Best Practice for Flexible Pavement Structure Widening Projects
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 Farm-to-Market (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. To effectively overcome these challenges, TxDOT has initiated this project to prepare a compendium of best practices and lessons learned regarding narrow widening projects. The primary goal of this project is to identify best practices for improving pavement performance on projects involving widening of narrow pavement structures.
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Corporate Authors:
University of Texas, Austin
Center for Transportation Research, 1616 Guadalupe Street
Austin, TX United States 78701-1255Texas Department of Transportation
Research and Technology Implementation Office, P.O. Box 5080
Austin, TX United States 78763-5080Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Murphy, Mike
- Burton, Maria
- Kim, Moo Yeon
- Smit, Andre
- Trevino, Manuel
- Wu, Hui
- Prozzi, Jorge
- Publication Date: 2014
Language
- English
Media Info
- Media Type: Digital/other
- Edition: Project Summary
- Pagination: 2p
Subject/Index Terms
- TRT Terms: Best practices; Decision support systems; Flexible pavements; Pavement performance; Pavement widening; Paving; Road shoulders
- Geographic Terms: Texas
- Subject Areas: Construction; Highways; Pavements; I52: Construction of Pavements and Surfacings;
Filing Info
- Accession Number: 01538127
- Record Type: Publication
- Report/Paper Numbers: 0-6748
- Files: TRIS, ATRI, USDOT, STATEDOT
- Created Date: Sep 25 2014 8:59AM