Roads are made of layers
Use these products for each layer:
Subgrade Clean fill Type A VicRoads specification
Subbase 20mm Class 3 VicRoads specification
Base 20mm Class 1 or 2 VicRoads Specification
Surface 7,10,14 or 20mm Spray Sealed Aggregates
How do I build it?
For roads, it is always best to engage an experienced contractor
How much do I need?
Work out the cubic metres then multiply it by 1.5 for loose tonnes volume or 2.4 for compacted tonnes volume.
How do I work out cubic metres?
Multiply length x width x depth. ie: 100m x 3m x 100mm is 100 x 3 x .1 = 30m3
30m3 x 1.5 = 45 tonnes of loose material
30m3 x 2.4 = 72 tonnes of fully compacted material