Asset Management

Pavement Health Track Remaining Service Life (RSL) Forecasting Models, Technical Information

Procedure for Computing Pavement RSL

The specific steps that the PHT Tool conducts to determine RSL for a given pavement section are summarized below:

1. Select analysis type and parameters
   1. Analysis type:
      1. Minimum RSL
      2. Weighted average
   2. Analysis parameters:
      1. Assign weighting factors to each distress/IRI to be used to determine overall RSL.
2. Extract from the Highway Performance Monitoring System (HPMS) program and default databases all relevant data for the given pavement section.
3. Determine current age and condition (distress/IRI).
4. Use relevant pavement condition (distress/IRI) models to forecast future pavement condition (distress/IRI). The predicted future distress/IRI is adjusted using actual distress/IRI data if available in HPMS. This ensures that current pavement condition is projected into the future, minimizing potential errors in future condition predictions.
5. Determine pavement age at which each individual distress/IRI threshold value is attained.
6. Estimate RSL for each individual performance measure (distress/IRI) of interest.
7. Determine overall pavement section RSL (note that computed RSL cannot be greater than the maximum pavement service life)
   1. Minimum RSL
   2. Weighted value.
8. Generate reports and graphs as needed
   1. Histograms
   2. GIS plots.