Texas IRI Summary (2000 – 2005)

This paper reports of a statistical analysis done to evaluate the International Roughness Index (IRI) on Texas roads from 2000 to 2005. The objective of the analysis was to identify research focus areas to assist the Texas Department of Transportation (TxDOT) in improving the overall riding quality of the Texas road network. Analyses were done on Asphalt Concrete Pavement (ACP), Continuously Reinforced Concrete Pavement (CRCP) and Jointed Concrete Pavement (JCP) roads. The IRI results from Interstate Highways (IH), United States (US) highways, State Highways and Farm to Market (FM) roads with and without surface treatments are reported in this paper. The analyses indicate that the mean IRI data as measured in the left and right wheel paths of roads using automated inertial profilers are log-normally distributed. IRI as measured in the right wheel path is consistently higher than that measured in the left, in particular for FM roads with surface treatments. ACP generally have the lowest IRI values (highest ride quality) followed by CRCP and the JCP. Findings suggest that significant improvements in the overall ride quality of the Texas roadway network can be achieved by focusing research efforts on FM roads with surface treatments. The use of fine thin hot mix asphalt (HMA) to overlay old surface treatments as well as paving of shoulders on FM roads is recommended.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784408386
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Smit, Andre de Fortier
  • Haggerty, Brett
  • Prozzi, Jorge A
  • Rand, Dale
  • Mikhail, Magdy Y
• Conference:
  • Airfield and Highway Pavements. The 2006 Airfield and Highway Pavement Specialty Conference
  • Location: Atlanta GA, United States
  • Date: 2006-4-30 to 2006-5-3
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 729-740
• Monograph Title: Airfield and Highway Pavements: Meeting Today’s Challenges with Emerging Technologies

Subject/Index Terms

• TRT Terms: Asphalt concrete pavements; Concrete pavements; Continuously reinforced concrete pavements; Hot mix asphalt; Interstate highways; Overlays (Pavements); Pavement performance; Surface course (Pavements); Surface treating
• Identifier Terms: International Roughness Index; Texas Department of Transportation
• Uncontrolled Terms: Road networks
• Geographic Terms: Texas
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01037743
• Record Type: Publication
• ISBN: 0784408386
• Files: TRIS
• Created Date: Dec 1 2006 8:10AM