2. [10 Marks] Briefly describe the concepts of PSI, preventive maintenance and pavement preservation. 3. [10 Marks] Brie
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2. [10 Marks] Briefly describe the concepts of PSI, preventive maintenance and pavement preservation. 3. [10 Marks] Brie
2. [10 Marks] Briefly describe the concepts of PSI, preventive maintenance and pavement preservation. 3. [10 Marks] Briefly describe the four common pavement design approaches.
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