Determine the total thickness of flexible pavement (in mm) for a two-lane undivided carriageway using the following data:

Design CBR value of subgrade = 5.0%, Initial traffic on completion of construction = 300 commercial vehicles per day, Average growth rate = 5.0 % per year, Design life = 10 years and Vehicle Damage Factor value of 2.5.

For CBR value of 5% the total thickness of the pavement for different value of cumulative standard axles is given below:

Cumulative standard axles (msa)	Total thickness of the pavement (mm)
1	430
2	490
3	530
5	580