A stratified two-stage sampling survey is described that was selected for use in Texas to obtain cost-effective objective information on road-network performance. The sample was obtained by first randomly selecting counties within each highway district and then randomly selecting 3.2-km (2-mile) highway segments within each county. Approximately 1 percent of total statewide centerline kilometers were sampled by using the technique. Various kinds of data were obtained for each of the sampled highway segments; serviceability index and pavement rating score (visual condition) are used as examples to demonstrate the kinds of inferences that can be made. The type and size of sampling survey that should be used are examined. To make these determinations, one highway district was used in conjunction with a simulation procedure. The results of the simulation study and two separate optimization procedures revealed that two-stage sample sizes, generally about 2 percent of total centerline kilometers, provided good estimates for determining roughness, visual condition, deflection, and skid resistance. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 45-52
  • Monograph Title: Pavement distress, evaluation, and performance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00302409
  • Record Type: Publication
  • ISBN: 0309029627
  • Files: TRIS, TRB
  • Created Date: Jan 30 1980 12:00AM