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1. [15 points] A flexible pavement is to be designed to last 10 years. The initial PSI is 4.2 and the TSI (the final PSI) is determined to be 2.5. For design, the passenger car traffic is 30,000 with two 2,000-lb single axles, and the daily truck traffic consists of 1000 passes of single- unit trucks with two single axles (8,000-lb steering and 22,000-lb drive, respectively) and 350 passes of tractor semi-trailer trucks with 10,000-lb single, 16,000-lb tandem, and 44,000- Ib triple axles. Assuming a structure number of 4. determine the cumulative ESALs for the flexible pavement. 2. [15 points] For the pavement design in Example 1, with the assumed structure number of 4, M, and M3 are equal to 1.0 for the materials in the pavement structure. Four inches of hot- mix asphalt (HMA) is to be used as the wearing surface and 10 inches of crushed stone as the subbase. Determine the thickness required for the base if soil cement is the material to be used. 1. [15 points] A flexible pavement is to be designed to last 10 years. The initial PSI is 4.2 and the TSI (the final PSI) is determined to be 2.5. For design, the passenger car traffic is 30,000 with two 2,000-lb single axles, and the daily truck traffic consists of 1000 passes of single- unit trucks with two single axles (8,000-lb steering and 22,000-lb drive, respectively) and 350 passes of tractor semi-trailer trucks with 10,000-lb single, 16,000-lb tandem, and 44,000- Ib triple axles. Assuming a structure number of 4. determine the cumulative ESALs for the flexible pavement. 2. [15 points] For the pavement design in Example 1, with the assumed structure number of 4, M, and M3 are equal to 1.0 for the materials in the pavement structure. Four inches of hot- mix asphalt (HMA) is to be used as the wearing surface and 10 inches of crushed stone as the subbase. Determine the thickness required for the base if soil cement is the material to be used

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