Diría que los tres, "contour, crown, cross-fall" están utilizados como verbo, y prácticamente como sinónimos:

"La calzada debe disponer de pendiente transversal hacia cunetas..."

De los enlaces indicados abajo:

crossfall: the transverse sloping of a roadway toward the shoulder or gutter on either side

"The cross-sectional shape of a road surface, in particular in connection to its role in managing runoff, is called "crown"."

"Cross slope describes the slope of a roadway perpendicular to the centerline. If a road were completely level, water would drain off it very slowly. This would create problems with hydroplaning, and ice accumulation in cold weather."