TRB’s National Cooperative Highway Research Program (NCHRP) Report 774 provides superelevation criteria for horizontal curves on steep grades. A series of field studies and vehicle dynamics simulations were undertaken to investigate combinations of horizontal curve and vertical grade design.
National Academies of Sciences, Engineering, and Medicine. 2014. Superelevation Criteria for Sharp Horizontal Curves on Steep Grades. Washington, DC: The National Academies Press. https://doi.org/10.17226/22312.
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