PAVELOOK

The design traffic in terms of the cumulative number of standard axles to be carried during the design life of the road should be computed using the following equation:

N=365*(1+r)^x *A*D*F/r

Where,

N = Cumulative number of standard axles to be catered for in the design in terms of msa.

A = Initial traffic in the year of completion of construction in terms of the number of Commercial Vehicles Per Day (CVPD).

D = Lane distribution factor (LDF)

F = Vehicle Damage Factor (VDF).

n = Design life in years.

r = Annual growth rate of commercial vehicles in decimal (e.g., for 5 per cent annual growth rate, r = 0.05).

The traffic in the year of completion is estimated using the following formula:

A = P (1 + r)x

Where,

P = Number of commercial vehicles as per last count.

x = Number of years between the last count and the year of completion of construction.