Pavements & traffic · Pavement design
Design traffic (ESA) for pavements calculator
Cumulative heavy vehicle axle groups and ESAs over the design period with compound growth.
Standard: Austroads AGPT02 (design traffic)
Open the live calculator → All pavements & traffic calculators
Inputs in the worked example
The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.
| Input | Value | Unit |
|---|---|---|
| AADT (both directions) | 8000 | veh/day |
| Heavy vehicles | 10 | % |
| Direction factor | 0.5 | |
| Lane distribution factor | 1 | |
| Annual growth | 3 | % |
| Design period | 20 | yr |
| Axle groups per HV | 2.8 | |
| ESA per HVAG | 0.9 |
Worked example — results
| Result | Value | Unit |
|---|---|---|
| CGF = ((1 + R)^P − 1)/R | 26.87 | |
| Cumulative HVAG | 10,984,609 | |
| Design ESA | 9,886,148 | ESA |
- ✓ DESA computed
Method, formulas and assumptions
- CGF = ((1 + R)^P − 1)/R = IF(3=0,20,((1+3/100)^20-1)/(3/100)) = 26.87
- Cumulative HVAG = 365*8000*0.5*10/100*1*26.87*2.8 = 1.098e+7
- Design ESA = 1.098e+7*0.9 = 9.886e+6 ESA
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.