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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FHWA Highway History Website Articles
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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.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-31
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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 (2021). Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 43, 10/25/2021 – 10/31/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/58665
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 43, 10/25/2021 – 10/31/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/58665.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 43, 10/25/2021 – 10/31/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58665.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-29
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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 (2021). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 5, Data Complete Through 10/29/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/58668
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. 5, Data Complete Through 10/29/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/58668.
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. 5, Data Complete Through 10/29/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58668.
This project aims to address the need for riders who use demand-responsive services, rural riders, and riders with disabilities to have equal access to the real-time trip planning technologies already available for fixed-route transit, as well as Transportation Network Companies. Fixed-route transit rider information has developed quickly in the la
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Butler, T., Wall, M., Meng, J., Craig, T., & Bailey, T. (2021). Phase 1 Performance Measurement and Evaluation Support Plan California Association for Coordinated Transportation ITS4US Deployment Project (Report No. FHWA-JPO-21-876). United States. Department of Transportation. Federal Highway Administration. https://doi.org/10.21949/1527540
Butler, Tamika, Mark Wall, Joshua Meng, Thomas Craig, and Taylor Bailey. Phase 1 Performance Measurement and Evaluation Support Plan California Association for Coordinated Transportation ITS4US Deployment Project. Report no. FHWA-JPO-21-876. United States. Department of Transportation. Federal Highway Administration, 2021. https://doi.org/10.21949/1527540.
Butler, Tamika, et al. Phase 1 Performance Measurement and Evaluation Support Plan California Association for Coordinated Transportation ITS4US Deployment Project. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-JPO-21-876, ROSA P. https://doi.org/10.21949/1527540.
The Atlanta Regional Commission Complete Trip - ITS4US Deployment project, Safe Trips in a Connected Transportation Network (ST-CTN), is leveraging innovative solutions, existing deployments, and collaboration to make a positive impact using transportation technology to support safety, mobility, sustainability, and accessibility. The ST-CTN concept
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Wakhisi, K., Roell, M., Okunieff, P., Smusz-Mengelkoch, N., Guensler, R., & Guin, A. (2021). Phase 1 Performance Measurement and Evaluation Support Plan (PMESP) - Atlanta Regional Commission ITS4US Deployment Project (Report No. FHWA-JPO-21-875). United States. Department of Transportation. Federal Highway Administration. https://doi.org/10.21949/1527556
Wakhisi, Kofi, Maria Roell, Polly Okunieff, Natalie Smusz-Mengelkoch, Randall Guensler, and Angshuman Guin. Phase 1 Performance Measurement and Evaluation Support Plan (PMESP) - Atlanta Regional Commission ITS4US Deployment Project. Report no. FHWA-JPO-21-875. United States. Department of Transportation. Federal Highway Administration, 2021. https://doi.org/10.21949/1527556.
Wakhisi, Kofi, et al. Phase 1 Performance Measurement and Evaluation Support Plan (PMESP) - Atlanta Regional Commission ITS4US Deployment Project. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-JPO-21-875, ROSA P. https://doi.org/10.21949/1527556.
The Atlanta Regional Commission Complete Trip - ITS4US Deployment project, Safe Trips in a Connected Transportation Network (ST-CTN), is leveraging innovative solutions, existing deployments, and collaboration to make a positive impact using transportation technology to support safety, mobility, sustainability, and accessibility. The ST-CTN concept
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Wakhisi, K., Roell, M., Okunieff, P., Smusz-Mengelkoch, N., Glueckert, T., Patel, P., Campbell, J., Davis, A., Hofelich, A., Wall, D., Guensler, R., & Guin, A. (2021). Phase 1 System Requirements Specification (SyRS) Atlanta Regional Commission ITS4US Deployment Project (Report No. FHWA-JPO-21-880). United States. Department of Transportation. Federal Highway Administration. https://doi.org/10.21949/1527539
Wakhisi, Kofi, Maria Roell, Polly Okunieff, Natalie Smusz-Mengelkoch, Tom Glueckert, Poonam Patel, and Jon Campbell, et al.. Phase 1 System Requirements Specification (SyRS) Atlanta Regional Commission ITS4US Deployment Project. Report no. FHWA-JPO-21-880. United States. Department of Transportation. Federal Highway Administration, 2021. https://doi.org/10.21949/1527539.
Wakhisi, Kofi, et al. Phase 1 System Requirements Specification (SyRS) Atlanta Regional Commission ITS4US Deployment Project. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-JPO-21-880, ROSA P. https://doi.org/10.21949/1527539.
This document presents the System Requirements Specification (SyRS) for the University of Washington (UW) ITS4US Deployment Project, The Transportation Data Equity Initiative (TDEI), which is being performed as part of the U.S. Department of Transportation’s (USDOT) Complete Trip—ITS4US Deployment Program. This deployment project aims to develop an
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Caspi, A., Hallenbeck, M., Flanigan, E., Jensen, M., Marecek, A., Danczyk, A., & Leao, G. (2021). Phase 1 System Requirements Specification (SyRS)— University of Washington ITS4US Deployment Project (Report No. FHWA-JPO-21-884). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/66781
Caspi, Anat, Mark Hallenbeck, Erin Flanigan, Mark Jensen, Alice Marecek, Adam Danczyk, and Guilherme Leao. Phase 1 System Requirements Specification (SyRS)— University of Washington ITS4US Deployment Project. Report no. FHWA-JPO-21-884. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021. https://rosap.ntl.bts.gov/view/dot/66781.
Caspi, Anat, et al. Phase 1 System Requirements Specification (SyRS)— University of Washington ITS4US Deployment Project. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2021, Report no. FHWA-JPO-21-884, ROSA P. https://rosap.ntl.bts.gov/view/dot/66781.
The California Association for Coordinated Transportation (CALACT) ITS4US project aims to address the need for riders who use demand-responsive services, rural riders, and riders with disabilities to have equal access to real-time trip planning technologies already available for fixed-route transit and by Transportation Network Companies. The Syste
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Craig, T., Englert, V., & Shippy, W. (2021). Phase 1 System Requirements Specification (SyRS) CALACT ITS4US Deployment Project (Report No. FHWA-JPO-21-881). United States. Department of Transportation. Federal Highway Administration. https://doi.org/10.21949/1527538
Craig, Thomas, Vyki Englert, and Weston Shippy. Phase 1 System Requirements Specification (SyRS) CALACT ITS4US Deployment Project. Report no. FHWA-JPO-21-881. United States. Department of Transportation. Federal Highway Administration, 2021. https://doi.org/10.21949/1527538.
Craig, Thomas, et al. Phase 1 System Requirements Specification (SyRS) CALACT ITS4US Deployment Project. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-JPO-21-881, ROSA P. https://doi.org/10.21949/1527538.
This document discusses the System Requirements Specification (SyRS) for the University of Washington (UW) ITS4US Deployment Project, which is developing and deploying the Transportation Data Equity Initiative (TDEI). This project currently is in Phase 1, planning and systems engineering development, in which the preliminary idea is developed into
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Caspi, A., Halenbeck, M., Flanigan, E., Jensen, M., Marecek, A., Danczyk, A., & Leao, G. (2021). Phase 1 System Requirements Specification (SyRS) University of Washington ITS4US Deployment Project (Report No. FHWA-JPO-21-884). United States. Department of Transportation. Federal Highway Administration. https://doi.org/10.21949/1527543
Caspi, Anat, Mark Halenbeck, Erin Flanigan, Mark Jensen, Alice Marecek, Adam Danczyk, and Guilherme Leao. Phase 1 System Requirements Specification (SyRS) University of Washington ITS4US Deployment Project. Report no. FHWA-JPO-21-884. United States. Department of Transportation. Federal Highway Administration, 2021. https://doi.org/10.21949/1527543.
Caspi, Anat, et al. Phase 1 System Requirements Specification (SyRS) University of Washington ITS4US Deployment Project. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-JPO-21-884, ROSA P. https://doi.org/10.21949/1527543.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-24
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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 (2021). Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 42, 10/18/2021 – 10/24/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/58498
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 42, 10/18/2021 – 10/24/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/58498.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Special Issue - Weekly Traffic Volume Report: Interstate Travel for Week No. 42, 10/18/2021 – 10/24/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58498.
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