Since the LR1132 approach maximises the use of the existing pavement’s
strength, a pavement of more uniform strength will result. In addition, as deterioration can be predicted without too much difficulty, ultimate reconstruction
can be more easily planned. This definition of design life results in LR1132
designing a pavement having an additional period of serviceable life before
major reconstruction, a period that would not be available if Road Note 29 were
used