It is proposed to widen and strength and 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 5 per cent. Given : traffic growth rate for CV = 8 per cent, 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