In pavement design by IRC:37 (flexible), the design traffic is expressed as:
Choose the correct answer
Total number of vehicles only
Cumulative number of standard axles (80 kN equivalent) in million standard axles (msa) over design life
Peak hour volume per lane
Number of heavy vehicles per day only
Correct Answer
B. Cumulative number of standard axles (80 kN equivalent) in million standard axles (msa) over design life
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IRC:37 (flexible pavement): Design traffic = cumulative standard axles (CSA) in msa (million standard axles) over design life. Standard axle = 80 kN dual wheel (single axle). CSA = 365 × A × (VDF × LDF) × [(1+r)ⁿ − 1]/r where A = initial daily traffic in design lane, VDF = vehicle damage factor, r = growth rate, n = design life.
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