The Norman Transcript

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November 23, 2012

Extreme weather tough on transportation system

(Continued)

WASHINGTON —

In Washington state, “we have seen more erratic weather patterns that we haven’t had before, so we really can’t imagine what kind of winter or summer we’re going to have anymore,” Hammond said.

More frequent heavy rainfalls in the western half of the state have increased the volume and velocity of water in rivers and streams, undermining the foundations of bridges. Rising sea levels are eroding coastal roads. In the drier eastern half of the state, more frequent wildfires have forced road maintenance crews to change their methods in an effort to prevent sparks that might cause a blaze.

“Each time you replace a bridge, states have to be thinking about not just what kind of traffic demand there is, but how do I make sure this is a bridge that will withstand the future given the erratic weather patterns and climate change we’re seeing,” Hammond said. “It’s a new layer of analysis.”

About half the states have taken some steps toward assessing their most critical vulnerabilities, experts said. But few have gone to the next step of making preparations. New York was an exception. Not only had transit officials made detailed assessments of the potential effects of climate change, but they’d started to put protections in place. Subway entrances and ventilation grates were raised in low-lying areas to reduce flooding, but that effort was overwhelmed by Sandy.

“They got hit with what was even worse than even their worst-case scenario,” said Deron Lovaas, a transportation expert with the Natural Resources Defense Council, an environmental group. “This was an active test of ... climate preparedness, and they failed.”

While more than 97 percent of the scientists who publish peer-reviewed research say that global warming is real and man-made, the issue remains highly charged. In conservative states, the term “climate change” is often associated with left-leaning politics.

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