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Showing 101 - 120 of 527 results

Evaluation of Swareflex Wildlife Warning Reflectors

Woodham, Dave

1991-07-01 | PDF

Swareflex wildlife warning reflectors were installed on a four-mile section of road near Denver. Two half-mile test sections were alternately covered and uncovered for a three-month period to see if any significant change in deer-vehicle accidents could be detected. No accidents occurred in the test sections during the evaluation period. The cover/ ...

10/13/2026

Title : Evaluation of Swareflex Wildlife Warning Reflectors Creator(s) : Woodham, Dave Corporate Creator(s) : Colorado. Department of Transportation Published Date : 1991-07-01 Report Number : CDOT-DTD-R-91-11 URL : https://rosap.ntl.bts.gov/view/dot/93954
Woodham, D. (1991). Evaluation of Swareflex Wildlife Warning Reflectors (Report No. CDOT-DTD-R-91-11). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93954

Woodham, Dave. Evaluation of Swareflex Wildlife Warning Reflectors. Report no. CDOT-DTD-R-91-11. Colorado. Department of Transportation, 1991. https://rosap.ntl.bts.gov/view/dot/93954.

Woodham, Dave Evaluation of Swareflex Wildlife Warning Reflectors. Colorado. Department of Transportation, 1991, Report no. CDOT-DTD-R-91-11, ROSA P. https://rosap.ntl.bts.gov/view/dot/93954.
Export RIS Citation Information. TY - Tech Report AU - Woodham, Dave A2 - Colorado. Department of Transportation AB - Swareflex wildlife warning reflectors were installed on a four-mile section of road near Denver. Two half-mile test sections were alternately covered and uncovered for a three-month period to see if any significant change in deer-vehicle accidents could be detected. No accidents occurred in the test sections during the evaluation period. The cover/uncover evaluation method proved too costly for the limited budget of this study. Photometric measurements of the reflectors have been made using vehicle headlights as the light source. The use of wildlife warning reflectors should be discontinued until more evidence is available on their effectiveness--especially on mule deer. A regional pooled-fund study should be started to investigate the effect of the reflectors on mule deer. This needs to be a large-scale effort to obtain results in a short period of time and to ensure validity. AN - dot:93954 DA - 1991-07-01 ET - Final Report KW - Deer KW - Measures of effectiveness KW - Night KW - Performance evaluations KW - Photometry KW - Prevention KW - Reflectorized materials KW - Safety KW - Warning systems KW - Wildlife KW - Animal vehicle crashes KW - Deer Reflectors KW - Swareflex KW - wildlife Protection LA - English PB - Colorado. Department of Transportation PY - 1991 SN - CDOT-DTD-R-91-11 TI - Evaluation of Swareflex Wildlife Warning Reflectors M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93954 ER -
Ice-Detection System Evaluation

Woodham, Dave

1991-08-01 | PDF

This evaluation consisted of interviews with SCAN ice-detection system users and evaluations of the manpower and material savings associated with the use of the system as well as the possible influences the system may have on accidents which occur during winter conditions. It appears that salt/sand usage and overtime costs have been reduced by the ...

10/13/2026

Title : Ice-Detection System Evaluation Creator(s) : Woodham, Dave Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1991-08-01 Report Number : CDOT-DTD-R-91-10 URL : https://rosap.ntl.bts.gov/view/dot/93953
Woodham, D. (1991). Ice-Detection System Evaluation (Report No. CDOT-DTD-R-91-10). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93953

Woodham, Dave. Ice-Detection System Evaluation. Report no. CDOT-DTD-R-91-10. Colorado. Department of Transportation, 1991. https://rosap.ntl.bts.gov/view/dot/93953.

Woodham, Dave Ice-Detection System Evaluation. Colorado. Department of Transportation, 1991, Report no. CDOT-DTD-R-91-10, ROSA P. https://rosap.ntl.bts.gov/view/dot/93953.
Export RIS Citation Information. TY - Tech Report AU - Woodham, Dave A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This evaluation consisted of interviews with SCAN ice-detection system users and evaluations of the manpower and material savings associated with the use of the system as well as the possible influences the system may have on accidents which occur during winter conditions. It appears that salt/sand usage and overtime costs have been reduced by the use of the SCAN system. Anecdotal information suggests that there have been fewer winter accidents at one instrumented site. The system provides relevant information to maintenance decision makers. The overall effectiveness of the system is dependent on how users accept and will use the information. AN - dot:93953 DA - 1991-08-01 ET - Final Report KW - Winter maintenance KW - Cost effectiveness KW - Decision making KW - Detectors KW - Ice KW - Performance evaluations KW - Safety KW - Snow and ice control KW - Traffic safety KW - Ice-Detection KW - SCAN LA - English PB - Colorado. Department of Transportation PY - 1991 SN - CDOT-DTD-R-91-10 TI - Ice-Detection System Evaluation M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93953 ER -
Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado

McGennis, Robert B. ;

Rask, Robert T.

1992-01-01 | PDF

This report summarizes the results of a one-year effort to investigate an instance of substandard asphalt pavement performance on IH-70 in eastern Colorado. When the problem was identified, the Colorado Department of Transportation (CDOT) and the Asphalt Institute agreed to jointly analyze the cause of the distress. The main goal of this effort was ...

10/13/2026

Title : Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado Creator(s) : McGennis, Robert B.;Rask, Robert T.;Aschenbrener, Timothy B.; Corporate Creator(s) : Asphalt Institute Corporate Contributor(s) : Colorado. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1992-01-01 Report Number : CDOT-SM-AI-92-15 URL : https://rosap.ntl.bts.gov/view/dot/93952
McGennis, R. B., Rask, R. T., & Aschenbrener, T. B. (1992). Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado (Report No. CDOT-SM-AI-92-15). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93952

McGennis, Robert B., Robert T. Rask, and Timothy B. Aschenbrener. Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado. Report no. CDOT-SM-AI-92-15. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93952.

McGennis, Robert B., et al. Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado. Colorado. Department of Transportation, 1992, Report no. CDOT-SM-AI-92-15, ROSA P. https://rosap.ntl.bts.gov/view/dot/93952.
Export RIS Citation Information. TY - Tech Report AU - McGennis, Robert B. AU - Rask, Robert T. AU - Aschenbrener, Timothy B. A2 - Asphalt Institute A3 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report summarizes the results of a one-year effort to investigate an instance of substandard asphalt pavement performance on IH-70 in eastern Colorado. When the problem was identified, the Colorado Department of Transportation (CDOT) and the Asphalt Institute agreed to jointly analyze the cause of the distress. The main goal of this effort was to determine the cause(s) of the distress so that CDOT engineers could make more informed decisions regarding possible material and specification changes to enhance asphalt pavement performance. It was determined that the IH-70 overlay failure was due to stripping. It is unclear why the mix design and quality control stripping tests did not accurately predict such a severe stripping failure. It is recommended that CDOT perform a full factorial analysis on the test method with a variety of mixtures of known performance characteristics. Other recommendations are that CDOT should perform a study to evaluate the necessity of implementing a sand equivalent requirement, consider performing a study aimed at developing a better dust management strategy, and consider limiting the amount of P200 in mixtures used on higher volume pavements. Also, CDOT should consider exercising greater control over rut-filling or levelling courses. A better alternative to rut-filling or levelling courses would be for CDOT to specify cold milling as part of the overall rehabilitation strategy. AN - dot:93952 DA - 1992-01-01 KW - Asphalt pavements KW - Defects KW - Driver rehabilitation KW - Dust control KW - Milling KW - Mix design KW - Pavement distress KW - Pavement overlays KW - Pavement stripping KW - Bituminous overlays KW - Quality control KW - Recommendations KW - Sand equivalent test KW - Test procedures LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-SM-AI-92-15 TI - Investigation of Premature Distress in Asphalt Overlays on IH-70 in Colorado M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93952 ER -
Colorado Department of Transportation Asphalt Pavement White Paper

Colorado. Department of Transportation

1992-01-01 | PDF

Over the past several years, numerous changes have been incorporated into the hot bituminous pavement design and construction process. Design and construction problems encountered during the 1991 asphalt paving season as a result of these changes have been identified and corrective actions are addressed in this paper.

10/13/2026

Title : Colorado Department of Transportation Asphalt Pavement White Paper Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-01-01 Report Number : CDOT-DTD-R-92-1 URL : https://rosap.ntl.bts.gov/view/dot/93951
Colorado. Department of Transportation (1992). Colorado Department of Transportation Asphalt Pavement White Paper (Report No. CDOT-DTD-R-92-1). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93951

Colorado. Department of Transportation. Colorado Department of Transportation Asphalt Pavement White Paper. Report no. CDOT-DTD-R-92-1. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93951.

Colorado. Department of Transportation Colorado Department of Transportation Asphalt Pavement White Paper. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/93951.
Export RIS Citation Information. TY - Tech Report A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Over the past several years, numerous changes have been incorporated into the hot bituminous pavement design and construction process. Design and construction problems encountered during the 1991 asphalt paving season as a result of these changes have been identified and corrective actions are addressed in this paper. AN - dot:93951 DA - 1992-01-01 KW - Aggregate gradation KW - Compaction KW - Aggregate segregation KW - Asphalt pavements KW - Calcium oxide KW - Flexible pavements KW - Hot mix asphalt KW - Mix design KW - Pavement design KW - Paving KW - Seal coats KW - VMA KW - In-Place Voids KW - Lime Mixing LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-1 TI - Colorado Department of Transportation Asphalt Pavement White Paper M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93951 ER -
Hot Water Deicing of Aircraft

Dawson, Peter ;

Hanna, Medhat

2000-08-01 | PDF

A research program was undertaken to further examine environmental limits for the application of hot water as the first-step fluid in a two-step deicing procedure. Results from several previous related studies were used to determine an approach to current testing and as sources of related data. Tests on flat plates were conducted at the National Re ...

10/13/2026

Title : Hot Water Deicing of Aircraft Creator(s) : Dawson, Peter;Hanna, Medhat; Corporate Creator(s) : APS Aviation Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research;Canada. Transport Canada; Published Date : 2000-08-01 Report Number : DOT/FAA/AR-00/40 URL : https://rosap.ntl.bts.gov/view/dot/93950
Dawson, P., & Hanna, M. (2000). Hot Water Deicing of Aircraft (Report No. DOT/FAA/AR-00/40). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93950

Dawson, Peter and Medhat Hanna. Hot Water Deicing of Aircraft. Report no. DOT/FAA/AR-00/40. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93950.

Dawson, Peter, and Medhat Hanna Hot Water Deicing of Aircraft. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/40, ROSA P. https://rosap.ntl.bts.gov/view/dot/93950.
Export RIS Citation Information. TY - Tech Report AU - Dawson, Peter AU - Hanna, Medhat A2 - APS Aviation Inc A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research A3 - Canada. Transport Canada A4 - Boris, Paul AB - A research program was undertaken to further examine environmental limits for the application of hot water as the first-step fluid in a two-step deicing procedure. Results from several previous related studies were used to determine an approach to current testing and as sources of related data. Tests on flat plates were conducted at the National Research Council Canada (NRC), Climatic Engineering Facility (CEF) in Ottawa. Test parameters included temperature, wind, active precipitation (type and rate), and substrate material. (Standard test plates were fabricated from typical aircraft composite materials as well as from aircraft aluminum.) A controlled level of contamination was allowed to collect on the plates prior to each test run by exposing the plate to precipitation for a predetermined time interval. The resulting layer of ice contamination was then removed by spraying as much fluid as was required to produce a clean plate. Fluids tested included water, diluted Society of Automotive Engineers (SAE) Type I fluid, and full strength SAE Type I fluid. The most critical data measured in these trials were the time intervals between fluid application (spray) and first appearance of ice on test surfaces. An interval of at least 3 minutes was the key indicator of acceptable temperature and wind limits. Laboratory testing has shown that at a precipitation rate of 25 gm/cm2/hr, hot water provides a period of protection equal to or better than Type I mixed to the approved buffer (-3°C) at outside air temperature (OAT) down to -6°C and wind speeds to 10 kph. A Type I premix provided about the same period of protection at the same test conditions (2 to 3 minutes). Increasing the level of surface contamination has no significant effect on fluid performance since increased quantities of hot water are required to deice, which negates the effect of increased contamination. A 3-minute window before the onset of freezing, using hot water in quantities greater than what is required to deice, is attainable down to an OAT of -9°C with wind up to 10 kph on aluminum surfaces. AN - dot:93950 DA - 2000-08-01 ET - Final Report KW - Aircraft KW - Aluminum KW - Atmospheric temperature KW - Composite materials KW - Deicing KW - Freezing point KW - Laboratory tests LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/40 TI - Hot Water Deicing of Aircraft M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93950 ER -
Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado

Mears, Art

1992-03-01 | PDF

The East Riverside avalanche path crosses Highway 550 approximately 5 miles (8 km) south of Ouray, Colorado. By itself, the East Riverside represents approximately 10% of the total avalanche hazard between Ouray and Durango and has caused five fatalities in three separate accidents in 1963, 1970, and 1978. In 1985, the Colorado Department of Highwa ...

10/13/2026

Title : Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado Creator(s) : Mears, Art Corporate Creator(s) : Art Mear Consulting Corporate Contributor(s) : Colorado. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1992-03-01 Report Number : CDOT-DTD-R-92-4 URL : https://rosap.ntl.bts.gov/view/dot/93949
Mears, A. (1992). Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado (Report No. CDOT-DTD-R-92-4). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93949

Mears, Art. Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado. Report no. CDOT-DTD-R-92-4. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93949.

Mears, Art Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-4, ROSA P. https://rosap.ntl.bts.gov/view/dot/93949.
Export RIS Citation Information. TY - Tech Report AU - Mears, Art A2 - Art Mear Consulting A3 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The East Riverside avalanche path crosses Highway 550 approximately 5 miles (8 km) south of Ouray, Colorado. By itself, the East Riverside represents approximately 10% of the total avalanche hazard between Ouray and Durango and has caused five fatalities in three separate accidents in 1963, 1970, and 1978. In 1985, the Colorado Department of Highways built a 180-foot (55 m) long avalanche shed to protect the highway from the smaller, frequent avalanches. During construction, 32 strain gages and six load cells were welded to reinforcing steel in the structure to measure avalanche-induced strains and loads. These data are intended to be used for future shed design. Avalanche velocities were measured in two events and estimated in eight others by a simple empirical runup equation. Measured and computed velocities ranged from 69 to 124 mph (31 to 55 m/s); however, avalanches were relatively small, ranging from 10 to 30% of design size. More detailed avalanche-dynamics calculations applied a stochastic particle model to compute velocity and momentum distributions at the shed and compute shear stresses. The results of the runup equation and stochastic modeling were in general agreement with measurements. The central core of flowing avalanche debris was confined by the shed in 11 of 12 events; however, the powder blast extended beyond the north portal in six avalanches, and beyond both portals in four avalanches. Any future shed extension should first be built on the north end. AN - dot:93949 DA - 1992-03-01 ET - Final Report KW - Avalanches KW - Data collection KW - Equations KW - Fatalities KW - Load cells KW - Loads KW - Mathematical models KW - Measurement KW - Mechanical strain KW - Momentum KW - Performance KW - Shear stress KW - State highways KW - Stochastic processes KW - Strain gages KW - Structural analysis KW - Velocity KW - Avalanche Dynamics KW - Snowshed LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-4 TI - Avalanche Characteristics and Structure Response: East Riverside Avalanche Shed, Highway 550, Ouray, Colorado M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93949 ER -
Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft

United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center

2000-09-01 | PDF

Task 12A of the Federal Aviation Administration (FAA) Aircraft In-Flight Icing Plan states that the "FAA, along with industry and research organizations, shall form a working group to explore categories of ice accretions that represent potential safety problems on aircraft" with the goal of developing guidance material on the determination of criti ...

10/13/2026

Title : Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft 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. Office of Aviation Research Published Date : 2000-09-01 Report Number : DOT/FAA/AR-00/37 URL : https://rosap.ntl.bts.gov/view/dot/93948
United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center (2000). Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft (Report No. DOT/FAA/AR-00/37). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93948

United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft. Report no. DOT/FAA/AR-00/37. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93948.

United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/37, ROSA P. https://rosap.ntl.bts.gov/view/dot/93948.
Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - Task 12A of the Federal Aviation Administration (FAA) Aircraft In-Flight Icing Plan states that the "FAA, along with industry and research organizations, shall form a working group to explore categories of ice accretions that represent potential safety problems on aircraft" with the goal of developing guidance material on the determination of critical ice accretion shapes and roughness in aircraft certification. Accordingly, the 12A Working Group, on critical ice shapes used in icing certification, was formed under the joint leadership of the FAA and the National Aeronautics and Space Administration (NASA) in November 1997. This report describes the activities and findings of the 12A Working Group and its recommended actions for progress to meet the goals stated in the FAA Aircraft In-Flight Icing Plan. AN - dot:93948 DA - 2000-09-01 ET - Final Report KW - Aircraft KW - Certification KW - Guidelines KW - Ice formations LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/37 TI - Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93948 ER -
Gilsonite, an Asphalt Modifier

Harmelink, Donna S.

1992-03-01 | PDF

Over the last several years Colorado asphalt pavements have experienced early deterioration and premature pavement failures. This study evaluated the product, Gilsonite. Gilsonite is a naturally occurring solid hydrocarbon and is currently being marketed as an asphalt modifier. Gilsonite is a modifier which is intended to increase the stability of ...

10/13/2026

Title : Gilsonite, an Asphalt Modifier Creator(s) : Harmelink, Donna S. Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-03-01 Report Number : CDOT-DTD-R-92-3 URL : https://rosap.ntl.bts.gov/view/dot/93947
Harmelink, D. S. (1992). Gilsonite, an Asphalt Modifier (Report No. CDOT-DTD-R-92-3). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93947

Harmelink, Donna S.. Gilsonite, an Asphalt Modifier. Report no. CDOT-DTD-R-92-3. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93947.

Harmelink, Donna S. Gilsonite, an Asphalt Modifier. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-3, ROSA P. https://rosap.ntl.bts.gov/view/dot/93947.
Export RIS Citation Information. TY - Tech Report AU - Harmelink, Donna S. A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Over the last several years Colorado asphalt pavements have experienced early deterioration and premature pavement failures. This study evaluated the product, Gilsonite. Gilsonite is a naturally occurring solid hydrocarbon and is currently being marketed as an asphalt modifier. Gilsonite is a modifier which is intended to increase the stability of the pavement and help resist rutting often found on today's pavements. Following the 3-year evaluation, the data indicates the addition of Gilsonite, although it does appear to reduce or retard rutting, tends to harden the pavement creating a pavement structure which is more susceptible to premature cracking. The cracks appeared at a much faster rate and the cracks tended to deteriorate quicker and to a greater extent in the Gilsonite section. AN - dot:93947 DA - 1992-03-01 ET - Final Report KW - Asphalt KW - Elastomer modified asphalt KW - Pavement cracking KW - Pavement performance KW - Pavement ruts KW - Performance evaluations KW - Rutting KW - Asphalt additives KW - Gilsonite LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-3 TI - Gilsonite, an Asphalt Modifier M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93947 ER -
Expansive Soil Treatment Methods in Colorado

Ardani, Ahmad

1992-03-01 | PDF

This report reviews and summarizes the effectiveness of past expansive soils treatment methods used by Colorado DOT and other transportation agencies. Among the treatment methods evaluated were the following: Sub-excavation and removal of expansive soils and replacement with non-expansive soil; application of heavy applied load to balance the swell ...

10/13/2026

Title : Expansive Soil Treatment Methods in Colorado Creator(s) : Ardani, Ahmad Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-03-01 Report Number : CDOT-DTD-R-92-2 URL : https://rosap.ntl.bts.gov/view/dot/93946
Ardani, A. (1992). Expansive Soil Treatment Methods in Colorado (Report No. CDOT-DTD-R-92-2). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93946

Ardani, Ahmad. Expansive Soil Treatment Methods in Colorado. Report no. CDOT-DTD-R-92-2. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93946.

Ardani, Ahmad Expansive Soil Treatment Methods in Colorado. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-2, ROSA P. https://rosap.ntl.bts.gov/view/dot/93946.
Export RIS Citation Information. TY - Tech Report AU - Ardani, Ahmad A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report reviews and summarizes the effectiveness of past expansive soils treatment methods used by Colorado DOT and other transportation agencies. Among the treatment methods evaluated were the following: Sub-excavation and removal of expansive soils and replacement with non-expansive soil; application of heavy applied load to balance the swelling pressure; preventing access of water to the soil by encapsulation; stabilization by means of chemical admixtures; mechanical stabilization; explosive treatment to correct swelling shales; pre-wetting the soil; and avoiding the expansive soil. A survey questionnaire was designed and sent to the District Materials Engineers to obtain their consensus on the treatment techniques used in Colorado. The results of this survey are presented in Part VIII of the report. The results of this study showed that the performance of some of the swelling soil treatment methods used in Colorado have been poor. As a result, initiation of the second phase of study is recommended. The ultimate goal of the second phase will be to establish up-to-date design guidelines that offer specific strategies for highway construction on swelling soils and swelling shales in Colorado. AN - dot:93946 DA - 1992-03-01 ET - Final Report KW - Swelling soils KW - Clay soils KW - Soil suction KW - Admixtures KW - Data collection KW - Encapsulation KW - Explosives KW - Loading and unloading KW - Measures of effectiveness KW - Questionnaires KW - Shale KW - Soils KW - Surveys KW - Wetting KW - Literature reviews KW - Expansive Soils KW - Treatment Alternatives LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-2 TI - Expansive Soil Treatment Methods in Colorado M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93946 ER -
Special Polymer Modified Asphalt Cement [Interim Report]

Harmelink, Donna S.

1992-04-01 | PDF

This report covers the pre-construction, construction and the first evaluation following construction at the following locations: I-25, Colorado Boulevard; I-25, Pueblo; Highway 85, Santa Fe Avenue; and I-70, Flagler. An additional project has been added that will be constructed during the 1992 construction season. This project is located on Bright ...

10/13/2026

Title : Special Polymer Modified Asphalt Cement [Interim Report] Creator(s) : Harmelink, Donna S. Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-04-01 Report Number : CDOT-DTD-R-92-5 URL : https://rosap.ntl.bts.gov/view/dot/93945
Harmelink, D. S. (1992). Special Polymer Modified Asphalt Cement [Interim Report] (Report No. CDOT-DTD-R-92-5). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93945

Harmelink, Donna S.. Special Polymer Modified Asphalt Cement [Interim Report]. Report no. CDOT-DTD-R-92-5. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93945.

Harmelink, Donna S. Special Polymer Modified Asphalt Cement [Interim Report]. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-5, ROSA P. https://rosap.ntl.bts.gov/view/dot/93945.
Export RIS Citation Information. TY - Tech Report AU - Harmelink, Donna S. A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report covers the pre-construction, construction and the first evaluation following construction at the following locations: I-25, Colorado Boulevard; I-25, Pueblo; Highway 85, Santa Fe Avenue; and I-70, Flagler. An additional project has been added that will be constructed during the 1992 construction season. This project is located on Brighton Boulevard between I-70 and Sand Creek. This project will contain a section with Type I polymer, a section with Type III polymer and also a section with no binder. AN - dot:93945 DA - 1992-04-01 ET - Interim Report KW - Polymers KW - Polymer asphalt KW - Additives KW - Rutting KW - Cracking KW - Asphalt cement LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-5 TI - Special Polymer Modified Asphalt Cement [Interim Report] M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93945 ER -
Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks

Riple, Arnie B. ;

Suprenant, Bruce A.

1992-06-01 | PDF

Reinforcing steel in concrete is protected by a passive layer that is destroyed when exposed to chlorides. To maintain a bare deck, deicing salts that contain chlorides are used to remove the snow and ice. The chlorides penetrate the concrete, destroy the passive layer surrounding the reinforcing, and help initiate corrosion of the rebar. A compute ...

10/13/2026

Title : Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks Creator(s) : Riple, Arnie B.;Suprenant, Bruce A.; Corporate Creator(s) : University of Colorado at Boulder. Dept. of Civil, Environmental and Architectural Engineering Corporate Contributor(s) : Colorado. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1992-06-01 Report Number : CDOT-DTD-R-92-7 URL : https://rosap.ntl.bts.gov/view/dot/93944
Riple, A. B., & Suprenant, B. A. (1992). Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks (Report No. CDOT-DTD-R-92-7). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93944

Riple, Arnie B. and Bruce A. Suprenant. Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks. Report no. CDOT-DTD-R-92-7. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93944.

Riple, Arnie B., and Bruce A. Suprenant Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-7, ROSA P. https://rosap.ntl.bts.gov/view/dot/93944.
Export RIS Citation Information. TY - Tech Report AU - Riple, Arnie B. AU - Suprenant, Bruce A. A2 - University of Colorado at Boulder. Dept. of Civil, Environmental and Architectural Engineering A3 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Reinforcing steel in concrete is protected by a passive layer that is destroyed when exposed to chlorides. To maintain a bare deck, deicing salts that contain chlorides are used to remove the snow and ice. The chlorides penetrate the concrete, destroy the passive layer surrounding the reinforcing, and help initiate corrosion of the rebar. A computer program has been developed to calculate the chloride diffusion in concrete and to assist the engineer in analyzing existing bridge decks and future concrete repairs. The computer program calculates the diffusion coefficient, the applied surface chloride loads, and future chloride profiles based on chloride profiles from core tests. The program can evaluate different deck designs including changes in concrete cover, chloride loads, concrete type, sealer application and life, and other variables. The program is user-friendly and operates on a 386PC with a VGA screen. AN - dot:93944 DA - 1992-06-01 ET - Final Report: 10/90 through 6/92 KW - Chloride content KW - Bridge management systems KW - Corrosion KW - Analysis KW - Bridge decks KW - Chlorides KW - Computer programs KW - Concrete KW - Corrosion protection KW - Concrete bridges KW - Reinforced concrete bridges KW - Chloride diffusion LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-7 TI - Chloride Content Program for the Evaluation of Reinforced Concrete Bridge Decks M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93944 ER -
A User Experience With Hydrain

Johnson, Gary

1992-03-31 | PDF

This report briefly summarizes the beta testing, by a state transportation agency, of HYDRAIN. HYDRAIN is a personal computer-based hydraulic design software package developed by GKY Consultants under FHWA Pool Fund Study HPR-2(126). Several versions of HYDRAIN were tested. Questions and problems were discussed with GKY Consultants, the FHWA contra ...

10/13/2026

Title : A User Experience With Hydrain Creator(s) : Johnson, Gary Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-03-31 Report Number : CDOT-DTD-R-92-06 URL : https://rosap.ntl.bts.gov/view/dot/93943
Johnson, G. (1992). A User Experience With Hydrain (Report No. CDOT-DTD-R-92-06). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93943

Johnson, Gary. A User Experience With Hydrain. Report no. CDOT-DTD-R-92-06. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93943.

Johnson, Gary A User Experience With Hydrain. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-06, ROSA P. https://rosap.ntl.bts.gov/view/dot/93943.
Export RIS Citation Information. TY - Brief AU - Johnson, Gary A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report briefly summarizes the beta testing, by a state transportation agency, of HYDRAIN. HYDRAIN is a personal computer-based hydraulic design software package developed by GKY Consultants under FHWA Pool Fund Study HPR-2(126). Several versions of HYDRAIN were tested. Questions and problems were discussed with GKY Consultants, the FHWA contractor, and then documented in our quarterly reports to improve the software. Some computer bugs were encountered and corrected through interaction with GKY Consultants, while other minor bugs still remain in the current Version 3. No accuracy problems were ever encountered after input errors were resolved. Version 4 may correct most of these remaining bugs. AN - dot:93943 DA - 1992-03-31 ET - Final Report KW - Computer programs KW - Hydraulics KW - Design KW - Analysis KW - Bridges and culverts KW - Storm sewers KW - User experience KW - Hydraulic Design Analysis LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-06 TI - A User Experience With Hydrain M3 - Brief N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93943 ER -
Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement

Aschenbrener, Timothy B. ;

Stuart, Kevin

1992-09-01 | PDF

The Colorado Department of Transportation (CDOT) and the Turner-Fairbank Highway Research Center (TFHRC) will be demonstrating some European testing equipment for hot mix asphalt. The equipment includes the French mixer, French gyratory compactor, French plate compactor, French mixer, Hamburg wheel tracking device and the Georgia loaded wheel teste ...

10/13/2026

Title : Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement Creator(s) : Aschenbrener, Timothy B.;Stuart, Kevin; Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1992-09-01 Report Number : CDOT-DTD-R-92-10 URL : https://rosap.ntl.bts.gov/view/dot/93942
Aschenbrener, T. B., & Stuart, K. (1992). Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement (Report No. CDOT-DTD-R-92-10). Colorado. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/93942

Aschenbrener, Timothy B. and Kevin Stuart. Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement. Report no. CDOT-DTD-R-92-10. Colorado. Department of Transportation, 1992. https://rosap.ntl.bts.gov/view/dot/93942.

Aschenbrener, Timothy B., and Kevin Stuart Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement. Colorado. Department of Transportation, 1992, Report no. CDOT-DTD-R-92-10, ROSA P. https://rosap.ntl.bts.gov/view/dot/93942.
Export RIS Citation Information. TY - Tech Report AU - Aschenbrener, Timothy B. AU - Stuart, Kevin A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Colorado Department of Transportation (CDOT) and the Turner-Fairbank Highway Research Center (TFHRC) will be demonstrating some European testing equipment for hot mix asphalt. The equipment includes the French mixer, French gyratory compactor, French plate compactor, French mixer, Hamburg wheel tracking device and the Georgia loaded wheel tester. The advantages, disadvantages, costs and manufacturers are discussed. The joint research project between CDOT and TFHRC to evaluate the equipment and asphalt mixes is included. AN - dot:93942 DA - 1992-09-01 ET - Final Report KW - Testing equipment KW - Hot mix asphalt KW - Compactors KW - Costs KW - Industries KW - Mixers KW - Pavement ruts KW - Performance evaluations KW - Technology KW - European Testing Equipment LA - English PB - Colorado. Department of Transportation PY - 1992 SN - CDOT-DTD-R-92-10 TI - Description of the Demonstration of European Testing Equipment for Hot Mix Asphalt Pavement M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93942 ER -
Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems

Reinhardt, John ;

Blake, David

2000-09-01 | PDF

This report documents the test results of the testing conducted during the development of a minimum performance standard for aircraft cargo compartment gaseous fire suppression systems. It also includes the final version of the standard. The development work was performed in conjunction with the International Halon Replacement Working Group.

10/13/2026

Title : Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems Creator(s) : Reinhardt, John;Blake, David;Marker, Timothy; 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. Office of Aviation Research Published Date : 2000-09-01 Report Number : DOT/FAA/AR-00/28 URL : https://rosap.ntl.bts.gov/view/dot/93941
Reinhardt, J., Blake, D., & Marker, T. (2000). Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems (Report No. DOT/FAA/AR-00/28). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93941

Reinhardt, John, David Blake, and Timothy Marker. Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems. Report no. DOT/FAA/AR-00/28. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93941.

Reinhardt, John, et al. Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/28, ROSA P. https://rosap.ntl.bts.gov/view/dot/93941.
Export RIS Citation Information. TY - Tech Report AU - Reinhardt, John AU - Blake, David AU - Marker, Timothy A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This report documents the test results of the testing conducted during the development of a minimum performance standard for aircraft cargo compartment gaseous fire suppression systems. It also includes the final version of the standard. The development work was performed in conjunction with the International Halon Replacement Working Group. AN - dot:93941 DA - 2000-09-01 ET - Final Report KW - Air cargo KW - Bulk cargo KW - Fires KW - Containers KW - Aerosols KW - Halon 1301 LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/28 TI - Development of a Minimum Performance Standard for Aircraft Cargo Compartment Gaseous Fire Suppression Systems M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93941 ER -
Corrosion and Corrosion Fatigue of Airframe Materials

Wei, Robert P

2000-07-01 | PDF

This report summarizes research performed under Grant 92-G-0006 and complementary programs sponsored by the Air Force Office of Scientific Research under Grants F49620-96-1-0245 and F49620-98-1-0198. The objectives of these programs are (1) the development of a basic understanding of the processes of localized corrosion and corrosion fatigue crack ...

10/13/2026

Title : Corrosion and Corrosion Fatigue of Airframe Materials Creator(s) : Wei, Robert P Corporate Creator(s) : Lehigh University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research;United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center; Published Date : 2000-07-01 Report Number : DOT/FAA/AR-00/22 URL : https://rosap.ntl.bts.gov/view/dot/93940
Wei, R. P. (2000). Corrosion and Corrosion Fatigue of Airframe Materials (Report No. DOT/FAA/AR-00/22). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93940

Wei, Robert P. Corrosion and Corrosion Fatigue of Airframe Materials. Report no. DOT/FAA/AR-00/22. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93940.

Wei, Robert P Corrosion and Corrosion Fatigue of Airframe Materials. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/22, ROSA P. https://rosap.ntl.bts.gov/view/dot/93940.
Export RIS Citation Information. TY - Tech Report AU - Wei, Robert P A2 - Lehigh University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research A3 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center AB - This report summarizes research performed under Grant 92-G-0006 and complementary programs sponsored by the Air Force Office of Scientific Research under Grants F49620-96-1-0245 and F49620-98-1-0198. The objectives of these programs are (1) the development of a basic understanding of the processes of localized corrosion and corrosion fatigue crack nucleation and growth in high strength aluminum alloys used in airframe construction, (2) the formulation of kinetic models for these elemental processes, and (3) the integration of these models into probabilistic models that can provide guidance in formulating methodologies for service-life prediction and airworthiness assessment. AN - dot:93940 DA - 2000-07-01 ET - Final Report KW - Aircraft KW - Corrosion KW - Mechanical fatigue KW - Failure LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/22 TI - Corrosion and Corrosion Fatigue of Airframe Materials M3 - Tech Report N1 - United States N1 - 92-G-0006 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93940 ER -
The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet

Cavage, William M.

2000-05-01 | PDF

This report documents a cost analysis of ground-based fuel tank inerting for the commercial fleet performed by a group of industry experts lead by an Federal Aviation Administration (FAA) representative. Ground-based inerting (GBI) consists of displacing most of the oxygen dissolved in the fuel with nitrogen by a process called fuel scrubbing, and ...

10/13/2026

Title : The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet Creator(s) : Cavage, William M. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2000-05-01 Report Number : DOT/FAA/AR-00/19 URL : https://rosap.ntl.bts.gov/view/dot/93939
Cavage, W. M. (2000). The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet (Report No. DOT/FAA/AR-00/19). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93939

Cavage, William M.. The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet. Report no. DOT/FAA/AR-00/19. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93939.

Cavage, William M. The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/19, ROSA P. https://rosap.ntl.bts.gov/view/dot/93939.
Export RIS Citation Information. TY - Tech Report AU - Cavage, William M. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This report documents a cost analysis of ground-based fuel tank inerting for the commercial fleet performed by a group of industry experts lead by an Federal Aviation Administration (FAA) representative. Ground-based inerting (GBI) consists of displacing most of the oxygen dissolved in the fuel with nitrogen by a process called fuel scrubbing, and displacing the air in the empty space (ullage) of the fuel tank, with nitrogen-enriched air (NEA) in a process called ullage washing. The cost analysis considers the cost of implementing and performing GBI for all US departures carrying more than 19 passengers. The cost of GBI for only departures of airplanes with heated center wing tanks (HCWTs) was also determined. Airplanes that have the air conditioning equipment, or packs, located below the center wing fuel tanks are considered to have heated center wing tanks. This analysis considered all nonrecurring and recurring costs of GBI at all major U.S. airports over 10 years, with a 3-year start-up period. The cost of modifying the aircraft to allow for GBI was not considered in this analysis. AN - dot:93939 DA - 2000-05-01 ET - Final Report KW - Fuel systems KW - Nitrogen KW - Costs KW - Inert gas shielded arc welding KW - Fuel scrubbing KW - Ullage washing LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/19 TI - The Cost of Implementing Ground-Based Fuel Tank Inerting in the Commercial Fleet M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93939 ER -
Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane

Dwyer, W

2000-04-01 | PDF

This document is the final report covering the results of a 3-year program entitled "Development of a Supplemental Inspection Document for SA226/SA227 Aircraft." The program focused on developing a supplemental inspection document (SID) for all variants of the SA226 and SA227 based on damage tolerance analysis techniques. The SA226 and SA227 were d ...

10/13/2026

Title : Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane Creator(s) : Dwyer, W Corporate Creator(s) : Fairchild Aerospace Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Associate Administrator for Civil Aviation Security, ACS-1;United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center; Published Date : 2000-04-01 Report Number : DOT/FAA/AR-00/18 URL : https://rosap.ntl.bts.gov/view/dot/93938
Dwyer, W. (2000). Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane (Report No. DOT/FAA/AR-00/18). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93938

Dwyer, W. Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane. Report no. DOT/FAA/AR-00/18. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000. https://rosap.ntl.bts.gov/view/dot/93938.

Dwyer, W Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2000, Report no. DOT/FAA/AR-00/18, ROSA P. https://rosap.ntl.bts.gov/view/dot/93938.
Export RIS Citation Information. TY - Tech Report AU - Dwyer, W A2 - Fairchild Aerospace A3 - United States. Department of Transportation. Federal Aviation Administration. Associate Administrator for Civil Aviation Security, ACS-1 A3 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center AB - This document is the final report covering the results of a 3-year program entitled "Development of a Supplemental Inspection Document for SA226/SA227 Aircraft." The program focused on developing a supplemental inspection document (SID) for all variants of the SA226 and SA227 based on damage tolerance analysis techniques. The SA226 and SA227 were designed and certified prior to the advent of modern damage tolerance analysis or FAR amendments, which require the aircraft structure to meet damage tolerance requirements. A major portion of this study consisted of collecting the data and performing the analysis necessary to establish an inspection program based on current damage tolerance methodology. Material and component tests, service experience, strain surveys, stress analysis, and fracture mechanics tools were all utilized to establish this program, which provides inspections and modifications necessary to help ensure the continued structural integrity of the airplane. These items were accomplished and the SID was developed. AN - dot:93938 DA - 2000-04-01 ET - Final Report KW - Airplanes KW - Cracking KW - Failure KW - Engineering tolerances KW - Inspection KW - Metro KW - Merlin LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000 SN - DOT/FAA/AR-00/18 TI - Development of Supplemental Inspection Report for the Fairchild Metro SA226 and SA227 Airplane M3 - Tech Report N1 - United States N1 - DTFA03-96-C-00044 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93938 ER -
Checkpoint Effectiveness and Efficiency Evaluation

Fobes, J. L. ;

Snyder, Michael D.

1999-10-01 | PDF

This document describes a method to measure the operational effectiveness and efficiency of airport security checkpoints. Evaluating these two factors begins with determining their Critical Operational Issues and Criteria as well as the accompanying Measures of Performance. Checklists are included for acquiring the basic information through observa ...

10/13/2026

Title : Checkpoint Effectiveness and Efficiency Evaluation Creator(s) : Fobes, J. L.;Snyder, Michael D.;Klock, Brenda A.; 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. Associate Administrator for Civil Aviation Security, ACS-1 Published Date : 1999-10-01 Report Number : DOT/FAA/AR-00/7 URL : https://rosap.ntl.bts.gov/view/dot/93937
Fobes, J. L., Snyder, M. D., & Klock, B. A. (1999). Checkpoint Effectiveness and Efficiency Evaluation (Report No. DOT/FAA/AR-00/7). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93937

Fobes, J. L., Michael D. Snyder, and Brenda A. Klock. Checkpoint Effectiveness and Efficiency Evaluation. Report no. DOT/FAA/AR-00/7. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999. https://rosap.ntl.bts.gov/view/dot/93937.

Fobes, J. L., et al. Checkpoint Effectiveness and Efficiency Evaluation. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999, Report no. DOT/FAA/AR-00/7, ROSA P. https://rosap.ntl.bts.gov/view/dot/93937.
Export RIS Citation Information. TY - Tech Report AU - Fobes, J. L. AU - Snyder, Michael D. AU - Klock, Brenda A. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Associate Administrator for Civil Aviation Security, ACS-1 AB - This document describes a method to measure the operational effectiveness and efficiency of airport security checkpoints. Evaluating these two factors begins with determining their Critical Operational Issues and Criteria as well as the accompanying Measures of Performance. Checklists are included for acquiring the basic information through observation of the checkpoint (directly or with video cameras) and Threat Image Projection data. AN - dot:93937 DA - 1999-10-01 KW - Aviation safety KW - Data collection KW - Image processing KW - Measurement KW - National security KW - Security checkpoints KW - Threats LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999 SN - DOT/FAA/AR-00/7 TI - Checkpoint Effectiveness and Efficiency Evaluation M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93937 ER -
Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation

Klock, Brenda A.

1999-11-01 | PDF

This document describes the project plan to evaluate usability and operator performance on the L3 Communications Corporation Explosive Detection System (EDS) eXaminer 3DXTM 6000. The 3DXTM 6000 uses Computed Tomography technology to produce simulated volumetric 3-D images of passenger baggage and highlight potential explosive threats. A human facto ...

10/13/2026

Title : Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation Creator(s) : Klock, Brenda A. 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. Associate Administrator for Civil Aviation Security, ACS-1 Published Date : 1999-11-01 Report Number : DOT/FAA/AR-00/02 URL : https://rosap.ntl.bts.gov/view/dot/93936
Klock, B. A. (1999). Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation (Report No. DOT/FAA/AR-00/02). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93936

Klock, Brenda A.. Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation. Report no. DOT/FAA/AR-00/02. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999. https://rosap.ntl.bts.gov/view/dot/93936.

Klock, Brenda A. Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999, Report no. DOT/FAA/AR-00/02, ROSA P. https://rosap.ntl.bts.gov/view/dot/93936.
Export RIS Citation Information. TY - Tech Report AU - Klock, Brenda A. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Associate Administrator for Civil Aviation Security, ACS-1 AB - This document describes the project plan to evaluate usability and operator performance on the L3 Communications Corporation Explosive Detection System (EDS) eXaminer 3DXTM 6000. The 3DXTM 6000 uses Computed Tomography technology to produce simulated volumetric 3-D images of passenger baggage and highlight potential explosive threats. A human factors evaluation will be conducted in Phase I on the usability (i.e., graphic user interface, image quality, and information display) of the system, as well as the consistency and readability of training materials and user's manuals. In Phase II, a laboratory test with five airport security screeners and 100 test bags (30 with simulant explosives and 70 with false alarm items) will be conducted to assess system performance. The probability of detection and of false alarms, the sensitivity measure d', the response bias measure c, and the time it takes operators to make a decision will be analyzed. AN - dot:93936 DA - 1999-11-01 ET - Final Report KW - Tomography KW - Explosives detectors KW - Detectors by object of detection KW - Human factors KW - Security LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999 SN - DOT/FAA/AR-00/02 TI - Project Plan: L3 3DX6000 EDS Usability and System Performance Evaluation M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93936 ER -
Screener Readiness Test Validation

Fobes, J. L. ;

Neiderman, Eric C.

1999-09-01 | PDF

The Screener Readiness Test was administered to 349 individuals at four major airports. Responses to verbal and image items were recorded and analyzed. Test items showed moderate difficulty and good reliability. The test was more difficult for those who were not native speakers of English but did not have adverse impact on racial or gender groups o ...

10/13/2026

Title : Screener Readiness Test Validation Creator(s) : Fobes, J. L.;Neiderman, Eric 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. Associate Administrator for Civil Aviation Security, ACS-1 Published Date : 1999-09-01 Report Number : DOT/FAA/AR-00/01 URL : https://rosap.ntl.bts.gov/view/dot/93935
Fobes, J. L., & Neiderman, E. C. (1999). Screener Readiness Test Validation (Report No. DOT/FAA/AR-00/01). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/93935

Fobes, J. L. and Eric C. Neiderman. Screener Readiness Test Validation. Report no. DOT/FAA/AR-00/01. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999. https://rosap.ntl.bts.gov/view/dot/93935.

Fobes, J. L., and Eric C. Neiderman Screener Readiness Test Validation. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1999, Report no. DOT/FAA/AR-00/01, ROSA P. https://rosap.ntl.bts.gov/view/dot/93935.
Export RIS Citation Information. TY - Tech Report AU - Fobes, J. L. AU - Neiderman, Eric C. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Associate Administrator for Civil Aviation Security, ACS-1 AB - The Screener Readiness Test was administered to 349 individuals at four major airports. Responses to verbal and image items were recorded and analyzed. Test items showed moderate difficulty and good reliability. The test was more difficult for those who were not native speakers of English but did not have adverse impact on racial or gender groups once this factor was controlled. A test structure and test scoring method is proposed that will allow valid and reliable assessment of initial screener readiness. AN - dot:93935 DA - 1999-09-01 ET - Final Report KW - Airport operations KW - Airports KW - Aviation safety KW - Baggage screening KW - Detectors KW - Security checkpoints KW - Security LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999 SN - DOT/FAA/AR-00/01 TI - Screener Readiness Test Validation M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/93935 ER -

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