Best practice for flexible pavement structure widening projects : [summary].

Details

• Creators:
  Murphy, Mike ; Burton, Maria ; Kim, Moo Yeon ; Smit, Andre ; Trevino, Manuel ; Wu, Hui ; Prozzi, Jorge
• Corporate Creators:
  University of Texas at Austin. Center for Transportation Research
• Subject/TRT Terms:
  • Flexible pavements
  • Pavement widening
  • Best practices
  • Pavement performance
  • Road shoulders
  • Paving
  • Decision support systems
• Publication/ Report Number:
  0-6748
• Resource Type:
  Brief
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas. Dept. of Transportation. Research and Technology Implementation Office
• Description:
  The Texas Department of Transportation (TxDOT) has experienced problems with construction quality and performance on narrow widening projects (e.g., adding a 2- to 5-ft shoulder). Texas has approximately 40,000 lane-miles of FM roads with 9- to 10-ft-wide lanes. In addition, approximately 20 percent, 26 percent, and 36 percent of roadways with 9-ft, 10-ft, and 11-ft lanes, respectively, have either no shoulder or a 1-ft shoulder. These roads are potential candidates for lane or shoulder widening to improve safety performance and increase capacity. However, due to constraints regarding construction equipment limitations, material selection options and compatibility, construction methods, and other issues, problems with narrow widening projects can arise. These challenges include inadequate compaction at the base layer joint interface, drainage within the pavement and at the pavement surface, either high or depressed surface layer construction joints, and potential safety concerns.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28004/dot_28004_DS1.pdf
• File Type:
  [PDF - 97.29 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:aa963499505f176da8845d24eea67f2959c4bcadceb86aff8d0976c20fb17cf7