The Iowa Department of Transportation,  as a courtesy to the Nebraska Department of Roads has announced the Westbound Interstate 80 will be closed at midnight Tuesday, June 12th, until 5 a.m.-Wednesday, June 13th, at the I-80/I-29 interchange in Council Bluffs. The closure is necessary for sign maintenance. Travelers will follow a marked detour utilizing I-29 and I-480. Also on Tuesday evening, the 13th Street entrance and loop ramps to westbound I-80 will be closed beginning at 8 p.m. until 5 a.m. Wednesday morning, June 13. Both west- and eastbound I-80 will have lane closures between 13th and 20th streets in Omaha.