The Illinois Department of Transportation is suspending nonemergency road work during the holiday weekend to ease traffic congestion.
Officials also released locations of lanes under construction that will remain closed.
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The work suspension will mean more traffic lanes will remain open. It starts at 3 p.m. Friday and runs through Monday.
Transportation Secretary Ann Schneider says the work stoppage will "improve traffic flow and kick-start the heavily traveled weekend."
She urges motorists to slow down, obey the speed limit and drive cautiously through work zones.
Posted work-zone speed limits remain in effect even where no construction workers are present.