Table 1 Summary of traffic metrics
| Â | Metric | Type of metric | Data source | Interpretation |
|---|---|---|---|---|
1 | Kernel density | Point pattern | MRWA | High vs low traffic area based on locations of monitoring sites |
2 | Distance-weighted traffic density (All traffic, Truck traffic) | Weighted traffic counts | Video monitoring | Vehicle kilometres travelled per peak traffic hour weighted by a pollutant decay function of distance |
3 | Distance to nearest major road | Linear distance | EDIS MRWA | Distance to nearest road carrying more than 15,000 vehicles per day |
4 | Road length Road density | Road characteristics | Â | Length of road or density of road within a circular buffer |