, Professor, Civil, Environmental and Geo-Engineering
Gary Davis, Professor, Civil, Environmental and Geo-Engineering
Alireza Khani, Assistant Professor, Civil, Environmental and Geo-Engineering
MnDOT has used the remaining service life (RSL) measure for pavement condition for more than a decade. RSL is an estimation of the time until the next major rehabilitation of the pavement section. Using pavement deterioration curves, the time when a pavement section reaches an RQI of 2.5 is predicted and the RSL is simply calculated as the difference between the predicted and the present time. However, it is not clear if this metric by itself can show the "true" condition of the system.
At the end of phase 1, a work plan was developed for a follow up phase 2. The main objectives of this phase 2 are to obtain relevant data to calculate the percent remaining service life interval (PRSI) for different categories of pavements, calculate two additional metrics, Asset Sustainability Ratio and Deferred Preservation Liability, and perform analyses to determine how much time and funding is required to bring the system to a stable configuration of even distribution of PRSI, which allows for more consistent planning.