3 PAVED ROADS NEI Method  Activity Data [vehicle miles traveled (VMT) on paved roads] »State-Level Activity Data State/road type level VMT from paved roads = Total State/road type-level VMT - State/road type-level unpaved road VMT –Because of differences in methodology between the calculation of total and unpaved VMT, there may be cases where unpaved VMT is higher than total VMT.
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