1. The impacts from sea level rise and storm surge, extreme weather events, higher 14 temperatures and heat waves, precipitation changes, Arctic warming, and other 15 climatic conditions are reducing the reliability and capacity of the U.S. 16 transportation system in many ways. 17 2. Sea level rise, coupled with storm surge, will continue to increase the risk of major 18 coastal impacts, including both temporary and permanent flooding of airports, 19 ports and harbors, roads, rail lines,

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... s, and bridges. 20 3. Extreme weather events currently disrupt transportation networks in all areas of 21 the country; projections indicate that such disruptions will increase. 22 Chapter 5 : Transportation 1 Key Message Process: See key message #1. 2 Key message #2/4 Sea level rise coupled with storm surge will continue to increase the risk of major coastal impacts, including both temporary and permanent flooding of airports, ports and harbors, roads, rail lines, tunnels, and bridges. Description of evidence base Estimates of sea level rise are documented in Ch. Key Message Process: See key message #1. 2 Key message #4/4 Climate change impacts will increase costs to transportation systems and their users, but these impacts can be reduced through rerouting, mode change, and a wide range of adaptive actions.