St. Louis Work Zones March 26-April 1

ST. LOUIS - Crews with the Improve I-70 Warrenton to Wentzville Project will begin construction of drainage structures and temporary pavement in the median of both directions of Interstate 70 between Wentzville Parkway and the Norfolk Southern Railroad bridge starting overnight Monday, March 30. All work is weather permitting.

Work will run from 9 p.m. to 5:30 a.m. each night. A temporary barrier wall will be in place along the right and left shoulders of eastbound I-70 beginning March 30. Westbound I-70 will have a temporary barrier wall along the left shoulder starting the week of April 6. Lanes in both directions will be reduced to 11-foot width. During overnight hours, there will be left lane closures in both directions.

This work is part of the reconstruction of Interstate 70 with adding a third lane in each direction and the realignment of I-70 between Wentzville Parkway and Route Z.

For more on roadway closures due to construction, additional work zone information, and real-time roadway weather conditions, go to http://traveler.modot.org/map. For real-time traffic, visit www.gatewayguide.com.

Motorists should be aware of the following ongoing closures:

• I-55, St. Louis City, one southbound lane closed from I-44 to north of Bates and two southbound lanes closed north of Bates to north of Weber through early 2026.
• I-55, St. Louis City and County, one northbound lane closed from north of Reavis Barracks to north of Bayless and two northbound lanes closed from north of Bayless to Virginia through early 2026.
• I-55, St. Louis City, the Virginia on ramp to southbound I-55 is closed through early 2026.
• I-55, St. Louis City, the ramp from southbound to Loughborough and the Loughborough on-ramp to southbound will be closed through early 2026.
• I-55, St. Louis City, the ramp from Lafayette/Truman to southbound is closed through early 2026.
• I-55, St. Louis City, the ramp from Germania to northbound is closed through early 2026.
• I-270, St. Louis County, westbound exit ramp to Riverview Drive closed.
• I-270, St. Louis County, on-ramp from Riverview Drive to westbound I-270 closed.
• Route 67, St. Louis County, northbound and southbound Route 67 loop ramps to Route D closed. Route D westbound and eastbound loop ramps to Route 67 closed.
• Route 67, St. Louis County, one northbound and one southbound lane closed at Route D.
• Route AB, St. Louis County, one eastbound and westbound lane closed under I-270.
• Route N, St. Louis County, one lane closed southbound from south of I-70 to Augusta.
• Route N, St. Louis County, one lane permanently closed northbound from Route 115 to Bermuda.
• Route N, St. Louis County, one northbound lane closed from Signal Hill Dr. to Bernhardt Ave.
• I-64, St. Charles County, North Outer Road/Technology Drive bridge closed through spring 2026.
• Route 94, St. Charles County, one left-turn lane for on ramp to eastbound 370 closed.
• Route 370, St. Charles County, two westbound lanes moved to the eastbound Discovery Bridge across the Missouri River until late 2027.
• I-55, Jefferson County, one southbound lane closed at the Meramec River.
• I-55, Jefferson County, three left turn lanes closed at McNutt under the interstate. Traffic will move to the outside lanes. Drivers will be able to make a left turn onto the interstate ramp.
• I-55, Jefferson County, one southbound lane closed between Route 141 and Meramec Bottom until 2027.
• Route 67, Jefferson County, one southbound lane closed at I-55.
• Route Z, Jefferson County, three middle lanes closed in the center of Route Z. All traffic is pushed to the outside lanes.
• Route MM, Franklin County, closed at the Union Pacific Railroad Bridge.

Please see the list of daily road closures, weather permitting:

Thursday, March 26

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• Route 30, St. Louis County, 7 a.m.to 3 p.m., one lane closed eastbound and westbound between I-270 and Seibert Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one eastbound lane closed between Braeshire Drive and Weidman Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Road and Enchanted Parkway.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one lane closed between I-270 and North Office Parkway.
• Route 366, St. Louis County, 6 a.m. to 3 p.m., one eastbound and westbound lane closed between Grant and Laclede Station Road.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed eastbound at I-270.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed westbound at Coeur DeVille Drive. Flaggers will direct traffic through the work zone.
• I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed between I-70 to Route 364.
• I-64, St. Charles County, 8 p.m. to 9 a.m., one westbound lane closed between Route 364 and I-70.
• I-70, St. Charles County, 8 p.m. to 6 a.m., one eastbound and westbound lane closed from Foristell to Wentzville.
• I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound and westbound lane closed from Wentzville Parkway to Route A.
• I-70, St. Charles County, 8 a.m. to 1 p.m., one lane closed westbound between Wentzville Parkway and David Hoeckel Parkway.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.
• Route 21, Jefferson County, 7:30 a.m. to 6:30 p.m., one lane closed between Big River to Route B. Flaggers and a pilot car will direct traffic through the work zone.
• Route 30, Jefferson County, 5 p.m. to 6 a.m., one lane closed between Ridge Road and Route NN. A pilot car will direct traffic through the work zone.

Friday, March 27

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• Route 30, St. Louis County, 7 a.m.to 3 p.m., one lane closed eastbound and westbound between I-270 and Seibert Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one eastbound lane closed between Braeshire Drive and Weidman Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Road and Enchanted Parkway.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one lane closed between I-270 and North Office Parkway.
• Route 366, St. Louis County, 6 a.m. to 3 p.m., one eastbound and westbound lane closed between Grant and Laclede Station Road.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed eastbound at I-270.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed westbound at Coeur DeVille Drive. Flaggers will direct traffic through the work zone.
• I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed between I-70 to Route 364.
• I-64, St. Charles County, 8 p.m. to 9 a.m., one westbound lane closed between Route 364 and I-70.
• I-70, St. Charles County, 8 p.m. to 6 a.m., one eastbound and westbound lane closed from Foristell to Wentzville.
• I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound and westbound lane closed from Wentzville Parkway to Route A.
• I-70, St. Charles County, 8 a.m. to 1 p.m., one lane closed westbound between Wentzville Parkway and David Hoeckel Parkway.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.
• Route 21, Jefferson County, 7:30 a.m. to 6:30 p.m., one lane closed between Big River to Route B. Flaggers and a pilot car will direct traffic through the work zone.
• Route 30, Jefferson County, 5 p.m. to 6 a.m., one lane closed between Ridge Road and Route NN. A pilot car will direct traffic through the work zone.

Saturday, March 28

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.

Sunday, March 29

• There are no scheduled lane closures.

Monday, March 30

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• Route 30, St. Louis County, 7 a.m.to 3 p.m., one lane closed eastbound and westbound between I-270 and Seibert Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Road and Enchanted Parkway.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one lane closed between I-270 and North Office Parkway.
• Route 366, St. Louis County, 6 a.m. to 3 p.m., one eastbound and westbound lane closed between Grant and Laclede Station Road.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed eastbound at I-270.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed westbound at Coeur DeVille Drive. Flaggers will direct traffic through the work zone.
• I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed between I-70 to Route 364.
• I-64, St. Charles County, 8 p.m. to 9 a.m., one westbound lane closed between Route 364 and I-70.
• I-70, St. Charles County, 8 p.m. to 6 a.m., one eastbound and westbound lane closed from Foristell to Wentzville.
• I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound and westbound lane closed from Wentzville Parkway to Route A.
• I-70, St. Charles County, 8 a.m. to 1 p.m., one lane closed westbound between Wentzville Parkway and David Hoeckel Parkway.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.
• Route 21, Jefferson County, 7:30 a.m. to 6:30 p.m., one lane closed between Big River to Route B. Flaggers and a pilot car will direct traffic through the work zone.
• Route 30, Jefferson County, 5 p.m. to 6 a.m., one lane closed between Ridge Road and Route NN. A pilot car will direct traffic through the work zone.

Tuesday, March 31

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• Route 30, St. Louis County, 7 a.m.to 3 p.m., one lane closed eastbound and westbound between I-270 and Seibert Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Road and Enchanted Parkway.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one lane closed between I-270 and North Office Parkway.
• Route 366, St. Louis County, 6 a.m. to 3 p.m., one eastbound and westbound lane closed between Grant and Laclede Station Road.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed eastbound at I-270.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed westbound at Coeur DeVille Drive. Flaggers will direct traffic through the work zone.
• I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed between I-70 to Route 364.
• I-64, St. Charles County, 8 p.m. to 9 a.m., one westbound lane closed between Route 364 and I-70.
• I-70, St. Charles County, 8 p.m. to 6 a.m., one eastbound and westbound lane closed from Foristell to Wentzville.
• I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound and westbound lane closed from Wentzville Parkway to Route A.
• I-70, St. Charles County, 8 a.m. to 1 p.m., one lane closed westbound between Wentzville Parkway and David Hoeckel Parkway.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.
• Route 21, Jefferson County, 7:30 a.m. to 6:30 p.m., one lane closed between Big River to Route B. Flaggers and a pilot car will direct traffic through the work zone.
• Route 30, Jefferson County, 5 p.m. to 6 a.m., one lane closed between Ridge Road and Route NN. A pilot car will direct traffic through the work zone.

Wednesday, April 1

• I-270, St. Louis County, 8 a.m. to 4 p.m., one lane closed on Conway under the interstate. Flaggers will direct traffic through the work zone.
• Route 30, St. Louis County, 7 a.m.to 3 p.m., one lane closed eastbound and westbound between I-270 and Seibert Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Road and Enchanted Parkway.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one lane closed between I-270 and North Office Parkway.
• Route 366, St. Louis County, 6 a.m. to 3 p.m., one eastbound and westbound lane closed between Grant and Laclede Station Road.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed eastbound at I-270.
• Route AB, St. Louis County, 7 a.m. to 3 p.m., one lane closed westbound at Coeur DeVille Drive. Flaggers will direct traffic through the work zone.
• I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed between I-70 to Route 364.
• I-64, St. Charles County, 8 p.m. to 9 a.m., one westbound lane closed between Route 364 and I-70.
• I-70, St. Charles County, 8 p.m. to 6 a.m., one eastbound and westbound lane closed from Foristell to Wentzville.
• I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound and westbound lane closed from Wentzville Parkway to Route A.
• I-70, St. Charles County, 8 a.m. to 1 p.m., one lane closed westbound between Wentzville Parkway and David Hoeckel Parkway.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.
• I-55, Jefferson County, up to three lanes closed northbound between Route 141 and Meramec Bottom.
• Route 21, Jefferson County, 7:30 a.m. to 6:30 p.m., one lane closed between Big River to Route B. Flaggers and a pilot car will direct traffic through the work zone.
• Route 30, Jefferson County, 5 p.m. to 6 a.m., one lane closed between Ridge Road and Route NN. A pilot car will direct traffic through the work zone.

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