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Otros Países
INTRODUCTION
Background and Statement of Problem
Out of the 3.8 million miles of road in the continental US, it is
estimated that over 47 percent are aggregate and earth surfaced
roads (Colorado Transportation Information Center. #5, 1989).
Depending on which part of the country one is located the
percentage of the road networks that is unpaved could vary between
30 and 70 percent. For example, here in Colorado approximately 65
percent of public roads are unpaved. Most of the unpaved roads are
classified as low-volume roads and are located in the rural and
forest areas of the country. While unpaved roads carry a small
portion of the country's traffic, they provide a vital first link in the
county's economy.