This study aims to investigate the effect of corrective treatments on the life cycle of pavement. An optimum analysis is conducted by using the genetic algorithm to find the optimal M&R plan during a 10 year analysis period for each pavement sector where the objectives are minimizing the total costs and maximizing the average performance throughout the 10 years. Two maintenance policies (MPs) are investigated and compared together; MP1 where the rehabilitation and preventive treatments only are allowed along the 10 years; and MP2 where unlimited application of corrective treatments are allowed besides the rehabilitation and preventive treatments. Moreover, sensitively analysis is conducted to investigate the effect of corrective actions at different weights assigned to the policy objectives. The analysis is conducted at weights (0.2, 0.8), (0.5, 0.5), and (0.8, 0.2) for cost and performance respectively.