The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations.
Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.
The current safety management program in Indiana uses a method based on aggregate crash data for conditions averaged over several-year periods with consideration of only major roadway features. This approach does not analyze the risk of crashes potentially affected by time-dependent conditions such as traffic control, operations, weather and their
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Tarko, A. P., Guo, Q., Pineda-Mendez, R., & Romero, M. A. (2021). Using Emerging and Extraordinary Data Sources To Improve Traffic Safety (Report No. FHWA/IN/JTRP-2021/04). Purdue University. Joint Transportation Research Program. https://rosap.ntl.bts.gov/view/dot/56470
Tarko, Andrew P., Qiming Guo, Raul Pineda-Mendez, and Mario A. Romero. Using Emerging and Extraordinary Data Sources To Improve Traffic Safety. Report no. FHWA/IN/JTRP-2021/04. Purdue University. Joint Transportation Research Program, 2021. https://rosap.ntl.bts.gov/view/dot/56470.
Tarko, Andrew P., et al. Using Emerging and Extraordinary Data Sources To Improve Traffic Safety. Purdue University. Joint Transportation Research Program, 2021, Report no. FHWA/IN/JTRP-2021/04, ROSA P. https://rosap.ntl.bts.gov/view/dot/56470.
The objective of this study was to evaluate the influence of internal curing and coarse aggregate type on concrete’s 28-day strength, as well as surface resistivity over time (at days 7, 14, 28, 56, 90, and 180). A total of 96 concrete mixtures were prepared to identify the effects of three coarse aggregate types, two water-to-cementitious (w/cm) r
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Milla, J., Rupnow, T., Saunders, W. J., & Cooper III, S. (2021). Influence of Internal Curing on Measured Resistivity (Report No. FHWA/LA.17/631). Louisiana. Department of Transportation and Development. https://rosap.ntl.bts.gov/view/dot/61228
Milla, Jose, Tyson Rupnow, William J Saunders, and Samuel Cooper III. Influence of Internal Curing on Measured Resistivity. Report no. FHWA/LA.17/631. Louisiana. Department of Transportation and Development, 2021. https://rosap.ntl.bts.gov/view/dot/61228.
Milla, Jose, et al. Influence of Internal Curing on Measured Resistivity. Louisiana. Department of Transportation and Development, 2021, Report no. FHWA/LA.17/631, ROSA P. https://rosap.ntl.bts.gov/view/dot/61228.
This is the second study of voter-approved transportation sales taxes in Los Angeles County performed by the UCLA Institute of Transportation Studies with support from the Haynes Foundation. The earlier study examined the history of the four half cent sales taxes enacted by voters in Los Angeles County between 1980 and 2016. The current study looke
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Wachs, M., Amberg, N., & Marks, J. S. (2021). Transportation Sales Taxes in Los Angeles: Lessons from Forty Years of Experience. University of California, Los Angeles. Institute of Transportation Studies. https://rosap.ntl.bts.gov/view/dot/86940
Wachs, Martin, Natalie Amberg, and Jeremy S. Marks. Transportation Sales Taxes in Los Angeles: Lessons from Forty Years of Experience. University of California, Los Angeles. Institute of Transportation Studies, 2021. https://rosap.ntl.bts.gov/view/dot/86940.
Wachs, Martin, et al. Transportation Sales Taxes in Los Angeles: Lessons from Forty Years of Experience. University of California, Los Angeles. Institute of Transportation Studies, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/86940.
The primary objective of this project was to investigate the load carrying capacity of bridges designed using the current Iowa Department of Transportation (DOT) secondary road standard bridge plans which are based on Load and Resistance Factor Design (LRFD) methods. Proper evaluation of the load carrying capacity requires the use of Load and Resis
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Moffitt, S. W., Peterson, J. E., Seager, P. D., Malloy, J. T., Pritchard, R. P., Muhle, S. M., & Moffitt, E. M. (2021). Load Ratings for Standard Bridges [Tech Transfer Summary] (Report No. IHRB Project TR-785). Iowa Highway Research Board. https://rosap.ntl.bts.gov/view/dot/79684
Moffitt, Stephen W., Jon E. Peterson, Payton D. Seager, Joseph T. Malloy, Ryan P. Pritchard, Shawn M. Muhle, and Emmett M. Moffitt. Load Ratings for Standard Bridges [Tech Transfer Summary]. Report no. IHRB Project TR-785. Iowa Highway Research Board, 2021. https://rosap.ntl.bts.gov/view/dot/79684.
Moffitt, Stephen W., et al. Load Ratings for Standard Bridges [Tech Transfer Summary]. Iowa Highway Research Board, 2021, Report no. IHRB Project TR-785, ROSA P. https://rosap.ntl.bts.gov/view/dot/79684.
Using experience from working on the Knight Autonomous Vehicle (AV) Initiative, Urbanism Next created this white paper to provide a foundation for public sector agencies to approach autonomous vehicle deployment and policy with a focus on equity. This report outlines ways that public agencies can identify community needs and shape deployment to ens
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Steckler, B., Howell, A., & Larco, N. (2021). A Framework for Shaping the Deployment of Autonomous Vehicles and Advancing Equity Outcomes. University of Oregon, Urbanism Next Center. https://rosap.ntl.bts.gov/view/dot/60206
Steckler, Becky, Amanda Howell, and Nico Larco. A Framework for Shaping the Deployment of Autonomous Vehicles and Advancing Equity Outcomes. University of Oregon, Urbanism Next Center, 2021. https://rosap.ntl.bts.gov/view/dot/60206.
Steckler, Becky, et al. A Framework for Shaping the Deployment of Autonomous Vehicles and Advancing Equity Outcomes. University of Oregon, Urbanism Next Center, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/60206.
This report documents the findings from SPR-4230 (Alternative Quality Assurance Methods for Compacted Subgrade). The main objective of SPR-4230 involved establishing performance-related quality assurance (QA) test methods for pavement subgrade construction. Because INDOT generally prefers specifying subgrade treatment type IBC (i.e., 14-in. cement
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Becker, P. J. (2021). Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Chemically Modified Subgrades (Report No. FHWA/IN/JTRP-2021/07). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317304
Becker, Peter J.. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Chemically Modified Subgrades. Report no. FHWA/IN/JTRP-2021/07. Purdue University. Joint Transportation Research Program, 2021. https://doi.org/10.5703/1288284317304.
Becker, Peter J. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Chemically Modified Subgrades. Purdue University. Joint Transportation Research Program, 2021, Report no. FHWA/IN/JTRP-2021/07, ROSA P. https://doi.org/10.5703/1288284317304.
In this report, seventeen Iowa secondary and primary bridge standards for three types of bridges are rated utilizing the Load and Resistance Factor methodology and AASHTO BrR Bridge Rating software, Version 6.8.4.3001. Load ratings in this report are in compliance with the AASHTO Manual for Bridge Evaluation, 3rd Edition, with Interim Specification
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Moffitt, S. W., Peterson, J. E., Seager, P. D., Malloy, J. T., Pritchard, R. P., Muhle, S. M., & Moffitt, E. M. (2021). Load Rating for Standard Bridges – Final Report for TR-785 (Report No. TR-785). Iowa Highway Research Board. https://rosap.ntl.bts.gov/view/dot/79683
Moffitt, Stephen W., Jon E. Peterson, Payton D. Seager, Joseph T. Malloy, Ryan P. Pritchard, Shawn M. Muhle, and Emmett M. Moffitt. Load Rating for Standard Bridges – Final Report for TR-785. Report no. TR-785. Iowa Highway Research Board, 2021. https://rosap.ntl.bts.gov/view/dot/79683.
Moffitt, Stephen W., et al. Load Rating for Standard Bridges – Final Report for TR-785. Iowa Highway Research Board, 2021, Report no. TR-785, ROSA P. https://rosap.ntl.bts.gov/view/dot/79683.
For bridges that are experiencing deterioration, action is needed to ensure the structural performance is adequate for the demands imposed. Innovate repair and strengthening techniques can provide a cost-effective means to extend the service lives of bridges efficiently and safely. The use of fiber reinforced polymer (FRP) systems for the repair an
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Pevey, J. M., Rich, W. B., Williams, C. S., & Frosch, R. J. (2021). Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer Systems: Volume 1 - Review of Current FRP Repair Systems and Application Methodologies (Report No. FHWA/IN/JTRP-2021/09). Indiana. Dept. of Transportation. https://doi.org/10.5703/1288284317309
Pevey, Jon M., William B. Rich, Christopher S. Williams, and Robert J. Frosch. Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer Systems: Volume 1 - Review of Current FRP Repair Systems and Application Methodologies. Report no. FHWA/IN/JTRP-2021/09. Indiana. Dept. of Transportation, 2021. https://doi.org/10.5703/1288284317309.
Pevey, Jon M., et al. Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer Systems: Volume 1 - Review of Current FRP Repair Systems and Application Methodologies. Indiana. Dept. of Transportation, 2021, Report no. FHWA/IN/JTRP-2021/09, ROSA P. https://doi.org/10.5703/1288284317309.
Louisiana Department of Transportation and Development (DOTD) requests that freeway lanes should not be closed for construction work during hours when capacity exceeds 1,309 pcphpl. It is not known how accurate this 1,309 pcphpl value is when compared to actual queuing related to real world work zones in Louisiana. This study provided literature on
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Codjoe, J., Thapa, R., & Osafo, Y. A. (2021). Evaluation of DOTD’s Existing Queue Estimation Procedures (Report No. FHWA/LA.17/642). Louisiana. Department of Transportation and Development. https://rosap.ntl.bts.gov/view/dot/58390
Codjoe, Julius, Raju Thapa, and Yaa Amanua Osafo. Evaluation of DOTD’s Existing Queue Estimation Procedures. Report no. FHWA/LA.17/642. Louisiana. Department of Transportation and Development, 2021. https://rosap.ntl.bts.gov/view/dot/58390.
Codjoe, Julius, et al. Evaluation of DOTD’s Existing Queue Estimation Procedures. Louisiana. Department of Transportation and Development, 2021, Report no. FHWA/LA.17/642, ROSA P. https://rosap.ntl.bts.gov/view/dot/58390.
This publication is a report of the transportation research, technology transfer, education, and training activities of the Louisiana Transportation Research Center for July 1, 2019–June 30, 2020. The center is sponsored jointly by the Louisiana Department of Transportation and Development and Louisiana State University.
Louisiana Transportation Research Center (2021). Louisiana Transportation Research Center: 2019–2020 Annual Report. Louisiana Transportation Research Center. https://rosap.ntl.bts.gov/view/dot/63069
Louisiana Transportation Research Center. Louisiana Transportation Research Center: 2019–2020 Annual Report. Louisiana Transportation Research Center, 2021. https://rosap.ntl.bts.gov/view/dot/63069.
Louisiana Transportation Research Center Louisiana Transportation Research Center: 2019–2020 Annual Report. Louisiana Transportation Research Center, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/63069.
The Michigan Department of Transportation (MDOT) hosted a virtual peer exchange meeting on October 13-15, 2020, to discuss topics related to transportation research goals, strategies and processes with other state DOTs. The meeting and the subsequent publication of this report fulfill the agency’s obligation to conduct a periodic peer exchange as p
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CTC & Associates LLC (2021). Michigan Department of Transportation Research Advisory Committee Region 3 Peer Exchange: October 13-15, 2020. Michigan. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/58651
CTC & Associates LLC. Michigan Department of Transportation Research Advisory Committee Region 3 Peer Exchange: October 13-15, 2020. Michigan. Dept. of Transportation, 2021. https://rosap.ntl.bts.gov/view/dot/58651.
CTC & Associates LLC Michigan Department of Transportation Research Advisory Committee Region 3 Peer Exchange: October 13-15, 2020. Michigan. Dept. of Transportation, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58651.
This report describes a methodology for demand estimate through the improvement of load distribution factors in reinforced concrete flat-slab and T-beam bridges. The proposed distribution factors are supported on three-dimensional (3D) Finite Element(FE) analysis tools. The Conventional Load Rating (CLR) method currently in use by INDOT relies on a
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Ravazdezh, F., Ramirez, J. A., & Haikal, G. (2021). Improved Live Load Distribution Factors for Use in Load Rating of Older Slab and T-Beam Reinforced Concrete Bridges (Report No. FHWA/IN/JTRP-2021/06). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317303
Ravazdezh, Faezeh, Julio A. Ramirez, and Ghadir Haikal. Improved Live Load Distribution Factors for Use in Load Rating of Older Slab and T-Beam Reinforced Concrete Bridges. Report no. FHWA/IN/JTRP-2021/06. Purdue University. Joint Transportation Research Program, 2021. https://doi.org/10.5703/1288284317303.
Ravazdezh, Faezeh, et al. Improved Live Load Distribution Factors for Use in Load Rating of Older Slab and T-Beam Reinforced Concrete Bridges. Purdue University. Joint Transportation Research Program, 2021, Report no. FHWA/IN/JTRP-2021/06, ROSA P. https://doi.org/10.5703/1288284317303.
The measurement of gas flow rates is of great importance in a wide range of modern technologies. This paper introduces a simple, yet accurate technique for in-house calibration of gas FMs (mass and volumetric) even under harsh environmental conditions such as encountered during field measurement campaigns. The method requires only readily available
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Trueblood, M., Schmid, O., Altese, N., Hurst, C. J., Liu, W., Gelles, T., Achterberg, S., Whitefield, P. D., & Hagen, D. E. (2021). Calibration of Gas Flow Meters Using Choked Flow and an Evacuated Vessel (Report No. MeasSciTechnol_32_105105). IOP Publishing. https://doi.org/10.1088/1361-6501/ac055d
Trueblood, Max, Otmar Schmid, Nicholas Altese, Christian J Hurst, Wenyan Liu, Teresa Gelles, Steven Achterberg, Philip D. Whitefield, and Donald E. Hagen. Calibration of Gas Flow Meters Using Choked Flow and an Evacuated Vessel. Report no. MeasSciTechnol_32_105105. IOP Publishing, 2021. https://doi.org/10.1088/1361-6501/ac055d.
Trueblood, Max, et al. Calibration of Gas Flow Meters Using Choked Flow and an Evacuated Vessel. IOP Publishing, 2021, Report no. MeasSciTechnol_32_105105, ROSA P. https://doi.org/10.1088/1361-6501/ac055d.
Material spreader systems are among the largest equipment expenses for winter road maintenance departments. These systems typically include a hopper or similar container to hold a supply of solid granular material; many also include a tank for dispensing a liquid. A chain conveyor or single/double auger system moves the granular material to the spi
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CTC & Associates LLC (2021). Inventory and Use of Material Spreader Systems: Synthesis Report (Report No. CR 19-S1). Minnesota. Department of Transportation. Clear Roads Pooled Fund. https://rosap.ntl.bts.gov/view/dot/57558
CTC & Associates LLC. Inventory and Use of Material Spreader Systems: Synthesis Report. Report no. CR 19-S1. Minnesota. Department of Transportation. Clear Roads Pooled Fund, 2021. https://rosap.ntl.bts.gov/view/dot/57558.
CTC & Associates LLC Inventory and Use of Material Spreader Systems: Synthesis Report. Minnesota. Department of Transportation. Clear Roads Pooled Fund, 2021, Report no. CR 19-S1, ROSA P. https://rosap.ntl.bts.gov/view/dot/57558.
Transportation electrification is playing an increasingly essential role in mitigating climate change, especially coupled with a sustainable energy system. However, proper placement of charging infrastructures and management of charging activities is the key to ensuring the environmental benefits from the widespread adoption of electric vehicles. E
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Li, X. (2021). Spatial-temporal Modeling of Electric Vehicles Charging Infrastructure and Management for a Sustainable Energy System. University of California, Davis. https://rosap.ntl.bts.gov/view/dot/66447
Li, Xinwei. Spatial-temporal Modeling of Electric Vehicles Charging Infrastructure and Management for a Sustainable Energy System. University of California, Davis, 2021. https://rosap.ntl.bts.gov/view/dot/66447.
Li, Xinwei Spatial-temporal Modeling of Electric Vehicles Charging Infrastructure and Management for a Sustainable Energy System. University of California, Davis, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/66447.
This study investigated the causes for premature, transverse cracking on urban jointed plain concrete pavements in Illinois. A field survey of 67 sections throughout Illinois coupled with ultrasonic evaluation was completed to synthesize the extent of premature cracking on urban jointed plain concrete pavements (JPCP). The visual survey showed some
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Roesler, J., Montemayor, R., DeSantis, J., & Gupta, P. (2021). Evaluation of Premature Cracking in Urban Concrete Pavement (Report No. FHWA-ICT-21-001, ICT-21-001, UILU-2021-2001). Illinois. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/58159
Roesler, Jeffery, Roberto Montemayor, John DeSantis, and Prakhar Gupta. Evaluation of Premature Cracking in Urban Concrete Pavement. Report no. FHWA-ICT-21-001, ICT-21-001, UILU-2021-2001. Illinois. Department of Transportation, 2021. https://rosap.ntl.bts.gov/view/dot/58159.
Roesler, Jeffery, et al. Evaluation of Premature Cracking in Urban Concrete Pavement. Illinois. Department of Transportation, 2021, Report no. FHWA-ICT-21-001, ICT-21-001, UILU-2021-2001, ROSA P. https://rosap.ntl.bts.gov/view/dot/58159.
This study calibrated the HCM roundabout capacity models to incorporate local Louisiana driver behavior at single-lane roundabouts, using gap acceptance parameters measured from field data at forty-one approaches from seventeen roundabouts throughout the state. The correlation between these gap acceptance parameters and certain geometric features w
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Codjoe, J., Thapa, R., Ayernor, S. M. A., & Loker, M. (2021). Determining Louisiana’s Roundabout Capacity (Report No. FHWA/LA.17/640). Louisiana. Department of Transportation and Development. https://rosap.ntl.bts.gov/view/dot/58439
Codjoe, Julius, Raju Thapa, Sam-Mark Ansah Ayernor, and Matthew Loker. Determining Louisiana’s Roundabout Capacity. Report no. FHWA/LA.17/640. Louisiana. Department of Transportation and Development, 2021. https://rosap.ntl.bts.gov/view/dot/58439.
Codjoe, Julius, et al. Determining Louisiana’s Roundabout Capacity. Louisiana. Department of Transportation and Development, 2021, Report no. FHWA/LA.17/640, ROSA P. https://rosap.ntl.bts.gov/view/dot/58439.
Recent advances in Unmanned Aircraft Systems (UAS) technologies have tremendous potential of improving the reliability and efficiency of inspections of transportation infrastructures, such as bridges, highways, railroads, construction projects, high mast light poles, etc. Two major challenges in the adoption of UAS operations for NJDOT transportati
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Agrawal, A. K., Hoomaan, E., Basile, T., & Kamga, C. (2021). NJDOT UAS/Drone Procedures Manual and Best Practices for Use in New Jersey (Report No. NJ-2021-001). New Jersey. Department of Transportation. Bureau of Research. https://rosap.ntl.bts.gov/view/dot/58713
Agrawal, Anil K., Ehssan Hoomaan, Tony Basile, and Camille Kamga. NJDOT UAS/Drone Procedures Manual and Best Practices for Use in New Jersey. Report no. NJ-2021-001. New Jersey. Department of Transportation. Bureau of Research, 2021. https://rosap.ntl.bts.gov/view/dot/58713.
Agrawal, Anil K., et al. NJDOT UAS/Drone Procedures Manual and Best Practices for Use in New Jersey. New Jersey. Department of Transportation. Bureau of Research, 2021, Report no. NJ-2021-001, ROSA P. https://rosap.ntl.bts.gov/view/dot/58713.
The project presents a pavement sensing system along with a list of promising computing models that can be used to predict pavement conditions using a vehicle-based sensing technology. The project started with data acquisition obtained from the previous field data collection followed by a series of data computing using machine learning methods to d
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Ho, C. H., Zhang, D., Gao, J., Gerosa, M., & Cambou, B. (2021). Development of Cost-Effective Sensing Systems and Analytics (CeSSA) To Monitor Roadway Conditions and Mobility Safety (Report No. PSR-19-12). Pacific Northwest Transportation Consortium (PacTrans) (UTC). https://rosap.ntl.bts.gov/view/dot/56832
Ho, Chun-Hsing, Dada Zhang, Jaiwei Gao, Marco Gerosa, and Bertrand Cambou. Development of Cost-Effective Sensing Systems and Analytics (CeSSA) To Monitor Roadway Conditions and Mobility Safety. Report no. PSR-19-12. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2021. https://rosap.ntl.bts.gov/view/dot/56832.
Ho, Chun-Hsing, et al. Development of Cost-Effective Sensing Systems and Analytics (CeSSA) To Monitor Roadway Conditions and Mobility Safety. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2021, Report no. PSR-19-12, ROSA P. https://rosap.ntl.bts.gov/view/dot/56832.
This research was completed in tandem as a project funded through MoDOT and the Mid-America Transportation Center. It used deep learning methods, along with weather information from NOAA/National Weather Service and geospatial data from the USGS National Map and other public geospatial data sources, to develop forecasting tools capable of assessing
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Corns, S. M., Long, S. K., Hale, J., Kanwar, B., & Price, L. (2021). Predictive Deep Learning for Flash Flood Management (Report No. cmr 21-001, Project number TR202023). Missouri. Department of Transportation. Construction and Materials Division. https://rosap.ntl.bts.gov/view/dot/58157
Corns, Steven M, Suzanna K Long, Jacob Hale, Bhanu Kanwar, and Lauren Price. Predictive Deep Learning for Flash Flood Management. Report no. cmr 21-001, Project number TR202023. Missouri. Department of Transportation. Construction and Materials Division, 2021. https://rosap.ntl.bts.gov/view/dot/58157.
Corns, Steven M, et al. Predictive Deep Learning for Flash Flood Management. Missouri. Department of Transportation. Construction and Materials Division, 2021, Report no. cmr 21-001, Project number TR202023, ROSA P. https://rosap.ntl.bts.gov/view/dot/58157.
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