Integration of Network- and Project-Level Performance Models for TxDOT PMIS (1727-2)

The main objective of the 1727 project was to "evaluate and recommend improvements to pavement performance prediction models" for the Texas Pavement Management Information System (PMIS). The secondary objective was to strive toward more integration between network and project management levels such that the models used at each level do not contradict each other and result in a loss of confidence by users. The project evaluated models for portland cement concrete and asphalt concrete pavements and developed recommendations. The models for portland cement concrete are described and discussed in Report 1727-1. The models for asphalt pavements are described in that report, but the full evaluation report and recommendations are included in this report. The most important variables for various models were identified and reported in Report 1727-1. This report then develops the recommendations for modifications to the Texas Department of Transportation (TxDOT) PMIS to allow the network- and project-level models to be better integrated. This integration includes modifications to the PMIS software that would store the sigmoidal project parameters for each pavement section. This storage would allow the projection models to use the best available projection parameters, whether they came from a network-level model or a projectlevel model after detailed project level analysis. An approach to implementation is included.