02978cam a2200325Ia 450000500170000000800410001702000180005803500150007605000230009110000150011424501190012926400610024830000500030949000270035950000680038652015320045450400540198665000350204065000420207570000310211770000310214870000310217970000300221071000700224071000510231071000720236171000700243383000410250385601080254420260818085136.0160404s2016    dcua    obt   000 0 eng d  a9781523108909  a.b12292801 4aTE175b.F39 2016eb1 aFay, Laura10aConverting paved roads to unpaved /cconsultants: Laura Fay, Ashley Kroon, Ken Skorseth, Richard Reid, David Jones 1aWashington, D.C. :bTransportation Research Board,c2016  a1 online resource (88 pages) :billustrations1 aNCHRP synthesis ;v485  aAt head of title: National Cooperative Highway Research Program  a"TRB National Cooperative Highway Research Program (NCHRP) Synthesis 485: Converting Paved Roads to Unpaved explores how common and under what conditions paved roads are converted to unpaved. NCHRP Synthesis 485 found that the practice of converting paved roads to unpaved is relatively widespread; recent road conversion projects were identified in 27 states. These are primarily rural, low-volume roads that were paved when asphalt and construction prices were low. Those asphalt roads have now aged well beyond their design service life, are rapidly deteriorating, and are both difficult and expensive to maintain. Instead, many local road agencies are converting these deteriorated paved roads to unpaved as a more sustainable solution. According to the report, local road agencies have experienced positive outcomes by converting roads. Many local road agencies reported cost savings after converting, compared with the costs of continuing maintenance of the deteriorating paved road, or repaving. One key to successful conversion is early involvement of the public in the planning process. Other techniques that can be used to improve the overall results of a project include treating or stabilizing granular surfaces to control dust, limiting the rate of aggregate loss, and reducing motor grader/blade maintenance frequency. Stabilization procedures can also improve safety, increase public acceptance, and reduce life-cycle costs and environmental impacts after a conversion has taken place."--Publisher's description.  aIncludes bibliographical references (pages 28-30) 0aRoadsxDesign and construction 0aGravel roadsxDesign and construction1 aKroon, Ashley,econsultant1 aSkorseth, Ken,econsultant1 aReid, Richard,econsultant1 aJones, David,econsultant2 aNational Research Council (U.S.).bTransportation Research Board.2 aNational Cooperative Highway Research Program.2 aAmerican Association of State Highway and Transportation Officials.1 aUnited States.bFederal Highway Administration,esponsoring body. 0aSynthesis of highway practice ;v485403Download: Knoveluhttp://app.knovel.com/hotlink/toc/id:kpCPRUASH1/converting-paved-roads?kpromoter=marc