Table 1. Hyperparameters and Corresponding β for the Final LUR Model.

final LUR model
variable	range (km)	β̂ (μg/m3 per variable unit)
intercept	NA	7.54 × 1000
elevationa	0	–8.87 × 10–04
total trafficb	694	3.04 × 10–03
average congestionc	33	2.54 × 10–05
emission efficienyd	730	–1.76 × 10–02
SO2e	210	1.10 × 10–04
NH3e	11.5	1.49 × 10–06

^aMeters.

^bkm driven/km².

^ckm driven/km.

^dPeople/km².

^eThousand tons/year.