Figure 7-1: Tier 2 assessment of local impacts
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Significant links and intersections with potential exposure, as identified in tier 1 assessment
If necessary, select worst cases for assessment.
Tier 2 methodology to estimate traffic-derived concentration of air pollutants at relevant receptors
- 24-hr, 8-hr and 1-hr traffic flows
- Average speed/LOS
- Percentrage heavy duty
- Distance to receptor
- Basic topography
Step 1. Is the proposal within an NES airshed that breaches the ambient air quality standards?
If yes, consult regional council prior to finalising the assessment and then follow Step 2.
If no, follow step 2.
Step 2. Do any predicted concentrations exceed the signfiance criteria (Table 7-2)?
If yes, Process with Tier 3 assessment
If no, record outcomes in Assessment report.
