superelevation
/ˌsupərˌɛləˈveɪʃən/
noun
- The amount or degree to which a road or railway track is tilted upward on the outer edge of a curve, for safety and stability.
- The superelevation on this highway curve is 6 percent, which allows cars to travel safely at 70 miles per hour.
- Too much superelevation can cause vehicles to slide toward the inside of the curve.
- Engineers calculated the exact superelevation needed for the new train tracks.