Late last month, highway and public safety workers set up barricades along Interstate 37 between Corpus Christi and San Antonio. Their objective: to reverse the flow of southbound lanes to provide a hypothetical escape route for thousands of people fleeing a fictional hurricane.

In six hours, the 240 workers cleared the stretch and reversed its traffic flow, which would have allowed more Nueces County residents to flee north ahead of the “storm.”

The drill, part of the Texas Department of Transportation’s annual hurricane season preparations, went off without a hitch, according to Gilbert Jordan, TxDOT’s emergency management coordinator ...

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