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Design Inputsyr
veh/day
%
Design Traffic
Design MSA
—
Million Std. Axles
Design Life
—
years
Subgrade CBR
—
%
Traffic CVPD
—
veh/day
Pavement Layer Design
Calculation Summary
IRC 37:2018 Notes:
• Design traffic N = 365 × A × [(1+r)ⁿ − 1]/r × D × F (in MSA)
• A = initial CVPD, r = growth rate, n = design life, D = LDF, F = VDF
• Layer thicknesses from IRC 37 design catalogues (CBR vs MSA charts)
• Pavement layers: Wearing Course + Binder + Base + GSB (+ Sub-base if semi-rigid)
• Design traffic N = 365 × A × [(1+r)ⁿ − 1]/r × D × F (in MSA)
• A = initial CVPD, r = growth rate, n = design life, D = LDF, F = VDF
• Layer thicknesses from IRC 37 design catalogues (CBR vs MSA charts)
• Pavement layers: Wearing Course + Binder + Base + GSB (+ Sub-base if semi-rigid)