The increasing electrification of urban transportation

i.e.

subways and electric vehicles (EV)

brings more interactions between the power system and transportation system and further results in fault propagation across them. To analyze vulnerability of the coupling system under extreme events

this paper establishes a multilayer urban electric-transportation interdependent network (ETIN) model. First

a weighted coupled metro-road traffic network (CTN) model and network path planning approach are proposed. A prospect theory-based failure load redistribution (FLR) method is further established to account for uncertainty of TN link capacity affected by power supply. Second

topology and emergency control strategy of power network (PN) are modeled

followed by formulation of multilayer ETIN model. In particular

the inter-layer fault propagation from PN to TN is modeled based on power supply correlation strength

while from TN to PN is modeled based on traffic flow. A few indexes are then defined to quantify vulnerability of ETIN under deliberate attack. Finally

the proposed method is verified on an electric-transportation system to show influence of fault propagations within ETIN on its vulnerability under extreme events.