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It is proposed to widen and strengthen an existing 2-lane NH section as a divided highway. The existing traffic in one direction is 2500 commercial vehicles (CV) per day. The construction will take 1 year. The design CBR of soil subgrade is found to be 4 percent. Given: traffic growth rate for CV = 8 percent, vehicle damage factor = 3.5 (standard axles per CV), design life = 10 years and traffic distribution factor = 0.75. The cumulative standard axles (msa) computed are
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- 35
- 37
- 65
- 70
- 35
Correct Option: D
Cumulative axle load, (CSA)
Ns = | × F | |
r |
= | 365 × 3750 × | 1 + | 10 | - 1 | × 3.5 ≈ 70 msa | |||||
100 | ||||||||||
100 |