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Psi model for both flexible and rigid pavements. In pavement engineering, it is important to gauge the remaining quality of the road pavement based on its current status. One of the earliest pavement condition indices was (psr) developed at the aasho road test.
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In other words, psr = psi + e. The result of this transformation is shown in figures 13 and 14, where psr values are plotted against r ofile measurement to appear in. Highway research board, “the aasho road test,” report 5, pavement research, special report 61e, publication no.
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954, national research council, washington, d.c., 1962.
The psr was road test by having raters riding in an automobile that indicated the level of. The psi is just a measure of the current overall rating of a section of highway based upon visual observation. What is the present serviceability index (psi)? Unlike the psr, which was a ride quality rating that required a panel of observers to ride in a car over the pavement of interest, the psi does not require a panel of experts.
Following tables show the category group values of pci, iri, psr and psi rate with their sample unit in accordance with the reference of table 1. The pavement quality is estimated by experts on a scale. The scale goes from 5 (perfect). Such information was useful in selecting a “terminal” (or failure) serviceability.
The pavement quality is estimated by experts on a scale from 0 to.
In pavement engineering, it is important to gauge the remaining quality of the road pavement based on its current status.
