Concrete overlays leverage the investment already made in the existing pavement structure while potentially reducing the need for significant preservation activities and reducing lane closure durations. This case study summarizes the design, construction, and performance of bonded and unbonded concrete overlays on existing continuously reinforced c
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Tayabji, S. D. (2021). Concrete Overlay: Virginia US 58: Concrete on Continuously Reinforced Concrete (CRC)–Bonded and Unbonded [case study] (Report No. FHWA-HIF-22-006). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62668
Tayabji, Shiraz D.. Concrete Overlay: Virginia US 58: Concrete on Continuously Reinforced Concrete (CRC)–Bonded and Unbonded [case study]. Report no. FHWA-HIF-22-006. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/62668.
Tayabji, Shiraz D. Concrete Overlay: Virginia US 58: Concrete on Continuously Reinforced Concrete (CRC)–Bonded and Unbonded [case study]. United States. Federal Highway Administration, 2021, Report no. FHWA-HIF-22-006, ROSA P. https://rosap.ntl.bts.gov/view/dot/62668.
This brief summarizes an evaluation of the Federal Highway Administration's (FHWA's) investment in the truck platooning research project titled "Assessing the Feasibility of Deploying Partial Automation for Truck Platooning." This research project included two complementary subprojects, titled "Partial Automation for Truck Platooning" (PATP) and "D
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Foreman, C., Keen, M., Petrella, M., & Plotnick, S. (2021). FHWA Research and Technology Evaluation TechBrief: Truck Platooning (Report No. FHWA-HRT-22-007). United States. Federal Highway Administration. Research and Technology Evaluation. https://rosap.ntl.bts.gov/view/dot/60195
Foreman, Christina, Matthew Keen, Margaret Petrella, and Sarah Plotnick. FHWA Research and Technology Evaluation TechBrief: Truck Platooning. Report no. FHWA-HRT-22-007. United States. Federal Highway Administration. Research and Technology Evaluation, 2021. https://rosap.ntl.bts.gov/view/dot/60195.
Foreman, Christina, et al. FHWA Research and Technology Evaluation TechBrief: Truck Platooning. United States. Federal Highway Administration. Research and Technology Evaluation, 2021, Report no. FHWA-HRT-22-007, ROSA P. https://rosap.ntl.bts.gov/view/dot/60195.
This report summarizes the key findings of the 2020 Intelligent Transportation Systems (ITS) Deployment Tracking Survey (DTS). Since 1997, the ITS Joint Program Office (JPO) has used the DTS on an ongoing basis to collect information about ITS deployment in metropolitan areas across the United States by surveying state and local transportation agen
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Chajka-Cadin, L., Petrella, M., Plotnick, S., & Roycroft, C. (2021). Intelligent Transportation Systems Deployment Tracking Survey: 2020 Key Findings (Report No. FHWA-JPO-21-890). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/59824
Chajka-Cadin, Lora, Margaret Petrella, Sarah Plotnick, and Claire Roycroft. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Key Findings. Report no. FHWA-JPO-21-890. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021. https://rosap.ntl.bts.gov/view/dot/59824.
Chajka-Cadin, Lora, et al. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Key Findings. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021, Report no. FHWA-JPO-21-890, ROSA P. https://rosap.ntl.bts.gov/view/dot/59824.
Traditional traffic counts have long been utilized by U.S. DOT, the states, and MPOs to determine volumes of traffic. Recent developments in connected technologies have provided the potential for probe-based, or passive, measurement of traffic volumes that combines information on specific vehicles and advanced analytics algorithms to estimate AADT
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Krile, R., & Slone, E. (2021). Evaluating Two Different Traffic Data Methods Based on Data Observed, Analysis of Provided Data – Final Report A (Report No. FHWA-PL-021-040). United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/64901
Krile, Robert and Elizabeth Slone. Evaluating Two Different Traffic Data Methods Based on Data Observed, Analysis of Provided Data – Final Report A. Report no. FHWA-PL-021-040. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/64901.
Krile, Robert, and Elizabeth Slone Evaluating Two Different Traffic Data Methods Based on Data Observed, Analysis of Provided Data – Final Report A. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, Report no. FHWA-PL-021-040, ROSA P. https://rosap.ntl.bts.gov/view/dot/64901.
Traffic management systems (TMSs) and their operating centers, traffic management centers, support real-time and offline functions, services, actions, and activities—as well as related tasks and decisions (e.g., administrative actions and condition reports). In this context, decision-support tools (DSTs) are not generally used as standalone solutio
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Miller, K., Horner, J., Adler, J., & Sanchez, R. (2021). Decision Support for Traffic Management Systems - Current Practices (Report No. FHWA-HRT-21-108). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/59814
Miller, Kevin, John Horner, Jeff Adler, and Robert Sanchez. Decision Support for Traffic Management Systems - Current Practices. Report no. FHWA-HRT-21-108. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/59814.
Miller, Kevin, et al. Decision Support for Traffic Management Systems - Current Practices. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-108, ROSA P. https://rosap.ntl.bts.gov/view/dot/59814.
This report summarizes the Transit Management Survey findings of the 2020 Intelligent Transportation Systems (ITS) Deployment Tracking Surveys (DTS). Since 1997, the ITS Joint Program Office (JPO) has used the DTS on an ongoing basis to collect information about ITS deployment in metropolitan areas across the United States by surveying state and lo
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Chajka-Cadin, L., Petrella, M., Plotnick, S., & Roycroft, C. (2021). Intelligent Transportation Systems Deployment Tracking Survey: 2020 Transit Findings (Report No. FHWA-JPO-21-893). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/60578
Chajka-Cadin, Lora, Margaret Petrella, Sarah Plotnick, and Claire Roycroft. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Transit Findings. Report no. FHWA-JPO-21-893. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021. https://rosap.ntl.bts.gov/view/dot/60578.
Chajka-Cadin, Lora, et al. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Transit Findings. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021, Report no. FHWA-JPO-21-893, ROSA P. https://rosap.ntl.bts.gov/view/dot/60578.
This is one of five case studies highlighting FHWA’s Every Day Counts initiative known as Targeted Overlay Pavement Solutions (TOPS). TOPS integrates innovative overlay procedures into practices to improve performance, lessen traffic impacts, and reduce the cost of pavement ownership. The New Jersey Department of Transportation (NJDOT) specifies hi
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United States. Federal Highway Administration (2021). High-Performance Thin Overlays New Jersey Department of Transportation [case study] (Report No. FHWA-HIF-22-010). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62724
United States. Federal Highway Administration. High-Performance Thin Overlays New Jersey Department of Transportation [case study]. Report no. FHWA-HIF-22-010. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/62724.
United States. Federal Highway Administration High-Performance Thin Overlays New Jersey Department of Transportation [case study]. United States. Federal Highway Administration, 2021, Report no. FHWA-HIF-22-010, ROSA P. https://rosap.ntl.bts.gov/view/dot/62724.
This is one of five case studies highlighting FHWA’s Every Day Counts initiative known as Targeted Overlay Pavement Solutions (TOPS). The purpose of TOPS is to integrate innovative overlay procedures into practices to improve performance, lessen traffic impacts, and reduce the cost of pavement ownership. Highly modified asphalt (HiMA) mixtures cont
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United States. Federal Highway Administration (2021). Highly Modified Asphalt Florida Department of Transportation [case study] (Report No. FHWA-HIF-22-015). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62722
United States. Federal Highway Administration. Highly Modified Asphalt Florida Department of Transportation [case study]. Report no. FHWA-HIF-22-015. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/62722.
United States. Federal Highway Administration Highly Modified Asphalt Florida Department of Transportation [case study]. United States. Federal Highway Administration, 2021, Report no. FHWA-HIF-22-015, ROSA P. https://rosap.ntl.bts.gov/view/dot/62722.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-11-01
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Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjuste
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2021). Traffic Volume Trends: November 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/61046
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Traffic Volume Trends: November 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/61046.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Traffic Volume Trends: November 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/61046.
Lightweight concrete has been used successfully for the construction of bridges since soon after commercial production of lightweight aggregate began in the United States in 1920. Design provisions for lightweight concrete have been provided in AASHTO specifications for over 35 years. However, the material is not commonly used for bridge constructi
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Castrodale, R. (2021). Lightweight Concrete Bridge Design Primer (Report No. FHWA-HIF-19-067). United States. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/72984
Castrodale, Reid. Lightweight Concrete Bridge Design Primer. Report no. FHWA-HIF-19-067. United States. Federal Highway Administration. Office of Bridges and Structures, 2021. https://rosap.ntl.bts.gov/view/dot/72984.
Castrodale, Reid Lightweight Concrete Bridge Design Primer. United States. Federal Highway Administration. Office of Bridges and Structures, 2021, Report no. FHWA-HIF-19-067, ROSA P. https://rosap.ntl.bts.gov/view/dot/72984.
2021-11-01
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Until the 1960s, efforts to make highways safer had focused on two of the three keys in highway crashes: the road and the driver. The third element was the motor vehicle. For decades, the auto industry had supported efforts to make roads safer and drivers more skilled, while making vehicles bigger, more powerful, and faster. With a product to sell,
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Weingroff, R. F. (2021). A Moment in Time: Highway Safety Breakthrough. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/74843
Weingroff, Richard F.. A Moment in Time: Highway Safety Breakthrough. United States. Department of Transportation. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/74843.
Weingroff, Richard F. A Moment in Time: Highway Safety Breakthrough. United States. Department of Transportation. Federal Highway Administration, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/74843.
Unbonded precast concrete overlays leverage the investment already made in the existing pavement structure while potentially reducing the need for significant preservation activities and reducing lane closure durations. This case study summarizes the design, construction, and performance of an unbonded precast concrete overlay of an existing jointe
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Tayabji, S. D. (2021). Concrete Overlay: Florida US 92: Precast Concrete on Concrete–Unbonded [case study] (Report No. FHWA-HIF-22-007). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62739
Tayabji, Shiraz D.. Concrete Overlay: Florida US 92: Precast Concrete on Concrete–Unbonded [case study]. Report no. FHWA-HIF-22-007. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/62739.
Tayabji, Shiraz D. Concrete Overlay: Florida US 92: Precast Concrete on Concrete–Unbonded [case study]. United States. Federal Highway Administration, 2021, Report no. FHWA-HIF-22-007, ROSA P. https://rosap.ntl.bts.gov/view/dot/62739.
Continuously reinforced concrete (CRC) overlays leverage the investment already made in the existing pavement structure while potentially reducing the need for significant preservation activities and reducing lane closure durations. This case study summarizes the design, construction, and performance of an unbonded CRC overlay of an existing jointe
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Tayabji, S. D. (2021). Concrete Overlay: Arkansas I-40: Continuously Reinforced Concrete (CRC) on Concrete–Unbonded [case study] (Report No. FHWA-HIF-22-005). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/62669
Tayabji, Shiraz D.. Concrete Overlay: Arkansas I-40: Continuously Reinforced Concrete (CRC) on Concrete–Unbonded [case study]. Report no. FHWA-HIF-22-005. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/62669.
Tayabji, Shiraz D. Concrete Overlay: Arkansas I-40: Continuously Reinforced Concrete (CRC) on Concrete–Unbonded [case study]. United States. Federal Highway Administration, 2021, Report no. FHWA-HIF-22-005, ROSA P. https://rosap.ntl.bts.gov/view/dot/62669.
This report summarizes the Freeway Management Survey findings of the 2020 Intelligent Transportation Systems (ITS) Deployment Tracking Surveys (DTS). Since 1997, the ITS Joint Program Office (JPO) has used the DTS on an ongoing basis to collect information about ITS deployment in metropolitan areas across the United States by surveying state and lo
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Chajka-Cadin, L., Petrella, M., Plotnick, S., & Roycroft, C. (2021). Intelligent Transportation Systems Deployment Tracking Survey: 2020 Freeway Findings (Report No. FHWA-JPO-21-891). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/60122
Chajka-Cadin, Lora, Margaret Petrella, Sarah Plotnick, and Claire Roycroft. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Freeway Findings. Report no. FHWA-JPO-21-891. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021. https://rosap.ntl.bts.gov/view/dot/60122.
Chajka-Cadin, Lora, et al. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Freeway Findings. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021, Report no. FHWA-JPO-21-891, ROSA P. https://rosap.ntl.bts.gov/view/dot/60122.
This report summarizes the Arterial Management Survey findings of the 2020 Intelligent Transportation Systems (ITS) Deployment Tracking Surveys (DTS). Since 1997, the ITS Joint Program Office (JPO) has used the DTS on an ongoing basis to collect information about ITS deployment in metropolitan areas across the United States by surveying state and l
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Chajka-Cadin, L., Petrella, M., Plotnick, S., & Roycroft, C. (2021). Intelligent Transportation Systems Deployment Tracking Survey: 2020 Arterial Findings (Report No. FHWA-JPO-21-892). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/60579
Chajka-Cadin, Lora, Margaret Petrella, Sarah Plotnick, and Claire Roycroft. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Arterial Findings. Report no. FHWA-JPO-21-892. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021. https://rosap.ntl.bts.gov/view/dot/60579.
Chajka-Cadin, Lora, et al. Intelligent Transportation Systems Deployment Tracking Survey: 2020 Arterial Findings. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021, Report no. FHWA-JPO-21-892, ROSA P. https://rosap.ntl.bts.gov/view/dot/60579.
This document is a summary report of the Long-Term Bridge Performance (LTBP) Program’s data collection workshop held from February 25, 2021, through March 18, 2021.
Zobel, R. (2021). Summary Report: Long-Term Bridge Performance Program Data Collection Workshop (Report No. FHWA-HRT-22-015). United States. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/59138
Zobel, Robert. Summary Report: Long-Term Bridge Performance Program Data Collection Workshop. Report no. FHWA-HRT-22-015. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2021. https://rosap.ntl.bts.gov/view/dot/59138.
Zobel, Robert Summary Report: Long-Term Bridge Performance Program Data Collection Workshop. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2021, Report no. FHWA-HRT-22-015, ROSA P. https://rosap.ntl.bts.gov/view/dot/59138.
This Ancillary Structures Inspection Reference Manual addresses inspection and maintenance issues related to a wide range of ancillary highway structures, with a focus on steel and aluminum structures. It provides inspection, maintenance and management personnel with the basic information they may need to manage and implement an ancillary structure
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Doughty, W., Roy, G., Thorkildsen, E. T., & Demski, T. (2021). Ancillary Structures Inspection Reference Manual (Report No. FHWA-NHI-20-999). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/72956
Doughty, William, Gregory Roy, Eric T. Thorkildsen, and Todd Demski. Ancillary Structures Inspection Reference Manual. Report no. FHWA-NHI-20-999. United States. Department of Transportation. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/72956.
Doughty, William, et al. Ancillary Structures Inspection Reference Manual. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-NHI-20-999, ROSA P. https://rosap.ntl.bts.gov/view/dot/72956.
This document summarizes how the United States Bureau of Reclamation (Reclamation) Sedimentation and River Hydraulics – Two Dimension (SRH-2D) software performed in the two-dimensional (2D) modeling benchmark tests developed by the United Kingdom's (UK) Joint Defra (Department for Environmental Food and Rural Affairs) Environment Agency. These test
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Kramer, C. (2021). Benchmarking of SRH-2D (Report No. FHWA-RC-21-0006). United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development. https://rosap.ntl.bts.gov/view/dot/59940
Kramer, Casey. Benchmarking of SRH-2D. Report no. FHWA-RC-21-0006. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2021. https://rosap.ntl.bts.gov/view/dot/59940.
Kramer, Casey Benchmarking of SRH-2D. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2021, Report no. FHWA-RC-21-0006, ROSA P. https://rosap.ntl.bts.gov/view/dot/59940.
The ISTD is an advanced system designed by the hydraulics research team at the Turner-Fairbank Highway Research Center to measure the erosion resistance of fine-grained, cohesive soils directly in the field. It features an innovative erosion head that, when inserted into a standard drill casing, can direct a horizontal radial water flow across the
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United States. Federal Highway Administration (2021). In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Lowndesboro, AL (Report No. FHWA-HRT-22-005). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58308
United States. Federal Highway Administration. In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Lowndesboro, AL. Report no. FHWA-HRT-22-005. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58308.
United States. Federal Highway Administration In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Lowndesboro, AL. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-22-005, ROSA P. https://rosap.ntl.bts.gov/view/dot/58308.
Transportation is undergoing a period of significant change in the United States, evident by changes in transportation demand. Many factors influence transportation demand and in different ways. Some trends increase demand; some decrease demand; and others shift demand across modes, time of day, and geographies. Technological advances, coupled with
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United States. Federal Highway Administration (2021). The Transportation Future: Trends, Transportation, and Travel. United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/63182
United States. Federal Highway Administration. The Transportation Future: Trends, Transportation, and Travel. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/63182.
United States. Federal Highway Administration The Transportation Future: Trends, Transportation, and Travel. United States. Federal Highway Administration, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/63182.
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