Principal component loadings and cumulative variance of the standardized damage response of city road networks: Slope (Zslope), intercept (Zintercept) and r2 ().

In both sets of city road networks, the damage response can effectively be reduced from three to two dimensions. The first component simultaneously encodes a road network’s susceptibility to damage; the second component, smaller in contribution than the first, encodes the unpredictability of the network’s damage response.