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Question
As per IRC 37: 2018, for Initial (two-way) traffic volume in terms of commercial vehicle per day is 0 - 150, the Vehicle damage factor for Plain/Rolling terrain is
A.
3.9
B.
1.7
C.
5.0
D.
0.6
Answer ( Option B)

1.7

Solution

Vehicle Damage Factor:
• The vehicle damage factor (VDF) is a multiplier to convert the number of commercial vehicles of different axle loads and axle configuration to the number of standard axle load repetitions.
• It is defined as an equivalent number of standard axles per commercial vehicle.
Indicative VDF Values
Initial traffic volume in terms of the number of commercial vehicle per day Terrain
Rolling / Plain Hilly
0 - 150 1.7 0.6
150 - 1500 3.9 1.7
> 1500 5.0 2.8

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