(SuDoc TD 2.8:G 78)
By Ken Skorseth

Publisher: U.S. Dept. of Transportation, Federal Highway Administration
Number Of Pages:
Publication Date: 2000
ISBN-10 / ASIN: B000115EM2
ISBN-13 / EAN:
Binding: Unknown Binding

There are over 1.6 million miles of unpaved roads (53% of all roads) in the United States. In some nations, the road network is predominantly unpaved and generally consists of gravel roads. This manual was developed with a major emphasis on the maintenance of gravel
roads, including some basic design elements. Gravel roads are generally the lowest service provided to the traveling public and are usually
considered greatly inferior to paved roads. Yet,in many rural regions, the volume of traffic is so low that paving and maintaining a paved road is not economically feasible. In many cases, gravel roads exist to provide a means of getting agricultural products in and out of farm fields, timber out of forests, or as access to remote areas such as campgrounds and lakes. Many gravel roads serve rural residents as well. Many of these roads will remain unpaved due to very low traffic volume and/or lack of funds to adequately improve the subgrade and base before applying pavement layer(s).In some countries, economic constraints mean gravel roads are the only type that can be provided.
The purpose of this manual is to provide clear and helpful information for doing a better job
of maintaining gravel roads. It is recognized that very little technical help is available to small agencies that are responsible for managing these roads. Gravel maintenance has traditionally been “more of an art than a science” and very few formal standards exist. This leads to many
arguments between grader operators, managers, and motorists over questions such as:What is enough surface crown? What is too much? What causes corrugation? This manual contains guidelines to help answer these and other questions about the maintenance of gravel roads.
This manual is designed for the benefit of elected officials, managers, and grader operators who are responsible for designing and maintaining gravel roads. The information provided in this manual is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.

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