The mechanism of budget prioritization for roads maintenance and rehabilitation at uncertainty condition (case study of khorram abad-doroud road)

pavement management system (PMS) is the coordinate and regular process for doing all of the activities in roads. the main purpose of PMS is the prediction of pavement condition and the life cycle cost for determining the suitable time table. by true construction and management, we can provide a true decision making and sustainable maintenance for rehabilitation and reconstruction of the roads. The true construction and management. PMS is the economic method for maintenance of the one of the most important national funds. the aim of this research is that according to the uncertainty of the assigned budgets, the optimum management for M&R methods was done. at this research, the road of Khorramabad-dorood was selected as the case study. the objective function at this research is the promotion of the roads quality according to budget limitations. for calculations, GAMS software has been used. the results show that, how we can prioritize the budget among the several sections.