Fig. 3: Differentiated access to PCE for White and Black people in the driving scenario.

The selection method of overrepresented CBGs, the calculation method of accessibility and probability density, and the visualization method of the three graphs are similar as Fig.2. a Visualization of the distribution of PCE accessibility for the overrepresented CBGs of White and Black people. b Probability density curves for the two races for the three categories of PCE accessibility. c Overall PCE accessibility in overrepresented CBGs. The error bars show the 95% confidence interval of the statistical data, and the error bars are equivalent throughout the figure. The Mann–Whitney U test in the nonparametric t-test was used to test whether the difference between the two groups of data was significant, * denotes the degree of significance, i.e., the P value, ***P < 0.001, **P < 0.01, *P < 0. 05, ns means P ≥ 0. 05.