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su·per·el·e·va·tion | \ ˌsü-pər-ˌe-lə-ˈvā-shən 
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\Definition of superelevation
1 : the vertical distance between the heights of inner and outer edges of highway pavement or railroad rails
2 : additional elevation
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Time Traveler for superelevation
The first known use of superelevation was in 1840
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