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  1. The following data pertains to the number of commercial vehicles per day for the design of a flexible pavement for a national highway as per IRC:37–1984

    Assuming a traffic growth factor of 7.5% per annum for both the types of vehicles, the cumulative number of standard axle load repetitions (in million) for a design life of ten years is
    1. 44.6
    2. 57.8
    3. 62.4
    4. 78.7
Correct Option: B

Cumulative standard axle:
(1) 2 axle truck :

= 51.6 msa
(2) Tandem axle truck:

= 6.2 msa
Total CSA = 51.6 + 6.2 = 57.8 msa



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