ABSTRACT
Many rural roads began life as natural, unpaved (dirt) tracks for horse-drawn or off-
road vehicles. The main forms of damage that such roads suffer are wheel rutting and
erosion due to wind and water. With occasional attention to drainage, unpaved tracks are
able to carry up to about 10 veh/d. Over the years, they may be progressively up-graded
by a process known as stage construction. Typical stages will now be described.
