i wonder how they did the road making in freeworld 3d?!? such a feature would be nice too triplex

as far as i know you can have only up to 3 different textures + 1 detail map for a terrain with a normal not 1.4 mutltitextureshader. so this must either be made of sprites wich i doubt or models (faces) with a texture.
so in theory the terrain is flattend and something is layed on top of it to look like a street right?