Fig. 3: Relationships between warehouse characteristics and NO2 with truck traffic.
From: Air pollution impacts from warehousing in the United States uncovered with satellite data
A Slope of the linear regression between daily truck vehicle kilometers traveled (VKT) near warehouses versus the number of loading docks, the number of parking spaces scaled by 10, and clustering for decile bins of daily total VKT near warehouses. Hatching represents a bin where the relationship between daily truck VKT and a particular warehouse characteristic is not statistically significant. The distributions from which the slopes are derived are shown in Figure S5. B Same interpretation and statistical analysis as Fig. 2B, but near-warehouse NO2 levels are binned by near-warehouse daily truck VKT for low, medium, and high population density environments.
