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Table 2 Estimated pollution levels associated with residential locations and different road classes

From: Spatial variations in estimated chronic exposure to traffic-related air pollution in working populations: A simulation

Location   Annual average hourly NO2 (μg/m3)
based on the LUR estimate
  percent min max mean sd
Residences 100 6 56 28 8
   freeway/highway/arterial/ramp 17 15 56 34 9
   Collector 17 2 56 26 8
   local/strata/lane 66 2 56 26 8
   Rural 0.2 11 39 19 5