Figure 3


Variation of inflow of trips in ZIP codes for different income groups (top) and variation of inflow of trips in ZIP codes for different racial-ethnic groups (bottom). In-degree values, or inflow measure of trips, are normalized for each group to account for uneven distribution. The vertical black line is the week that NPI shelter-in-place was implemented in each county, and, if applicable, the vertical gray line is the week that NPI shelter-in-place was lifted. The percentage of each racial-ethnic group, except Hispanic which overlaps, totals to 100% population.