Estimating coastal flood damage costs to transit infrastructure under future sea level rise

Abstract Future sea level rise (SLR) and associated increases in the frequency intensity of coastal flooding poses significant threats to communities transit systems. Yet current literature practice lack methods for estimating flood damage costs Here, we construct an event-specific cost estimation framework systems, simulating separately ingress into underground spaces. We apply this MBTA rail system Boston, damages under several events with SLR project expected annualized losses (EAL) through 2100 uncertain SLR. estimate EALs have doubled since 2008 $24.4 M/year are reach $58 by 2030 all scenarios. Our results suggest that absent adaptation schemes, particularly at tunnel locations, risk will continue accelerate, potentially resulting permanent inundation low-lying sections system.