TUCSON, Ariz. (Ivanhoe Newswire) -- In most American cities, gridlock is a fact of life -- but don’t blame it all on that daily commute. Sometimes, it’s the unexpected. Natural disasters and other emergencies can create huge traffic jams. In fact, hurricanes Katrina and Gustav both forced 2 million people out of their homes. Now, scientists and engineers may have a solution to evacuation chaos.

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