United States. Department of Transportation. Federal Highway Administration
2020-09-15
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Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. Highway agencies use specifications to achieve acceptable in-place density on their asphalt pavements. Density acceptance
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United States. Department of Transportation. Federal Highway Administration (2020). Enhanced In-Place Density: Accurate Measurements Help To Ensure Adequate Density (Report No. FHWA-HIF-22-063). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/77874
United States. Department of Transportation. Federal Highway Administration. Enhanced In-Place Density: Accurate Measurements Help To Ensure Adequate Density. Report no. FHWA-HIF-22-063. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/77874.
United States. Department of Transportation. Federal Highway Administration Enhanced In-Place Density: Accurate Measurements Help To Ensure Adequate Density. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-HIF-22-063, ROSA P. https://rosap.ntl.bts.gov/view/dot/77874.
United States. Department of Transportation. Federal Highway Administration
2020-09-15
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Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. There are a number of challenges to achieving desirable in-place density when placing asphalt mixtures. These obstacles a
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United States. Department of Transportation. Federal Highway Administration (2020). Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Material Challenges (Report No. FHWA-HIF-22-064). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/77875
United States. Department of Transportation. Federal Highway Administration. Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Material Challenges. Report no. FHWA-HIF-22-064. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/77875.
United States. Department of Transportation. Federal Highway Administration Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Material Challenges. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-HIF-22-064, ROSA P. https://rosap.ntl.bts.gov/view/dot/77875.
United States. Department of Transportation. Federal Highway Administration
2020-09-15
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PDF
Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. There are a number of challenges to achieving desirable in-place density when placing asphalt mixtures. These obstacles a
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United States. Department of Transportation. Federal Highway Administration (2020). Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Placement Challenges (Report No. FHWA-HIF-22-065). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/77876
United States. Department of Transportation. Federal Highway Administration. Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Placement Challenges. Report no. FHWA-HIF-22-065. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/77876.
United States. Department of Transportation. Federal Highway Administration Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Placement Challenges. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-HIF-22-065, ROSA P. https://rosap.ntl.bts.gov/view/dot/77876.
United States. Department of Transportation. Federal Highway Administration
2020-09-15
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PDF
Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. There are a number of challenges to achieving desirable in-place density when placing asphalt mixtures. A recent series o
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United States. Department of Transportation. Federal Highway Administration (2020). Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Potential Solutions (Report No. FHWA-HIF-22-066). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/77877
United States. Department of Transportation. Federal Highway Administration. Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Potential Solutions. Report no. FHWA-HIF-22-066. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/77877.
United States. Department of Transportation. Federal Highway Administration Enhanced In-Place Density: Obstacles to Achieving In-Place Density – Potential Solutions. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-HIF-22-066, ROSA P. https://rosap.ntl.bts.gov/view/dot/77877.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2020-09-13
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The Weekly Traffic Volume Report estimates the vehicle miles traveled (VMT) for interstate highways and how the total travel measured by VMT compares with travel that occurred in the same week of the previous year. The VMT is further split into passenger vehicle and truck components. The information gives new insights into the effect on traffic by
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2020). Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 37. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/54719
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 37. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020. https://rosap.ntl.bts.gov/view/dot/54719.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 37. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/54719.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2020-09-11
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The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2020). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 50; Data Complete Through 9/11/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/56433
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 50; Data Complete Through 9/11/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020. https://rosap.ntl.bts.gov/view/dot/56433.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 50; Data Complete Through 9/11/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/56433.
Federal Highway Administration (U.S.) (2020). Realty Digest Summer 2020: Volume 12, Number 1. Federal Highway Administration (U.S.). https://rosap.ntl.bts.gov/view/dot/53830
Federal Highway Administration (U.S.). Realty Digest Summer 2020: Volume 12, Number 1. Federal Highway Administration (U.S.), 2020. https://rosap.ntl.bts.gov/view/dot/53830.
Federal Highway Administration (U.S.) Realty Digest Summer 2020: Volume 12, Number 1. Federal Highway Administration (U.S.), 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/53830.
United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division
2020-09-09
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Recreational travel to the country’s public lands has been increasing for the past several years. This trend is expected to continue in both urban and rural areas in the coming decades, even following COVID-19 impacts. Increasing visitation means increased use of the infrastructure that gets visitors both to and through our national parks, forests,
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United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division (2020). Planning and Data-Sharing: Between Governments and Public Land Management Agencies. United States. Federal Highway Administration. Western Federal Lands Highway Division. https://rosap.ntl.bts.gov/view/dot/72452
United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division. Planning and Data-Sharing: Between Governments and Public Land Management Agencies. United States. Federal Highway Administration. Western Federal Lands Highway Division, 2020. https://rosap.ntl.bts.gov/view/dot/72452.
United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division Planning and Data-Sharing: Between Governments and Public Land Management Agencies. United States. Federal Highway Administration. Western Federal Lands Highway Division, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/72452.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2020-09-06
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The Weekly Traffic Volume Report estimates the vehicle miles traveled (VMT) for interstate highways and how the total travel measured by VMT compares with travel that occurred in the same week of the previous year. The VMT is further split into passenger vehicle and truck components. The information gives new insights into the effect on traffic by
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2020). Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 36. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/54718
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 36. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020. https://rosap.ntl.bts.gov/view/dot/54718.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 36. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/54718.
The Lake Tahoe region is a scenic area nestled between the California and Nevada border with a population of approximately 55,000 people. Persons who identify as Hispanic or Latino account for nearly 14 percent of the regional population. The region is also home to the Washoe Tribe of Nevada and California, which owns land and manages shorelines al
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United States. Federal Highway Administration (2020). Engaging Underserved Communities in Active Transportation Planning in the Lake Tahoe Region (Report No. FHWA-HEP-20-040). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62871
United States. Federal Highway Administration. Engaging Underserved Communities in Active Transportation Planning in the Lake Tahoe Region. Report no. FHWA-HEP-20-040. United States. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/62871.
United States. Federal Highway Administration Engaging Underserved Communities in Active Transportation Planning in the Lake Tahoe Region. United States. Federal Highway Administration, 2020, Report no. FHWA-HEP-20-040, ROSA P. https://rosap.ntl.bts.gov/view/dot/62871.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2020-09-04
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The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2020). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 49; Data Complete Through 9/4/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/56432
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 49; Data Complete Through 9/4/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020. https://rosap.ntl.bts.gov/view/dot/56432.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 49; Data Complete Through 9/4/2020. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/56432.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2020-09-03
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This digest shares the latest information from a range of Federal and non-Federal sources, addressing transportation and its relationship to the human environment. Through this information exchange, FHWA hopes to foster dialogue at all levels and continue to further the state of the practice on these important topics in support of safety; infrastru
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty (2020). Human Environment Digest: September 3 2020. United States. Federal Highway Administration. Office of Planning, Environment, and Realty. https://rosap.ntl.bts.gov/view/dot/54964
United States. Federal Highway Administration. Office of Planning, Environment, and Realty. Human Environment Digest: September 3 2020. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2020. https://rosap.ntl.bts.gov/view/dot/54964.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty Human Environment Digest: September 3 2020. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/54964.
pathVu is developing AccessPath, a pedestrian wayfinding app tailored towards wheelchair users and people with visual impairments. Typical pedestrian wayfinding apps do not use the sidewalk network to provide navigation, nor do they know the quality of the routes that they direct their users. In addition, these apps are not user-friendly for people
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Sinagra, E. (2020). Development of AccessPath: A pedestrian wayfinding tool tailored towards wheelchair users and individuals with visual impairments; Phase 1 Final Report (Report No. FHWA-JPO-21-846). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/55240
Sinagra, Eric. Development of AccessPath: A pedestrian wayfinding tool tailored towards wheelchair users and individuals with visual impairments; Phase 1 Final Report. Report no. FHWA-JPO-21-846. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/55240.
Sinagra, Eric Development of AccessPath: A pedestrian wayfinding tool tailored towards wheelchair users and individuals with visual impairments; Phase 1 Final Report. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-JPO-21-846, ROSA P. https://rosap.ntl.bts.gov/view/dot/55240.
United States. Department of Transportation. Federal Highway Administration
2020-09-01
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Many steel bridges are currently in need of maintenance. Maintenance operations may range from small component replacement jobs to major maintenance activities including repainting. Many steel bridges in the highway system are coated with paint that contains toxic heavy metal pigments (e.g., lead, chromate) in varying concentrations. These metals c
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United States. Department of Transportation. Federal Highway Administration (2020). FHWA Bridge Coatings Technical Note: Personnel Protection During Bridge Paint Removal. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/88552
United States. Department of Transportation. Federal Highway Administration. FHWA Bridge Coatings Technical Note: Personnel Protection During Bridge Paint Removal. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/88552.
United States. Department of Transportation. Federal Highway Administration FHWA Bridge Coatings Technical Note: Personnel Protection During Bridge Paint Removal. United States. Department of Transportation. Federal Highway Administration, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/88552.
Increased roadway traffic demands have led to a notable increase of large diameter tunnel boring machine-driven tunnels across the world. The technological advancements of tunnel boring machines have made them a viable technical option for tunneling in difficult conditions in urban environments at ever increasing diameters. Such tunnels utilize pre
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Bergeson, W., Wisniewski, J., Vardakos, S., Mooney, M. A., & Nitschke, A. (2020). Precast Concrete Segmental Liners for Large Diameter Road Tunnels - Literature Survey and Synthesis (Report No. FHWA-HIF-20-035). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/56194
Bergeson, William, John Wisniewski, Sotirios Vardakos, Michael A. Mooney, and Axel Nitschke. Precast Concrete Segmental Liners for Large Diameter Road Tunnels - Literature Survey and Synthesis. Report no. FHWA-HIF-20-035. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/56194.
Bergeson, William, et al. Precast Concrete Segmental Liners for Large Diameter Road Tunnels - Literature Survey and Synthesis. United States. Department of Transportation. Federal Highway Administration, 2020, Report no. FHWA-HIF-20-035, ROSA P. https://rosap.ntl.bts.gov/view/dot/56194.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2020-09-01
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The Regional Integrated Transportation Information System (RITIS) is an automated fusion and archiving system of real-time traffic, incident, and weather data obtained from agencies and communicated through dashboards and visual analytic tools. RITIS is a product of the Center for Advanced Transportation Technology Laboratory (CATTLab) at the Unive
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United States. Department of Transportation. Federal Highway Administration. Office of Operations (2020). RITIS: A Probe-data Source for Enhancing Operations and Planning Capabilities (Report No. FHWA-HOP-20-044). United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/55720
United States. Department of Transportation. Federal Highway Administration. Office of Operations. RITIS: A Probe-data Source for Enhancing Operations and Planning Capabilities. Report no. FHWA-HOP-20-044. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2020. https://rosap.ntl.bts.gov/view/dot/55720.
United States. Department of Transportation. Federal Highway Administration. Office of Operations RITIS: A Probe-data Source for Enhancing Operations and Planning Capabilities. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2020, Report no. FHWA-HOP-20-044, ROSA P. https://rosap.ntl.bts.gov/view/dot/55720.
The GIS in Transportation team publishes quarterly newsletters to share information about significant geospatial transportation news, events, and applications. Each issue highlights a specific transportation agency's application of GIS or geospatial data and technology.
United States. Federal Highway Administration (2020). GIS in Transportation: Fall 2020. United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/56297
United States. Federal Highway Administration. GIS in Transportation: Fall 2020. United States. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/56297.
United States. Federal Highway Administration GIS in Transportation: Fall 2020. United States. Federal Highway Administration, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/56297.
Over the past 10 to 15 yr, the use of high-friction surface treatments (HFSTs) as a safety countermeasure has grown exponentially. HFSTs are pavement-surface treatments that restore or enhance pavement friction at locations with high friction demand, such as curves, ramps, and intersection approaches. While the crash-reduction benefits of HFSTs hav
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Merritt, D. K., Lyon, C., Persaud, B., & Torres, H. N. (2020). Developing Crash-Modification Factors for High-Friction Surface Treatments (Report No. FHWA-HRT-20-061). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/54072
Merritt, David K., Craig Lyon, Bhagwant Persaud, and Helga N. Torres. Developing Crash-Modification Factors for High-Friction Surface Treatments. Report no. FHWA-HRT-20-061. United States. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/54072.
Merritt, David K., et al. Developing Crash-Modification Factors for High-Friction Surface Treatments. United States. Federal Highway Administration, 2020, Report no. FHWA-HRT-20-061, ROSA P. https://rosap.ntl.bts.gov/view/dot/54072.
United States. Department of Transportation. Federal Highway Administration
2020-09-01
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PEL is a valuable tool for creating efficiencies in the transportation project development process that supports agencies’ efforts to accelerate project delivery. PEL represents a collaborative and integrated approach to transportation decision-making that considers benefits and impacts of proposed transportation system improvements to the environm
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United States. Department of Transportation. Federal Highway Administration (2020). Planning and Environment Linkages (PEL) Hypothetical Case Study: Planning Analyses. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/63493
United States. Department of Transportation. Federal Highway Administration. Planning and Environment Linkages (PEL) Hypothetical Case Study: Planning Analyses. United States. Department of Transportation. Federal Highway Administration, 2020. https://rosap.ntl.bts.gov/view/dot/63493.
United States. Department of Transportation. Federal Highway Administration Planning and Environment Linkages (PEL) Hypothetical Case Study: Planning Analyses. United States. Department of Transportation. Federal Highway Administration, 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/63493.
This study evaluated the performance of four coating systems applied on chloride-contaminated steel substrates. The purpose of the study was to identify coating systems that can provide extended service life for steel bridges with minimal surface preparation at a much reduced cost. The study helps estimate the amount of chloride contamination coati
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Supporting Files
Liu, R., & Runion, A. (2020). Coating Performance on Existing Steel Bridge Superstructures (Report No. FHWA-HRT-20-065). Federal Highway Administration (U.S.). https://rosap.ntl.bts.gov/view/dot/51754
Liu, R. and A. Runion. Coating Performance on Existing Steel Bridge Superstructures. Report no. FHWA-HRT-20-065. Federal Highway Administration (U.S.), 2020. https://rosap.ntl.bts.gov/view/dot/51754.
Liu, R., and A. Runion Coating Performance on Existing Steel Bridge Superstructures. Federal Highway Administration (U.S.), 2020, Report no. FHWA-HRT-20-065, ROSA P. https://rosap.ntl.bts.gov/view/dot/51754.
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