A study of Oregon's surfacing design procedures.

Details

• Creators:
  Scofield, John T. ; Tindall, Douglas J. ; Olds, Sandra Barton
• Corporate Creators:
  Oregon. Dept. of Transportation. Research Unit
• Subject/TRT Terms:
  Costs Cracking Economic Analysis Patching Pavement Design Pavement Performance Service Life Surface Course (Pavements) Surface Design
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oregon
• Corporate Publisher:
  Oregon. Dept. of Transportation. Research Unit
• Abstract:
  This study of the Oregon State Highway Division's surfacing design procedures was undertaken to determine if the expected service is being obtained from current design practices, and to provide an comparison of different design alternatives to permit an optimum strategy to be selected. The economic analysis included full depth and staged construction alternatives for both 20 year and 10 year designs.
  
  An analysis of deflection measurements taken for this study indicate that the predicted pavement performance is being achieved; however, none of the projects are old enough to confirm the performance through the entire design life. There was some spread in the results, indicating some pavement performed better and some not as well as anticipated. The projects studied also showed that cracking and patching start to occur at the age the second stage overlay was expected to be needed.
  
  The economic analysis of surfacing design alternatives indicated that a 20 year design life with entire depth placed initially has the lowest total cost of the alternatives studied.the total cost over a 20 year period for a full depth 20 year design is about 20 percent lower than the cost for a 10 year full depth design, and about 4 percent lower than the cost of 20 year design with 2 inches delayed and placed when required. The analysis included an example of the affects of the alternatives on the backlog of poor pavements which indicated that for a 20 year period, the 20 year stage constructed design life would result in the lowest backlog.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:c29f3963133764c8824e3450d6eb935d6eb680f2cbc870a261c60c33c24baffe
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/22869/dot_22869_DS1.pdf
• File Type:
  [PDF - 2.28 MB ]