Operation and maintenance of gravel roads: a literature study

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Hossein Alzubaidi

Gravel roads form a large percentage of the road network in Sweden. The public road network under the jurisdiction of the Swedish National Road Administration has a total length of some 98,000 kilometres. About 22,000 km of this network consists of gravel roads. In addition, there are about 74,000 kilometres of private road and 210,000 kilometres of forest roads. The report describes the present position in the operation and maintenance of gravel roads. It presents a comprehensive literature survey of current and recent national and international research. It deals only with summer maintenance and focuses primarily on roads surfaced with aggregate. The following areas are treated in the report: - Definitions and terms regarding the operation and maintenance of gravel roads.- General description of the Swedish road network. - Major factors causing deterioration of gravel roads. - Technical requirements for Swedish gravel roads. - Factors, which influence the operation and maintenance of gravel roads. - Operation and maintenance methods. - Condition assessment of gravel roads. - Planning and evaluation of operation and maintenance measures.

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