DESCRIPTION AND EVALUATION OF ALASKA'S PAVEMENT RATING PROCEDURE

Pavement condition rating methods used on Alaska's roadways since 1978 are described and examined. The methods are intended to provide the specific performance data necessary to optimize construction and maintenance planning and the allocation of available funds. Rating elements include simplified measurements of ride roughness, fatigue (alligator) cracking, patching, and rut depth. These features are reported individually and are also combined with traffic data to indicate more general levels of roadway serviceability. Field evidence shows that a high degree of variability exists in the measurement of cracking, patching, and rutting. Coefficients of variation above 20 percent were estimated for each type of rating element from experimentally repeated measurements. On a given road section estimates of fatigue cracking made by 15 crews differed by up to twice the calculated average. Rut depth measurements were typified by calculated standard deviations of about half the mean value. Report findings suggest that great care be exercised on future pavement performance inventories. Standardization techniques are suggested that should improve manual rating methods. Mechanized or electronic data acquisition techniques must be developed to eliminate human error.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 61-72
  • Monograph Title: Pavement management and evaluation
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00387128
  • Record Type: Publication
  • ISBN: 0309036542
  • Files: TRIS, TRB
  • Created Date: Aug 30 1984 12:00AM