Westbound Interstate 55/64 will be closed starting in East St. Louis on Friday evening, the Illinois Department of Transportation says.
The closure is so workers can install a drainage system under the highway.
To get around the closure, weather permitting:
▪ Interstate 55 detour is to take Interstate 255 south, across the Jefferson Barracks Bridge, to Interstate 55 in Missouri
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▪ Interstate 64 will detour by taking Interstate 255 south to Illinois 3 north to westbound Interstate 64.
IDOT advises motorists take alternate routes from 7 p.m. Friday to 5 a.m. Monday.