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Super Elevation


Super elevation is tilting the roadway to help offset centripetal forces developed as the vehicle goes around a curve. Along with friction they are what keeps a vehicle from going off the road.

A super elevated section is proceeded by a transition section.  The values of super elevation are determined from the AASHTO Design Guide and are a function of the rate of super elevation and the curve radius.  The transitions calculations can be done using the spreadsheet calculator and are illustrated in the sketch below.

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