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Â© 2018 National Academy of Sciences. All rights reserved. ACKNOWLEDGMENTS The research for this document was conducted through one or more programs administered by the Cooperative Research Programs (CRP) of the Transportation Research Board (TRB) of the National Academies of Sciences, Engineering, and Medicine: â¢ Airport Cooperative Research Program (ACRP) research is sponsored by the Federal Aviation Administration (FAA). â¢ Hazardous Materials Cooperative Research Program (HMCRP) research is sponsored by the Pipeline and Hazardous Materials Safety Administration (PHMSA). â¢ National Cooperative Freight Research Program (NCFRP) research is sponsored by the Office of the Assistant Secretary for Research and Technology. â¢ National Cooperative Highway Research Program (NCHRP) research is sponsored by the American Association of State Highway and Transportation Officials (AASHTO), in cooperation with the Federal Highway Administration (FHWA). â¢ National Cooperative Rail Research Program (NCRRP) research is sponsored by the Federal Railroad Administration. â¢ Transit Cooperative Research Program (TCRP) research is sponsored by the Federal Transit Administration (FTA) in cooperation with the Transit Development Corporation. COPYRIGHT INFORMATION Authors herein are responsible for the authenticity of their materials and for obtaining written permissions from publishers or persons who own the copyright to any previously published or copyrighted material used herein. Cooperative Research Programs (CRP) grants permission to reproduce material in this publication for classroom and not-for-profit purposes. Permission is given with the understanding that none of the material will be used to imply endorsement by TRB and any of its program sponsors of a particular product, method, or practice. It is expected that those reproducing the material in this document for educational and not-for-profit uses will give appropriate acknowledgment of the source of any reprinted or reproduced material. For other uses of the material, request permission from CRP. DISCLAIMER To facilitate more timely dissemination of research findings, this pre-publication document is taken directly from the submission of the research agency. The material has not been edited by TRB. The opinions and conclusions expressed or implied in this document are those of the researchers who performed the research. They are not necessarily those of the Transportation Research Board; the National Academies of Sciences, Engineering, and Medicine; or the program sponsors. The Transportation Research Board, the National Academies, and the sponsors of the National Cooperative Highway Research Program do not endorse products or manufacturers. Trade or manufacturersâ names appear herein solely because they are considered essential to the object of the report. This pre-publication document IS NOT an official publication of the Cooperative Research Programs; the Transportation Research Board; or the National Academies of Sciences, Engineering, and Medicine. Recommended citation: Marzougui, D., C. D. Kan, U. Mahadevaiah, F. Tahan, C. Story, S. Dolci, A. Moreno, K. S. Opiela, and R. Powers. 2018. Evaluating the Performance of Longitudinal Barriers on Curved, Superelevated Roadway Sections. Pre-publication draft of NCHRP Research Report 894. Transportation Research Board, Washington, D.C.