Fig. 8
(Top) The London metro map with destination Piccadilly station xa highlighted in black. (Bottom) FPT densities for the London metro with travel time distributions \( {\tilde{\psi}}_{x{x}^{\prime }}(s)=1/\left( s\tau +1\right) \); τ = 1 except at a trap node xh at which \( {\tilde{\psi}}_{x_h{x}^{\prime }}(s)=1/\left({s}^{\alpha }{\tau}^{\alpha }+1\right) \); α = 0.5. For each starting stations x0 the FPT density is colored according to the distance from x0 to xa: ∣x0 − xa∣ = 1 (black), ∣x0 − xa∣ = 2 (blue), ∣x0 − xa∣ = 3 (red) (FPT densities with ∣x0 − xa∣ > 3 are shown in grey)