Design Considerations for Flexible Pavement Widening

The Texas Department of Transportation (TxDOT) prepared Safety Bond Projects that were to undertake the letting of construction projects for flexible pavement widening on current pavement widths less than 24 ft. Typically, these projects were approximately 20 ft widths, where widening will extend the pavement width to approximately 27 to 28 ft. Few guidelines exist statewide for assisting designers in selecting the appropriate widening technique. Current specifications provide a basic framework for construction performance and compaction; however, there are major pavement related issues that are not addressed. Some of these issues include: meeting density requirements on narrow sections, placing the joint in the wheel path, and not matching pavement sections, which can cause moisture to be trapped in the original structure. To address these considerations and others, this project focused on an extensive literature review and a survey of various district personnel regarding project selection and issues faced during construction of widening projects. This study concluded with a site-specific approach to selection of proper material use and/or re-use, construction technique and traffic control to warrant rapid construction and long-term stability of the widened pavement, which is summarized into a flexible pavement widening guideline.

• Record URL:
  http://tti.tamu.edu/documents/0-5429-1.pdf
• 
• Supplemental Notes:
  • Project Title: Considerations for Flexible Pavement Widening Projects. Report Date: March 2007; Published: April 2007.
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 3135 TAMU
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hilbrich, Stacy L
  • Scullion, Tom
• Publication Date: 2007-4

Language

• English

Media Info

• Media Type: Print
• Edition: Technical Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 68p

Subject/Index Terms

• TRT Terms: Construction and maintenance personnel; Construction management; Flexible pavements; Guidelines; Literature reviews; Materials selection; Pavement design; Pavement widening; Specifications; Surveys; Work zone traffic control
• Uncontrolled Terms: Rapid construction
• Subject Areas: Construction; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 01049420
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-07/0-5429-1, Report 0-5429-1
• Contract Numbers: Project 0-5429
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 16 2007 8:42AM