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.
This study sought to identify best practices for setting work zone speed limits by state departments of transportation (DOTs) and to evaluate select strategies for improving compliance with work zone speed limits. This was achieved by synthesizing information from a literature review, a state DOT survey, and field evaluations of select speed manage
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Savolainen, P. T., Gates, T. J., Edara, P., Brown, H., Mahmud, M. S., & Megat-Johari, M. U. (2022). Work Zone Speed Limits and Motorist Compliance (Report No. Part of TPF-5(438)). Smart Work Zone Deployment Initiative. https://rosap.ntl.bts.gov/view/dot/66919
Savolainen, Peter T., Timothy J. Gates, Praveen Edara, Henry Brown, Md Shakir Mahmud, and Megat-Usamah Megat-Johari. Work Zone Speed Limits and Motorist Compliance. Report no. Part of TPF-5(438). Smart Work Zone Deployment Initiative, 2022. https://rosap.ntl.bts.gov/view/dot/66919.
Savolainen, Peter T., et al. Work Zone Speed Limits and Motorist Compliance. Smart Work Zone Deployment Initiative, 2022, Report no. Part of TPF-5(438), ROSA P. https://rosap.ntl.bts.gov/view/dot/66919.
Seal coats in Texas are unique because most binder is hot applied, and aggregates are precoated. Precoating eliminates dust and improves adhesion between aggregate and binder. There currently exists no guidelines or specifications in place that can allow engineers to specify and accept the quality and extent of binder used to precoat aggregates. Pr
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Lopez, E., Rung, M., Adwani, D., Masad, A., Hazlett, D., & Bhasin, A. (2022). Developing Guidelines for Precoating of Aggregates Used in Seal Coats [Report] (Report No. FHWA/TX-22/0-7057-1). University of Texas at Austin. Center for Transportation Research. https://rosap.ntl.bts.gov/view/dot/64699
Lopez, Erica, Michael Rung, Dheeraj Adwani, Ahmad Masad, Darren Hazlett, and Amit Bhasin. Developing Guidelines for Precoating of Aggregates Used in Seal Coats [Report]. Report no. FHWA/TX-22/0-7057-1. University of Texas at Austin. Center for Transportation Research, 2022. https://rosap.ntl.bts.gov/view/dot/64699.
Lopez, Erica, et al. Developing Guidelines for Precoating of Aggregates Used in Seal Coats [Report]. University of Texas at Austin. Center for Transportation Research, 2022, Report no. FHWA/TX-22/0-7057-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/64699.
Through academic research and direct communications with transportation agencies, this project surveys new roadside technologies that can assist in efforts for detecting pedestrians. Reasons for using such technologies include traffic operations enhancements, safety improvements, planning, benchmarking, and eventual connected vehicle integrations.
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Haddad, A., Macias, L., Bhat, C. R., & Perrine, K. A. (2022). Synthesis of Automated Pedestrian Data Collection Technologies [Report] (Report No. FHWA/TX-22/0-7126-1). University of Texas at Austin. Center for Transportation Research. https://rosap.ntl.bts.gov/view/dot/64694
Haddad, Angela, Lisa Macias, Chandra R. Bhat, and Kenneth A. Perrine. Synthesis of Automated Pedestrian Data Collection Technologies [Report]. Report no. FHWA/TX-22/0-7126-1. University of Texas at Austin. Center for Transportation Research, 2022. https://rosap.ntl.bts.gov/view/dot/64694.
Haddad, Angela, et al. Synthesis of Automated Pedestrian Data Collection Technologies [Report]. University of Texas at Austin. Center for Transportation Research, 2022, Report no. FHWA/TX-22/0-7126-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/64694.
A 2014 change in vehicle appearance guidelines forwent custom bright yellow paint job in favor of the factory standard white color for NCDOT light duty trucks. This change raised some concerns about vehicle conspicuity, or the vehicle’s ability to draw attention to itself. The addition of high visibility markings was offered as a possible solution.
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Sylcott, B. (2022). Considering Conspicuity for North Carolina Department of Transportation Light Trucks Final Report (Report No. 2020-33). North Carolina Department of Transportation. Research and Development Unit. https://rosap.ntl.bts.gov/view/dot/72283
Sylcott, Brian. Considering Conspicuity for North Carolina Department of Transportation Light Trucks Final Report. Report no. 2020-33. North Carolina Department of Transportation. Research and Development Unit, 2022. https://rosap.ntl.bts.gov/view/dot/72283.
Sylcott, Brian Considering Conspicuity for North Carolina Department of Transportation Light Trucks Final Report. North Carolina Department of Transportation. Research and Development Unit, 2022, Report no. 2020-33, ROSA P. https://rosap.ntl.bts.gov/view/dot/72283.
The objective of this study was to evaluate the change in crash frequency or severity of varying lateral offset distances of high-tension cable median barriers in Minnesota. Crash and traffic data from 2016 to present were conjoined with roadway cross-sectional data and high-tension cable barrier locations to perform cross-sectional analyses for in
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Storm, R., Srinivasan, R., Lan, B., Klump, S., Herring, R., Wemple, B., Saleem, T., & Schroeder, W. (2022). High-tension Cable Median Barrier Safety Effectiveness Evaluation (Report No. MN 2022-34). Minnesota. Department of Transportation. Office of Research & Innovation. https://rosap.ntl.bts.gov/view/dot/65586
Storm, Richard, Raghavan Srinivasan, Bo Lan, Sam Klump, Rebecca Herring, Beth Wemple, Taha Saleem, and Whitney Schroeder. High-tension Cable Median Barrier Safety Effectiveness Evaluation. Report no. MN 2022-34. Minnesota. Department of Transportation. Office of Research & Innovation, 2022. https://rosap.ntl.bts.gov/view/dot/65586.
Storm, Richard, et al. High-tension Cable Median Barrier Safety Effectiveness Evaluation. Minnesota. Department of Transportation. Office of Research & Innovation, 2022, Report no. MN 2022-34, ROSA P. https://rosap.ntl.bts.gov/view/dot/65586.
The Multiple Stress Creep Recovery (MSCR) test can characterize polymer-modified asphalt binders and correlates well with the mixture rutting parameters. The MSCR is able to complement a suite of additional binder tests, namely Dynamic Modulus, Phase Angle, and “PG-Plus” tests. A recently-completed MSCR study conducted by the LTRC recommended that
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Mata, D., & Salari, S. (2022). Evaluation of Non-SBS Modified Binders Using the Multiple Stress Creep Recovery Test (Report No. FHWA/LA.17/583). Louisiana. Department of Transportation and Development. https://rosap.ntl.bts.gov/view/dot/64629
Mata, David and Saman Salari. Evaluation of Non-SBS Modified Binders Using the Multiple Stress Creep Recovery Test. Report no. FHWA/LA.17/583. Louisiana. Department of Transportation and Development, 2022. https://rosap.ntl.bts.gov/view/dot/64629.
Mata, David, and Saman Salari Evaluation of Non-SBS Modified Binders Using the Multiple Stress Creep Recovery Test. Louisiana. Department of Transportation and Development, 2022, Report no. FHWA/LA.17/583, ROSA P. https://rosap.ntl.bts.gov/view/dot/64629.
2022-10-01
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Domestic Airline Fares Consumer Report
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Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric
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United States. Department of Transportation (2022). Domestic Airline Fares Consumer Report: Second Quarter 2022 Passenger and Fare Information. United States. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/75800
United States. Department of Transportation. Domestic Airline Fares Consumer Report: Second Quarter 2022 Passenger and Fare Information. United States. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/75800.
United States. Department of Transportation Domestic Airline Fares Consumer Report: Second Quarter 2022 Passenger and Fare Information. United States. Department of Transportation, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/75800.
The advanced material properties and superior durability of ultra-high-performance concrete (UHPC) provide an opportunity for significant design and construction benefits for Texas bridges. However, several challenges have slowed the application of UHPC in the precast industry, such as the high cost of proprietary UHPC mixtures, slower production d
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Schwerdt, T., & Hueste, M. B. D. (2022). Utilization of UHPC Bridge Superstructures in Texas [Summary]. Texas Department of Transportation. Research and Technology Implementation Office. https://rosap.ntl.bts.gov/view/dot/72726
Schwerdt, Tom and Mary Beth D. Hueste. Utilization of UHPC Bridge Superstructures in Texas [Summary]. Texas Department of Transportation. Research and Technology Implementation Office, 2022. https://rosap.ntl.bts.gov/view/dot/72726.
Schwerdt, Tom, and Mary Beth D. Hueste Utilization of UHPC Bridge Superstructures in Texas [Summary]. Texas Department of Transportation. Research and Technology Implementation Office, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/72726.
This guidebook will outline the design, development, and deployment of an SP experiment alongside an entire RP-SP survey to best harness the information provided by respondents on behaviors, attitudes, and reactions to both the future and past, the hypothetical and real. Once the RP-SP survey has been designed and deployed, responses have been coll
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Asmussen, K., Mondal, A., Macias, L., & Bhat, C. (2022). Integration of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Final Guidebook. University of Texas at Austin. Center for Transportation Research. https://rosap.ntl.bts.gov/view/dot/64639
Asmussen, Katherine, Aupal Mondal, Lisa Macias, and Chandra Bhat. Integration of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Final Guidebook. University of Texas at Austin. Center for Transportation Research, 2022. https://rosap.ntl.bts.gov/view/dot/64639.
Asmussen, Katherine, et al. Integration of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Final Guidebook. University of Texas at Austin. Center for Transportation Research, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/64639.
Pedestrian safety is a growing concern for transportation planners and safety engineers within North Carolina and across the country. Pedestrians are extremely vulnerable users of the transportation system and are particularly subject to serious injuries and fatalities in the event of a crash. For example, while pedestrians are involved in just 1%
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Gayah, V. V., Guler, S. I., Liu, H., Blackburn, L., & Hamilton, I. (2022). Quantification of Systemic Risk Factors for Pedestrian Safety on North Carolina (Report No. 2022-11). North Carolina Department of Transportation. Research and Development Unit. https://rosap.ntl.bts.gov/view/dot/77929
Gayah, Vikash V., S. Ilgin Guler, Hao Liu, Lauren Blackburn, and Ian Hamilton. Quantification of Systemic Risk Factors for Pedestrian Safety on North Carolina. Report no. 2022-11. North Carolina Department of Transportation. Research and Development Unit, 2022. https://rosap.ntl.bts.gov/view/dot/77929.
Gayah, Vikash V., et al. Quantification of Systemic Risk Factors for Pedestrian Safety on North Carolina. North Carolina Department of Transportation. Research and Development Unit, 2022, Report no. 2022-11, ROSA P. https://rosap.ntl.bts.gov/view/dot/77929.
The objectives of this research will be achieved through conducting an engineering strength analysis on the four proposed retrofit designs considered for this project in accordance with AASHTO LRFD Section 13 Specifications for MASH Test Level 4 impact conditions.
Williams, W., Rupnow, T., & Alaywan, W. (2022). MASH TL-4 Engineering Analyses and Detailing of 36-Inch and 42-Inch High Median Barriers for DOTD [Research Project Capsule] [23–1ST] (Report No. 23-1ST). Louisiana Transportation Research Center. https://rosap.ntl.bts.gov/view/dot/64626
Williams, William, Tyson Rupnow, and Walid Alaywan. MASH TL-4 Engineering Analyses and Detailing of 36-Inch and 42-Inch High Median Barriers for DOTD [Research Project Capsule] [23–1ST]. Report no. 23-1ST. Louisiana Transportation Research Center, 2022. https://rosap.ntl.bts.gov/view/dot/64626.
Williams, William, et al. MASH TL-4 Engineering Analyses and Detailing of 36-Inch and 42-Inch High Median Barriers for DOTD [Research Project Capsule] [23–1ST]. Louisiana Transportation Research Center, 2022, Report no. 23-1ST, ROSA P. https://rosap.ntl.bts.gov/view/dot/64626.
Alternative Intersection and Interchange (AII) designs provide an innovative approach to the geometric and control features at intersections. Nevertheless, most of the AII designs have unconventional ways to maneuver through the intersection such as restriction of movements, crossover of traffic to the opposite side of the road, separating left tur
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Cunningham, C. M., Chase, R. T., Yang, G., Wright, W., Pyo, K., Kaber, D., & Liu, Y. (2022). Design Consistency on Corridors (Report No. FHWA/NC/2020-31). North Carolina. Department of Transportation. Research and Analysis Group. https://rosap.ntl.bts.gov/view/dot/88561
Cunningham, Christopher M., R. Thomas Chase, Guangchuan Yang, Waugh Wright, Kihyun Pyo, David Kaber, and Yunmei Liu. Design Consistency on Corridors. Report no. FHWA/NC/2020-31. North Carolina. Department of Transportation. Research and Analysis Group, 2022. https://rosap.ntl.bts.gov/view/dot/88561.
Cunningham, Christopher M., et al. Design Consistency on Corridors. North Carolina. Department of Transportation. Research and Analysis Group, 2022, Report no. FHWA/NC/2020-31, ROSA P. https://rosap.ntl.bts.gov/view/dot/88561.
The Indiana Department of Transportation (INDOT) started deploying queue warning trucks ahead of interstate work zonestoalert motorists of queued traffic. Along with visually alerting the motorists, digital alerts were integrated with navigational applications such as Apple Maps, Waze, and the in-vehicle infotainment system of Stellantis vehicles.
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Sakhare, R. S., Mahlberg, J., Mathew, J. K., Desai, J., Li, H., & Bullock, D. M. (2022). Impacts to Traffic Behaviour From Queue Warning Truck: Current Pilot Project (Report No. FHWA/IN/JTRP-2022/26). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317448
Sakhare, Rahul Suryakant, Justin Mahlberg, Jijo K Mathew, Jairaj Desai, Howell Li, and Darcy M. Bullock. Impacts to Traffic Behaviour From Queue Warning Truck: Current Pilot Project. Report no. FHWA/IN/JTRP-2022/26. Purdue University. Joint Transportation Research Program, 2022. https://doi.org/10.5703/1288284317448.
Sakhare, Rahul Suryakant, et al. Impacts to Traffic Behaviour From Queue Warning Truck: Current Pilot Project. Purdue University. Joint Transportation Research Program, 2022, Report no. FHWA/IN/JTRP-2022/26, ROSA P. https://doi.org/10.5703/1288284317448.
Distracted driving is one of the main causes of injuries and fatalities in the United States. 3,142 people were killed, and 324,000 were injured because of distracted driving in 2020. According to previous studies, cell phone use is one of the main sources of distraction while driving. The percentage of young drivers who never text and drive under
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Jeihani, M., Javid, R., & Sadeghvaziri, E. (2022). Educating the Public About Distracted Driving and Evaluating Distraction-Prevention Technologies. Morgan State University. National Transportation Center. https://rosap.ntl.bts.gov/view/dot/66082
Jeihani, Mansoureh, Ramina Javid, and Eazaz Sadeghvaziri. Educating the Public About Distracted Driving and Evaluating Distraction-Prevention Technologies. Morgan State University. National Transportation Center, 2022. https://rosap.ntl.bts.gov/view/dot/66082.
Jeihani, Mansoureh, et al. Educating the Public About Distracted Driving and Evaluating Distraction-Prevention Technologies. Morgan State University. National Transportation Center, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/66082.
The Iowa Department of Transportation (DOT) uses a wide range of data to support business functions across the enterprise. While data is not always available, accessible, or reliable, it is critical for developing products that meet the needs of the Department’s customers and supporting DOT business operations. The Department recognizes the urgency
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Supporting Files
Iowa. Department of Transportation (2022). Developing a Roadmap for Digital Delivery in Iowa [Strategic Plan for Digital Delivery] (Report No. SPR 3224). Iowa. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/79726
Iowa. Department of Transportation. Developing a Roadmap for Digital Delivery in Iowa [Strategic Plan for Digital Delivery]. Report no. SPR 3224. Iowa. Dept. of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/79726.
Iowa. Department of Transportation Developing a Roadmap for Digital Delivery in Iowa [Strategic Plan for Digital Delivery]. Iowa. Dept. of Transportation, 2022, Report no. SPR 3224, ROSA P. https://rosap.ntl.bts.gov/view/dot/79726.
Activity-based household travel surveys (HTS) are one of primary data sources for many research fields at Tennessee Department of Transportation (TDOT). Traditional HTS methods are often costly, time-consuming, less scalable, and difficult to achieve high quality and accuracy. Recent years have witnessed a fast-growing interest in conducting HTS th
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Xie, M., Wu, D. l., & Yang, L. (2022). Activity-Based Household Travel Survey Through Smartphone Apps in Tennessee (Report No. RES 2020-19). Tennessee. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/66935
Xie, Mengjun, Da lei Wu, and Li Yang. Activity-Based Household Travel Survey Through Smartphone Apps in Tennessee. Report no. RES 2020-19. Tennessee. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/66935.
Xie, Mengjun, et al. Activity-Based Household Travel Survey Through Smartphone Apps in Tennessee. Tennessee. Department of Transportation, 2022, Report no. RES 2020-19, ROSA P. https://rosap.ntl.bts.gov/view/dot/66935.
Subsurface investigations currently rely on conventional soil borings with the aid of cone penetrometer test (CPT)soundings. However, these geotechnical explorations can be expensive and information is not provided between bore holes. Geophysical methods can aid in providing some information between the boreholes at a lower cost for the Louisiana D
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Ferguson, N., & Gautreau, G. (2022). Feasibility Study on Geophysical Methods to Estimate Geotechnical Properties in Louisiana (Report No. FHWA/LA.22/667). Louisiana. Department of Transportation and Development. https://rosap.ntl.bts.gov/view/dot/64635
Ferguson, Nicholas and Gavin Gautreau. Feasibility Study on Geophysical Methods to Estimate Geotechnical Properties in Louisiana. Report no. FHWA/LA.22/667. Louisiana. Department of Transportation and Development, 2022. https://rosap.ntl.bts.gov/view/dot/64635.
Ferguson, Nicholas, and Gavin Gautreau Feasibility Study on Geophysical Methods to Estimate Geotechnical Properties in Louisiana. Louisiana. Department of Transportation and Development, 2022, Report no. FHWA/LA.22/667, ROSA P. https://rosap.ntl.bts.gov/view/dot/64635.
Roadway fatalities are a major priority in the transportation sector. UDOT has noted that fatalities increased in 2020 with the leading cause, by a substantial margin, being rural roadway departures. Knowledge about the specific characteristics of rural roadway departure crashes can help UDOT to develop proper mitigation strategies. This research w
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Burbidge, S. K., Anderson, C., & Welch, A. (2022). Investigation of Rural Roadway Departures (Report No. UT- 23.03). Utah. Dept. of Transportation. Research Division. https://rosap.ntl.bts.gov/view/dot/66948
Burbidge, Shaunna K., Camille Anderson, and Adrian Welch. Investigation of Rural Roadway Departures. Report no. UT- 23.03. Utah. Dept. of Transportation. Research Division, 2022. https://rosap.ntl.bts.gov/view/dot/66948.
Burbidge, Shaunna K., et al. Investigation of Rural Roadway Departures. Utah. Dept. of Transportation. Research Division, 2022, Report no. UT- 23.03, ROSA P. https://rosap.ntl.bts.gov/view/dot/66948.
This research project investigated the impacts of traffic signal progression strategy on the safety of pedestrians and bicyclists. The CUTR team used historical (crash, traffic, and roadway) data, cross-sectional study designs, and random parameter negative binomial models to estimate the effects of signal progression design on pedestrian and bicyc
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Lin, P. S., & El-Urfali, A. (2022). Development of Crash Modification Factors for Speed Management of Traffic Signal Progression [Summary]. Florida Department of Transportation. https://rosap.ntl.bts.gov/view/dot/75385
Lin, Pei-Sung and Alan El-Urfali. Development of Crash Modification Factors for Speed Management of Traffic Signal Progression [Summary]. Florida Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/75385.
Lin, Pei-Sung, and Alan El-Urfali Development of Crash Modification Factors for Speed Management of Traffic Signal Progression [Summary]. Florida Department of Transportation, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/75385.
Public engagement is an important and required element of the transportation planning process. Since the onset of the COVID-19 pandemic, public engagement has shifted dramatically. Agencies of all sizes accelerated their transition to virtual engagement in 2020 to comply with shelter-in-place orders and social distancing guidelines. Social media an
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Dougald, L. E., & Williams, E. S. (2022). An Analysis of Virtual Public Engagement in the Transportation Planning Process (Report No. FHWA/VTRC 23-R6). Virginia Transportation Research Council (VTRC). https://rosap.ntl.bts.gov/view/dot/64744
Dougald, Lance E and Eric S Williams. An Analysis of Virtual Public Engagement in the Transportation Planning Process. Report no. FHWA/VTRC 23-R6. Virginia Transportation Research Council (VTRC), 2022. https://rosap.ntl.bts.gov/view/dot/64744.
Dougald, Lance E, and Eric S Williams An Analysis of Virtual Public Engagement in the Transportation Planning Process. Virginia Transportation Research Council (VTRC), 2022, Report no. FHWA/VTRC 23-R6, ROSA P. https://rosap.ntl.bts.gov/view/dot/64744.
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