NETWORK SAMPLING TO ESTIMATE DISTRIBUTION OF PAVEMENT CONDITION AND COSTS.

In this paper are presented the results of a study of data from a 1982 survey of the total mileage of three distinct networks in Texas that was undertaken to answer several questions concerning the accuracy that can be achieved with different sample sizes. It is found that the sample size required to estimate the distribution of pavement scores to a given degree of accuracy is smaller than the sample size that must be used to estimate the average cost of maintenance and rehabilitation to the same level of accuracy. The relative sizes found are presented in tables and figures and differ among classes of highway: Interstate, U. S. , state, and farm-to-market. Several convenient relations were found among the mean pavement score and the variance of pavement scores, percentage of pavements needing no repairs, average costs per square yard, and percentage of pavements needing no repairs, average costs per square yard, and percentage error in the estimated average costs.

NETWORK SAMPLING TO ESTIMATE DISTRIBUTION OF PAVEMENT CONDITION AND COSTS. Academic Article