Appendix C 4.2 Traffic Data
Traffic – 2000 AADT, including 25% heavy vehicles consisting of:
- standard heavy vehicles = 15% (SHV)
- large heavy vehicles = 10% (LHV).
The road section is two-lane, two-way, with an even split of traffic in each direction, over a width of 7.6 m. Thus the design traffic is 2000/2 = 1000 v/l/d.
Using Equation 2 (Section 5.2.5), EHV (%) can be calculated for the trafficked lanes:
| EHV (%) | = | SHV(%) + (LHV(%) x 3) |
| = | (15) + (10 x 3) | |
| = | 45%. |
A traffic volume of < 100 v/l/d (with 0 EHV(%)) will be adopted for the shoulders.