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- W133644892 abstract "The principle that the delivery of safe and effective road services is a duty owed to the road users provides the impetus for a quality assurance (QA) program. QA refers to all of the criteria and activities used to verify and audit road performance. Road conditions are measured in terms of pavement distress extent and severity, structural roughness, potholes, dust, and rutting (plastic deformation under the wheel path). Simplified QA criteria are presented related to surface distress severity, traffic loading, maintenance expenditures, vehicle operating cost (VOC), and economic indicators such as net present value and internal rate of return. Construction and maintenance work procedures and their QA and quality control (QC) procedures are introduced. The choice between using rougher surfaces with more severe potholes and dust distresses and higher VOC is compared with the use of smoother roads that require higher maintenance and rehabilitation costs but save the users money. As an example, when the average daily traffic is equivalent to fifteen 12-ton trucks, road owners have a choice between (a) a dirt road that requires U.S.$2,800 in annual maintenance expenditures and will develop surface roughness of 14 m/km and medium to high severity of dust and potholes or (b) a silty sand surface with roughness of 10 m/km with a lower level of potholes and dust but higher rehabilitation and maintenance costs. Although the economic return of upgrading the dirt road to a silty sand surface is 12%, the road's owners may select to postpone the road improvement and spend less on rehabilitation and maintenance and allow a higher VOC. On any given road network the tradeoff between spending on routine maintenance and saving in VOC should be carefully evaluated to provide a balance among user cost considerations, agency costs, and acceptable road performance." @default.
- W133644892 created "2016-06-24" @default.
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- W133644892 date "1994-01-01" @default.
- W133644892 modified "2023-09-23" @default.
- W133644892 title "QUALITY ASSURANCE PROCEDURES RELATED TO ADMINISTRATION OF UNSURFACED ROADS" @default.
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