Modeling of performance for road structure rutting and cracking based on data from the Swedish LTPP database

Markus Svensson

Roads are in a state of constant form of degradation due to factors such as climate and heavy traffic loads and are therefore constructed to have a certain lifetime before being reconstructed. To minimize the cost of construction and reconstruction, robust models for predicting their performance are needed. The aim for this project is to develop prediction models for flexible pavement structures for initiation and propagation of fatigue cracks in the bound layers and rutting for the whole structure. The models are based on observations from the Swedish Long Term Pavement Performance (LTPP) database. The intention is to use the models for planning maintenance as a part of a pavement management system (PMS). A statistical approach is used for the modeling where both cracking and rutting are related to traffic data, climate conditions and the subgrade characteristics as well as the pavement structure. The results for one arterial road are then shown.

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