - Texas Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The primary objective of this research was to measure the erosion potential of Kansas shales at the surface and near the surface at a relatively shallow depth (2-3 ft). Considering the relationship between shale porosity and erodibility, this research also investigated the role of freeze-thaw cycles on shale porosity to predict a timeline of increasing shale erodibility by observing the influence of ambient air freeze-thaw cycles on porosity and pore structure change in shale. Understanding the factors that influence shale erosion is essential for effective asset management and implementation of best practices to prevent or minimize shale erosion. Additional research could result in more comprehensive knowledge of how freeze-thaw cycles and changes in pore structure interact and contribute to shale erosion, leading to more effective preventive measures. A brief literature review of shale erosion and relevant measurements to this research follows this introduction. A detailed methods section covers all standard and newly developed approaches to meet the objectives of this study, and the results and discussion sections offer insights into the findings. The report ends with conclusions and recommendations for implementation. AN - dot:93728 DA - 2026-09-01 ET - Technical Summary KW - Shale KW - Erosion KW - Porosity KW - Geomaterials KW - Slopes KW - Permeability coefficient KW - Environmental protection KW - Decision making LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026 SN - K-TRAN: KSU-22-8 TI - A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary] M3 - Brief N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93728 ER -
A Study of Intermediate Geomaterials and Highly Erodible Rock

Kulesza, Stacey E. ;

Chavez, Wilson F. Espinoza

2026-09-01 | PDF

Although substantial research on soil erodibility has recently been conducted at the federal (e.g., NCHRP 915) and state (e.g., K-TRAN: KSU-15-4; K-TRAN: KSU-18-5) levels, information regarding erosion characteristics of rock or intermediate geomaterials, such as shale, is extremely limited. Shale exposure on cut slopes or natural slopes leads to p ...

10/05/2026

Title : A Study of Intermediate Geomaterials and Highly Erodible Rock Creator(s) : Kulesza, Stacey E.;Chavez, Wilson F. Espinoza;Barman, Konica;Castillo, Rodolfo; Corporate Creator(s) : Kansas State University Transportation Center. Department of Civil Engineering;Texas State University--San Marcos; Corporate Contributor(s) : Texas Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-09-01 Report Number : K-TRAN: KSU-22-8 URL : https://rosap.ntl.bts.gov/view/dot/93727
Kulesza, S. E., Chavez, W. F. E., Barman, K., & Castillo, R. (2026). A Study of Intermediate Geomaterials and Highly Erodible Rock (Report No. K-TRAN: KSU-22-8). Kansas. Department of Transportation. Bureau of Materials and Research. https://rosap.ntl.bts.gov/view/dot/93727

Kulesza, Stacey E., Wilson F. Espinoza Chavez, Konica Barman, and Rodolfo Castillo. A Study of Intermediate Geomaterials and Highly Erodible Rock. Report no. K-TRAN: KSU-22-8. Kansas. Department of Transportation. Bureau of Materials and Research, 2026. https://rosap.ntl.bts.gov/view/dot/93727.

Kulesza, Stacey E., et al. A Study of Intermediate Geomaterials and Highly Erodible Rock. Kansas. Department of Transportation. Bureau of Materials and Research, 2026, Report no. K-TRAN: KSU-22-8, ROSA P. https://rosap.ntl.bts.gov/view/dot/93727.
Export RIS Citation Information. TY - Tech Report AU - Kulesza, Stacey E. AU - Chavez, Wilson F. Espinoza AU - Barman, Konica AU - Castillo, Rodolfo A2 - Kansas State University Transportation Center. Department of Civil Engineering A2 - Texas State University--San Marcos A3 - Texas Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Although substantial research on soil erodibility has recently been conducted at the federal (e.g., NCHRP 915) and state (e.g., K-TRAN: KSU-15-4; K-TRAN: KSU-18-5) levels, information regarding erosion characteristics of rock or intermediate geomaterials, such as shale, is extremely limited. Shale exposure on cut slopes or natural slopes leads to potential erosion. The objective of this research was to measure the erodibility of Kansas shales, specifically loose, weathered material collected from the surface of cut slopes and the denser, intact specimens below. Because erosion characteristics differ significantly, this study also developed a simple method to predict the time over which shale transitions from not erodible to highly erodible. Samples were collected from five sites that had exposed shale on a cut slope, and the loose material at the top of a Shelby tube was reconstituted for erosion testing and constant head testing to determine hydraulic conductivity. The dense, intact material was tested in the Shelby tube without extrusion for erosion testing and hydraulic conductivity via the falling head permeability test. Falling head tests were performed before and after exposure to controlled freeze-thaw conditions to evaluate changes in permeability and subsequent porosity under Kansas-like environmental conditions-key indicators of erosion potential in shale. An empirical model was also developed to predict the number of freeze-thaw cycles needed for non-erodible intact shales to transform into highly erodible weathered material. The Kansas Department of Transportation could use this thorough analysis to improve decision-making and effective erosion mitigation strategies in similar geological settings. Results of this study also enhance understanding of shale erosion processes, with practical implications for infrastructure safety and environmental protection. AN - dot:93727 DA - 2026-09-01 ET - Final Report: July 2021 - December 2023 KW - Shale KW - Erosion KW - Porosity KW - Geomaterials KW - Slopes KW - Permeability coefficient KW - Environmental protection KW - Decision making LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026 SN - K-TRAN: KSU-22-8 TI - A Study of Intermediate Geomaterials and Highly Erodible Rock M3 - Tech Report N1 - United States N1 - C2188 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93727 ER -
Demonstration of the Placement of Stone Matrix Asphalt in Colorado

Harmelink, Donna ;

Aschenbrener, Tim

1995-03-01 | PDF

The Stone Matrix Asphalt (SMA) experimental feature on SH-119, from SH-52 East to Longmont, is the Colorado Department of Transportation's (CDOT's) first attempt under contract to construct test sections for evaluation. The project successfully demonstrated the design, production, and placement of the European SMA. The research experiment on the pr ...

10/05/2026

Title : Demonstration of the Placement of Stone Matrix Asphalt in Colorado Creator(s) : Harmelink, Donna;Aschenbrener, Tim;Wood, Kenneth; Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-03-01 Report Number : CDOT-DTD-R-95-1 URL : https://rosap.ntl.bts.gov/view/dot/93726
Harmelink, D., Aschenbrener, T., & Wood, K. (1995). Demonstration of the Placement of Stone Matrix Asphalt in Colorado (Report No. CDOT-DTD-R-95-1). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93726

Harmelink, Donna, Tim Aschenbrener, and Kenneth Wood. Demonstration of the Placement of Stone Matrix Asphalt in Colorado. Report no. CDOT-DTD-R-95-1. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93726.

Harmelink, Donna, et al. Demonstration of the Placement of Stone Matrix Asphalt in Colorado. Colorado. Department of Transportation, 1995, Report no. CDOT-DTD-R-95-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/93726.
Export RIS Citation Information. TY - Tech Report AU - Harmelink, Donna AU - Aschenbrener, Tim AU - Wood, Kenneth A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Stone Matrix Asphalt (SMA) experimental feature on SH-119, from SH-52 East to Longmont, is the Colorado Department of Transportation's (CDOT's) first attempt under contract to construct test sections for evaluation. The project successfully demonstrated the design, production, and placement of the European SMA. The research experiment on the project consisted of placing 11,000 tons (9,979,200 kg) of SMA using three different mix designs (two polymer stabilized mixtures and one fiber mixture). The two polymers were 1) Vestoplast S from Huls America and 2) PM-ID from Koch Materials Co. The fiber mixture used a cellulose fiber in pellet form from Arbocel. The material specifications used for the design of the SMA were adequate with a few exceptions. Several plant modifications were required to add the mineral filler and additives. Production through the plant was reduced significantly because of the addition of mineral filler. The rate of production was virtually cut in half from the normally expected 250 tons (226,800 kg) per hour to 150 tons (136,080 kg) per hour. Field performance data will be evaluated on an annual basis. Results will be available in approximately 3 years. Based on the European torture tests, it is expected that the SMAs will have very good field performance with respect to rutting and moisture damage. AN - dot:93726 DA - 1995-03-01 ET - Interim Report KW - Stone matrix asphalt KW - Polymer asphalt KW - Fibers KW - Additives KW - Cellulose KW - Fiber reinforced concrete KW - Materials KW - Mix design KW - Paving KW - Polymers KW - Productivity KW - Specifications KW - Test sections LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DTD-R-95-1 TI - Demonstration of the Placement of Stone Matrix Asphalt in Colorado M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93726 ER -
Resilient Modulus of Granular Soils With Fines Contents

Chang, Nien-Yin ;

Chiang, Hsien-Hsiang

1995-04-01 | PDF

This study examined the relationship of resilient modulus with the stabilometer R-values, and with the index properties of Colorado soils. A total of 39 resilient modulus tests were conducted, 20 in this test program and 19 in an earlier test program. Soil types ranged from A-I-a to A-7-6 with varying amounts of fines. Regression analyses were perf ...

10/05/2026

Title : Resilient Modulus of Granular Soils With Fines Contents Creator(s) : Chang, Nien-Yin;Chiang, Hsien-Hsiang;Jiang, Lieu-Ching; Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-04-01 Report Number : CDOT-DTD-R-95-9 URL : https://rosap.ntl.bts.gov/view/dot/93725
Chang, N. Y., Chiang, H. H., & Jiang, L. C. (1995). Resilient Modulus of Granular Soils With Fines Contents (Report No. CDOT-DTD-R-95-9). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93725

Chang, Nien-Yin, Hsien-Hsiang Chiang, and Lieu-Ching Jiang. Resilient Modulus of Granular Soils With Fines Contents. Report no. CDOT-DTD-R-95-9. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93725.

Chang, Nien-Yin, et al. Resilient Modulus of Granular Soils With Fines Contents. Colorado. Department of Transportation, 1995, Report no. CDOT-DTD-R-95-9, ROSA P. https://rosap.ntl.bts.gov/view/dot/93725.
Export RIS Citation Information. TY - Tech Report AU - Chang, Nien-Yin AU - Chiang, Hsien-Hsiang AU - Jiang, Lieu-Ching A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This study examined the relationship of resilient modulus with the stabilometer R-values, and with the index properties of Colorado soils. A total of 39 resilient modulus tests were conducted, 20 in this test program and 19 in an earlier test program. Soil types ranged from A-I-a to A-7-6 with varying amounts of fines. Regression analyses were performed to formulate the functional relationship using the least square fit. Two regression equations were formulated to relate resilient modulus to R-value (one linear and one nonlinear), and four linear regression equations to relate resilient modulus to percent fines content, plasticity index, uniformity coefficient, and mean grain size. In general, the values of the Correlation coefficients are small and care should be taken when using these equations, particularly for granular soil samples with less than 30% of fines. AN - dot:93725 DA - 1995-04-01 ET - Final Report KW - Equations KW - Fine materials KW - Grain size KW - Granular soils KW - Modulus of resilience KW - Plasticity index KW - Regression analysis KW - Standardization KW - Correlation analysis KW - R-value KW - Index properties LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DTD-R-95-9 TI - Resilient Modulus of Granular Soils With Fines Contents M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93725 ER -
A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994

Aschenbrener, Tim

1995-06-01 | PDF

In 1994 there were significant changes to the Colorado Department of Transportation's (CDOT's) both mix asphalt program. Several programs culminated at this time. These programs included 1) aggregate and mix specifications, 2) variable laboratory compactive efforts, 3) field verification, and 4) European testing equipment. Furthermore, the use of t ...

10/05/2026

Title : A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994 Creator(s) : Aschenbrener, Tim Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-06-01 Report Number : CDOT-DTD-R-95-14 URL : https://rosap.ntl.bts.gov/view/dot/93724
Aschenbrener, T. (1995). A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994 (Report No. CDOT-DTD-R-95-14). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93724

Aschenbrener, Tim. A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994. Report no. CDOT-DTD-R-95-14. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93724.

Aschenbrener, Tim A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994. Colorado. Department of Transportation, 1995, Report no. CDOT-DTD-R-95-14, ROSA P. https://rosap.ntl.bts.gov/view/dot/93724.
Export RIS Citation Information. TY - Tech Report AU - Aschenbrener, Tim A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - In 1994 there were significant changes to the Colorado Department of Transportation's (CDOT's) both mix asphalt program. Several programs culminated at this time. These programs included 1) aggregate and mix specifications, 2) variable laboratory compactive efforts, 3) field verification, and 4) European testing equipment. Furthermore, the use of the new SUPERPAVE binder tests and gyratory compactor will be implemented soon in Colorado. Coincidentally, 1994 was one of the busiest paving seasons for the COOT in quite some time. As a result, nine different projects were paved on the 1-25 corridor. Furthermore, the use of the new SUPERPAVE binder tests and gyratory compactor will be implemented soon in Colorado. The purpose of this paper is to document the HMA properties used on the projects for 1-25. This will provide information that can be correlated to the long-term performance of these pavements 5, 10 and hopefully even 15 years into the future. The tracking of these pavements' performance will then provide valuable information for the development or modification of specifications in the future. They may also provide new data for the use of life-cycle cost analysis, and the use of life-cycle cost analysis, and the implementation of the SUPERPAVE binder and gyratory recommendations. AN - dot:93724 DA - 1995-06-01 ET - Final Report KW - Hot mix asphalt KW - Field tests KW - Performance KW - Superpave KW - Compactors KW - Documents KW - Life cycle costing KW - Pavement overlays KW - Pavement performance KW - Properties of materials KW - Time duration KW - Field Performance KW - European Testing Equipment KW - SUPERPAVE Gyratory LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DTD-R-95-14 TI - A Documentation of Hot Mix Asphalt Overlays on 1-25 in 1994 M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93724 ER -
Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report]

MacKean, Charles

1995-06-01 | PDF

The Colorado Department of Transportation (CDOT) uses the inter-laboratory variation of bulk specific gravity results from compacted asphalt mix samples to measure the reproducibility of laboratory compactive efforts. Matched asphalt mixes tested in different laboratories had average differences of sample bulk specific gravities which were statisti ...

10/05/2026

Title : Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report] Creator(s) : MacKean, Charles Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1995-06-01 Report Number : CDOT-DTD-R-95-8 URL : https://rosap.ntl.bts.gov/view/dot/93723
MacKean, C. (1995). Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report] (Report No. CDOT-DTD-R-95-8). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93723

MacKean, Charles. Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report]. Report no. CDOT-DTD-R-95-8. Colorado. Department of Transportation, 1995. https://rosap.ntl.bts.gov/view/dot/93723.

MacKean, Charles Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report]. Colorado. Department of Transportation, 1995, Report no. CDOT-DTD-R-95-8, ROSA P. https://rosap.ntl.bts.gov/view/dot/93723.
Export RIS Citation Information. TY - Tech Report AU - MacKean, Charles A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Colorado Department of Transportation (CDOT) uses the inter-laboratory variation of bulk specific gravity results from compacted asphalt mix samples to measure the reproducibility of laboratory compactive efforts. Matched asphalt mixes tested in different laboratories had average differences of sample bulk specific gravities which were statistically significant during the 1993 paving season. This investigation identified and addressed some of the causes of these inter-laboratory differences in sample bulk specific gravities. The findings have implications for the Texas gyratory compactor and possibly for the SUPERPAVE gyratory compactor. When this investigation's recommendations were implemented in Colorado, inter-laboratory differences in average bulk specific gravity results dropped dramatically. Absolute differences between CDOT Region laboratories and the CDOT Central laboratory decreased from an average of 0.016 in 1993 to 0.002 in 1994. By taking the following steps, repeatable compaction results were achieved. Formal, scheduled equipment calibration verification was necessary for all laboratories testing asphalt mixes. Also, the loading of the mold and the compaction procedure had to be standardized to a very high degree. The loading and compaction methods must minimize segregation, have strict time limits, be achievable by novice testers, be easily taught, and have high operator acceptance to minimize intentional procedure modification. AN - dot:93723 DA - 1995-06-01 ET - Final Report KW - Aggregate segregation KW - Asphalt mixtures KW - Calibration KW - Compaction KW - Compactors KW - Laboratories KW - Mechanical analysis KW - Test procedures KW - Samples KW - Specific gravity KW - Hot mix asphalt KW - Superpave KW - bulk specific gravity KW - Texas gyratory compactor KW - inter-laboratory repeatability KW - gyratory compactor LA - English PB - Colorado. Department of Transportation PY - 1995 SN - CDOT-DTD-R-95-8 TI - Factors Affecting the Inter-Laboratory Reproducibility of the Bulk Specific Gravity of Samples Compacted Using the Texas Gyratory Compactor [Final Report] M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93723 ER -
Efficient Construction Material Testing and Inspection Based on Risk Levels

Harper, Christofer ;

Nguyen, Phuong

2026-08-14 | PDF

The South Dakota Department of Transportation (SDDOT) uses a traditional approach to construction inspection and material testing. Research in the early 1990s, Project SD91-05: Essential Testing and Inspection Levels help set the current inspection and testing program. Due to this report being more than 30 years old, SDDOT has taken steps to review ...

10/05/2026

Title : Efficient Construction Material Testing and Inspection Based on Risk Levels Creator(s) : Harper, Christofer;Nguyen, Phuong;Tran, Dan;Taylor, Timothy;Elliott, Jon; Corporate Creator(s) : Colorado State University Corporate Contributor(s) : South Dakota. Department of Transportation. Office of Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-08-14 Report Number : SD2024-02 URL : https://rosap.ntl.bts.gov/view/dot/93722
Harper, C., Nguyen, P., Tran, D., Taylor, T., & Elliott, J. (2026). Efficient Construction Material Testing and Inspection Based on Risk Levels (Report No. SD2024-02). South Dakota. Department of Transportation. Office of Research. https://rosap.ntl.bts.gov/view/dot/93722

Harper, Christofer, Phuong Nguyen, Dan Tran, Timothy Taylor, and Jon Elliott. Efficient Construction Material Testing and Inspection Based on Risk Levels. Report no. SD2024-02. South Dakota. Department of Transportation. Office of Research, 2026. https://rosap.ntl.bts.gov/view/dot/93722.

Harper, Christofer, et al. Efficient Construction Material Testing and Inspection Based on Risk Levels. South Dakota. Department of Transportation. Office of Research, 2026, Report no. SD2024-02, ROSA P. https://rosap.ntl.bts.gov/view/dot/93722.
Export RIS Citation Information. TY - Tech Report AU - Harper, Christofer AU - Nguyen, Phuong AU - Tran, Dan AU - Taylor, Timothy AU - Elliott, Jon A2 - Colorado State University A3 - South Dakota. Department of Transportation. Office of Research A3 - United States. Department of Transportation. Federal Highway Administration AB - The South Dakota Department of Transportation (SDDOT) uses a traditional approach to construction inspection and material testing. Research in the early 1990s, Project SD91-05: Essential Testing and Inspection Levels help set the current inspection and testing program. Due to this report being more than 30 years old, SDDOT has taken steps to review the feasibility of implementing risk-based approaches to construction inspection and material testing. Risk-based approaches focus on the value of each material test and inspection type, helping agencies direct resources to where they provide the most value and reduce the risk to end quality and performance. This, in turn, reduces impacts on cost, schedule, and safety. Therefore, due to limited resources, this research project investigates the current construction material testing and inspection program to determine frequencies and, if appropriate, modify it using risk-based approaches. To accomplish this, the research team conducted an intensive literature review, focus group interviews with SDDOT personnel and third-party contractors and consultants, and case studies with five state DOTs. A risk assessment was conducted using a list of material testing and construction inspection activities. Each activity was rated by 19 SDDOT field personnel, and an average expected value was calculated to identify the top-risky material testing and construction inspection activities. The risk assessment condensed down the list of material testing activities to 72 and construction inspection activities to 35.Then, a quantitative analysis of material testing and construction inspection data for189 projects from the material sampling and testing (MS&T) was conducted. This analysis confirmed the risk assessment and yielded failure rates for material testing activities. Furthermore, the rankings were validated using construction inspection diaries (287 field events across 51 projects, 2020-2026), with nearly 90% of the top-ranked inspection activities confirmed by field evidence. A staffing analysis of 83 projects found that inspection effort tracks project size rather than activity risk and is concentrated among a few lead inspectors, which reinforces the case for a risk-based program that directs limited resources to where they add the most value. The results of the data collection, review, and subsequent analyses result in a series of recommendations and priorities to adjust material testing and construction inspection frequencies at SDDOT using risk-based approaches. AN - dot:93722 DA - 2026-08-14 ET - Final Report: January 2025 - June 2026 KW - Materials tests KW - Construction KW - Inspection KW - Risk analysis KW - Data analysis KW - Quantitative analysis KW - Literature reviews KW - Focus groups KW - Construction Inspection KW - Risk-Based KW - Frequency of Testing LA - English PB - South Dakota. Department of Transportation. Office of Research PY - 2026 SN - SD2024-02 TI - Efficient Construction Material Testing and Inspection Based on Risk Levels M3 - Tech Report N1 - United States N1 - 311674 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93722 ER -
ALS Control Box Effects on MLS Azimuth Guidance Signals

Zyzys, Edmund

1988-06-01 | PDF

A full MLS consisting of a 1-deg. beamwidth +/- 60 deg. front azimuth, a 1-1/2 deg. beamwidth elevation, and a 2-deg. beamwidth +/- 40 deg. back azimuth antenna, was installed for runway 31 service at the FAA Technical Center in early March 1988. The system was procured from Allied Bendix Aerospace and designed to meet the requirements of FAR Part- ...

10/05/2026

Title : ALS Control Box Effects on MLS Azimuth Guidance Signals Creator(s) : Zyzys, Edmund Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-06-01 Report Number : CT83-140-88-13 URL : https://rosap.ntl.bts.gov/view/dot/93721
Zyzys, E. (1988). ALS Control Box Effects on MLS Azimuth Guidance Signals (Report No. CT83-140-88-13). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93721

Zyzys, Edmund. ALS Control Box Effects on MLS Azimuth Guidance Signals. Report no. CT83-140-88-13. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988. https://rosap.ntl.bts.gov/view/dot/93721.

Zyzys, Edmund ALS Control Box Effects on MLS Azimuth Guidance Signals. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988, Report no. CT83-140-88-13, ROSA P. https://rosap.ntl.bts.gov/view/dot/93721.
Export RIS Citation Information. TY - Tech Report AU - Zyzys, Edmund A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - A full MLS consisting of a 1-deg. beamwidth +/- 60 deg. front azimuth, a 1-1/2 deg. beamwidth elevation, and a 2-deg. beamwidth +/- 40 deg. back azimuth antenna, was installed for runway 31 service at the FAA Technical Center in early March 1988. The system was procured from Allied Bendix Aerospace and designed to meet the requirements of FAR Part-171, International Civil Aviation Organization (ICAO) Standards and Recommended Practices (SARP's), and the guidance accuracies in FAA STD-022b (in effect at contract award). The system replaced the old Phase Ill MLS test bed and is used to support projects requiring MLS guidance. AN - dot:93721 DA - 1988-06-01 KW - Microwave landing systems KW - Azimuth KW - Guidance systems KW - Approach control KW - Air traffic control LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988 SN - CT83-140-88-13 TI - ALS Control Box Effects on MLS Azimuth Guidance Signals M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93721 ER -
MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport

Jones, Jesse D.

1988-01-01 | PDF

The tests described in this report resulted from discussions held at Hazeltine Corporation in Commack, New York on August 28, 1987. 'It was decided at this meeting that, due to differences in the output between FAA and Hazeltine math models, a joint FAA/Hazeltine project was to be undertaken to measure the actual threshold signal strength of an MLS ...

10/05/2026

Title : MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport Creator(s) : Jones, Jesse D. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-01-01 Report Number : CT-140-88-9 URL : https://rosap.ntl.bts.gov/view/dot/93720
Jones, J. D. (1988). MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport (Report No. CT-140-88-9). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93720

Jones, Jesse D.. MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport. Report no. CT-140-88-9. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988. https://rosap.ntl.bts.gov/view/dot/93720.

Jones, Jesse D. MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988, Report no. CT-140-88-9, ROSA P. https://rosap.ntl.bts.gov/view/dot/93720.
Export RIS Citation Information. TY - Tech Report AU - Jones, Jesse D. A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The tests described in this report resulted from discussions held at Hazeltine Corporation in Commack, New York on August 28, 1987. 'It was decided at this meeting that, due to differences in the output between FAA and Hazeltine math models, a joint FAA/Hazeltine project was to be undertaken to measure the actual threshold signal strength of an MLS signal transmitted over a humped runway. These measurements were then to be compared to output from both the Hazeltine Wedge and the FAA Wait/Conda math models in an attempt to reconcile the differences. It was decided to perform the measurements at runway 17R at Denver Stapleton International Airport which has a severe-hump of approximately 60 feet. AN - dot:93720 DA - 1988-01-01 KW - Microwave landing systems KW - Mathematical models KW - Flight tests LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988 SN - CT-140-88-9 TI - MLS Signal Strength Measurements and MLS Mathematical Modeling of Runway 17R Hump at Denver Colorado, Stapleton Airport M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93720 ER -
Signal-to-Noise Ratio Conditions at Amchitka, Alaska

Erikson, Robert

1988-01-01 | PDF

The signal-to-noise-ratio (SNR) out-of-tolerance condition at Amchitka was analyzed. The issue was raised in a letter sent to National Resource Specialist, ANM-104N by Lyle Wink of AVN-240. The letter states that AVN-240 is concerned about certifying the approach into Amchitka, because the SNR may be below the -6 decibel (dB) limit for Loran C stat ...

10/05/2026

Title : Signal-to-Noise Ratio Conditions at Amchitka, Alaska Creator(s) : Erikson, Robert Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1988-01-01 Report Number : CT-140-88-1 URL : https://rosap.ntl.bts.gov/view/dot/93719
Erikson, R. (1988). Signal-to-Noise Ratio Conditions at Amchitka, Alaska (Report No. CT-140-88-1). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93719

Erikson, Robert. Signal-to-Noise Ratio Conditions at Amchitka, Alaska. Report no. CT-140-88-1. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988. https://rosap.ntl.bts.gov/view/dot/93719.

Erikson, Robert Signal-to-Noise Ratio Conditions at Amchitka, Alaska. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1988, Report no. CT-140-88-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/93719.
Export RIS Citation Information. TY - Tech Report AU - Erikson, Robert A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The signal-to-noise-ratio (SNR) out-of-tolerance condition at Amchitka was analyzed. The issue was raised in a letter sent to National Resource Specialist, ANM-104N by Lyle Wink of AVN-240. The letter states that AVN-240 is concerned about certifying the approach into Amchitka, because the SNR may be below the -6 decibel (dB) limit for Loran C station Port Clarence during certain times of the day. AVN-240 has asked AWS-100 for a waiver on the SNR issue so that they can authorize the issuance of the special instrument approach procedure. In addition, they have requested a new certification tolerance for SNR which will be provided to Anchorage FIFO for future periodic inspections. AN - dot:93719 DA - 1988-01-01 KW - Signal to noise ratio KW - Instrument flying KW - Aircraft pilotage KW - Approach LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1988 SN - CT-140-88-1 TI - Signal-to-Noise Ratio Conditions at Amchitka, Alaska M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93719 ER -
Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport

O'Brien, Paul J

1987-07-01 | PDF

The purpose of this test plan is to describe the procedural approach and analytical methods to be employed in the conduct of the test and evaluation of potential enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport, Denver, Colorado.

10/05/2026

Title : Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport Creator(s) : O'Brien, Paul J Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-07-01 Report Number : CT-110-88-6 URL : https://rosap.ntl.bts.gov/view/dot/93718
O'Brien, P. J. (1987). Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport (Report No. CT-110-88-6). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93718

O'Brien, Paul J. Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport. Report no. CT-110-88-6. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987. https://rosap.ntl.bts.gov/view/dot/93718.

O'Brien, Paul J Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987, Report no. CT-110-88-6, ROSA P. https://rosap.ntl.bts.gov/view/dot/93718.
Export RIS Citation Information. TY - Tech Report AU - O'Brien, Paul J A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The purpose of this test plan is to describe the procedural approach and analytical methods to be employed in the conduct of the test and evaluation of potential enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport, Denver, Colorado. AN - dot:93718 DA - 1987-07-01 KW - Wind shear KW - Tracking systems KW - Aeronautics KW - Information display systems KW - Warning systems KW - Wind LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987 SN - CT-110-88-6 TI - Test Plan for the Evaluation of Enhancements to the Low Level Wind Shear Alert System (LLWAS) at Stapleton International Airport M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93718 ER -
Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement

Darby, Evan R ;

Shingledecker, C

1998-08-01 | PDF

This report documents the results of a controller design review of the proposed functionality and computer-human interface for Controller-Pilot Data Link Communications Build 1 (CPDLC-I) planned for implementation on the Display System Replacement (DSR).

10/05/2026

Title : Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement Creator(s) : Darby, Evan R;Shingledecker, C; 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 Published Date : 1998-08-01 Report Number : DOT/FAA/CT-98/16 URL : https://rosap.ntl.bts.gov/view/dot/93717
Darby, E. R., & Shingledecker, C. (1998). Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement (Report No. DOT/FAA/CT-98/16). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93717

Darby, Evan R and C Shingledecker. Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement. Report no. DOT/FAA/CT-98/16. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1998. https://rosap.ntl.bts.gov/view/dot/93717.

Darby, Evan R, and C Shingledecker Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1998, Report no. DOT/FAA/CT-98/16, ROSA P. https://rosap.ntl.bts.gov/view/dot/93717.
Export RIS Citation Information. TY - Tech Report AU - Darby, Evan R AU - Shingledecker, C A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - This report documents the results of a controller design review of the proposed functionality and computer-human interface for Controller-Pilot Data Link Communications Build 1 (CPDLC-I) planned for implementation on the Display System Replacement (DSR). AN - dot:93717 DA - 1998-08-01 ET - Final Report KW - Air traffic control KW - Air traffic controllers KW - Communication systems KW - Human factors engineering KW - Psychology LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1998 SN - DOT/FAA/CT-98/16 TI - Design Review of the Controller-Pilot Data Link Communications - Build I (CPDLC-1) Functionality and Computer-Human Interface for the Display System Replacement M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93717 ER -
A Field Study of Transponder Performance in General Aviation Aircraft

Talotta, Nicholas J. ;

Wapelhorst, Leo

1997-12-01 | PDF

This report documents the results of a field study conducted to sample the technical health of transponders carried by General Aviation (GA) aircraft currently operating in the National Airspace System (NAS).

10/05/2026

Title : A Field Study of Transponder Performance in General Aviation Aircraft Creator(s) : Talotta, Nicholas J.;Wapelhorst, Leo;Shingledecker, C; 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 Published Date : 1997-12-01 Report Number : DOT/FAA/CT-97/7 URL : https://rosap.ntl.bts.gov/view/dot/93716
Talotta, N. J., Wapelhorst, L., & Shingledecker, C. (1997). A Field Study of Transponder Performance in General Aviation Aircraft (Report No. DOT/FAA/CT-97/7). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93716

Talotta, Nicholas J., Leo Wapelhorst, and C Shingledecker. A Field Study of Transponder Performance in General Aviation Aircraft. Report no. DOT/FAA/CT-97/7. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1997. https://rosap.ntl.bts.gov/view/dot/93716.

Talotta, Nicholas J., et al. A Field Study of Transponder Performance in General Aviation Aircraft. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1997, Report no. DOT/FAA/CT-97/7, ROSA P. https://rosap.ntl.bts.gov/view/dot/93716.
Export RIS Citation Information. TY - Tech Report AU - Talotta, Nicholas J. AU - Wapelhorst, Leo AU - Shingledecker, C A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - This report documents the results of a field study conducted to sample the technical health of transponders carried by General Aviation (GA) aircraft currently operating in the National Airspace System (NAS). AN - dot:93716 DA - 1997-12-01 ET - Final Report KW - Air traffic control KW - Evaluation KW - Transponders LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1997 SN - DOT/FAA/CT-97/7 TI - A Field Study of Transponder Performance in General Aviation Aircraft M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93716 ER -
Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System

Ozmore, R. E. ;

Morrow, Sherri L

1996-09-01 | PDF

A real time simulation was conducted to evaluate simultaneous ILS approaches to two runways spaced 3000 ft apart with one localizer offset by 2.5 degrees. Air traffic controllers monitored traffic using a simulated Precision Runway Monitor (PRM) system which consisted of Final Monitor Aid (FMA) displays and a simulated radar update rate of 1.0 seco ...

10/05/2026

Title : Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System Creator(s) : Ozmore, R. E.;Morrow, Sherri L; 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 Published Date : 1996-09-01 Report Number : DOT/FAA/CT-96/2 URL : https://rosap.ntl.bts.gov/view/dot/93715
Ozmore, R. E., & Morrow, S. L. (1996). Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System (Report No. DOT/FAA/CT-96/2). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93715

Ozmore, R. E. and Sherri L Morrow. Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System. Report no. DOT/FAA/CT-96/2. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1996. https://rosap.ntl.bts.gov/view/dot/93715.

Ozmore, R. E., and Sherri L Morrow Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1996, Report no. DOT/FAA/CT-96/2, ROSA P. https://rosap.ntl.bts.gov/view/dot/93715.
Export RIS Citation Information. TY - Tech Report AU - Ozmore, R. E. AU - Morrow, Sherri L A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - A real time simulation was conducted to evaluate simultaneous ILS approaches to two runways spaced 3000 ft apart with one localizer offset by 2.5 degrees. Air traffic controllers monitored traffic using a simulated Precision Runway Monitor (PRM) system which consisted of Final Monitor Aid (FMA) displays and a simulated radar update rate of 1.0 second. Aircraft blunders were introduced to test the air traffic control system ability to maintain adequate separation between aircraft on final approaches during critical situations using the proposed runway configuration. Four criteria were developed by the Multiple Parallel Approach Program (MPAP) Technical Work Group to evaluate the study: (1) the number of Test Criterion Violations (TCVs) relative to the total number of at-risk, non-responding blunders, and relative to a predetermined target level of safety of no more than one fatal accident per 25,000,000 approaches; (2) the frequency of No Transgression Zone (NTZ) entries and nuisance breakouts (NBOs); (3) an evaluation of controller communications workload; and (4) an operational assessment from MPAP TWG members and participating controller and pilot technical observers. The results of the simulation passed all of the test criteria The MPAP TWG recommended the 3000-ft dual offset procedure for approval in the operational environment, given similar controller and pilot training, when the PRM system is used. AN - dot:93715 DA - 1996-09-01 ET - Final Report KW - Air traffic control KW - Airline pilots KW - Airport runways KW - Approach KW - Flight training KW - Instrument landing systems LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1996 SN - DOT/FAA/CT-96/2 TI - Evaluation of Dual Simultaneous Instrument Landing System Approaches to Runways Spaced 3000 Feet Apart with One Localizer Offset Using a Precision Runway Monitor System M3 - Tech Report N1 - United States N1 - F2006D1 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93715 ER -

Previous Page Previous

321 - 340 / 527

Next Page Next

Found an issue?

Send us an email at: publishinghd@cdc.gov