A configuration where transportation and government officials will temporarily shift a freeway or other highway into one-way traffic. Generally contraflow options are available along Interstate highways leading away from coastal areas in the Gulf Coast and Southeastern States during hurricane evacuation situations. Contraflow utilizes temporary slip ramps located within a freeway median to dispurse traffic onto both carriageways. A series of barricades close ramps to opposing traffic while folded signs are used at on-ramps repurposed as off-ramps during contraflow.
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