WASHINGTON – The nation's lifelines – its roads, airports, railways and transit systems – are getting hammered by extreme weather beyond what their builders imagined, leaving states and cities searching for ways to brace for more catastrophes like Superstorm Sandy.

Even as they prepare for a new normal of intense rain, historic floods and record heat waves, some transportation planners find it too politically sensitive to say aloud the source of their weather worries: climate change.

Political differences are on the minds of the American Association of State Highway and Transportation Officials, whose advice on the design and maintenance of roads and bridges is closely followed by states. The association recently changed the name of its Climate Change Steering Committee to the less controversial Sustainable Transportation, Energy Infrastructure and Climate Solutions Steering Committee.