Make regular roads look like seasonal assets. This is a seasonal snow cover spline for a 12m (40ft) wide, 2-lane road. The snow will be visible where the spline is above the route's environmental snowline, and invisible below the snowline.
The spline is based on gfisher's 40ft-wide AASHTO roads. With some height adjustments, it can be fitted over other types of 2-lane road too.
LOD's contain 12, 6 and 4 triangles plus 1 material per repeat unit. Culled at a nominal 4000m. Made in 3DS Max 2009.