St. Louis Work Zones September 4-10

ST. LOUIS — Crews with the Improve I-70 Warrenton to Wentzville Project will begin shifting the eastbound lanes of Interstate 70 at Wentzville Parkway overnight starting at 9 p.m. Friday, September 5. All work is weather permitting.

The traffic shift will start on eastbound I-70 just west of Wentzville Parkway and continue through the curve on I-70 between Wentzville Parkway and Route Z. Barrier wall will be installed on the right shoulder of eastbound I-70. Lanes will be reduced to 11-foot width lanes as the interstate is realigned between Wentzville Parkway and Route Z. The lane shift will remain in place through 2026.

This work is part of the Improve I-70 Warrenton to Wentzville Project, which covers the eastern portion of I-70. It was awarded in November 2024, and construction will continue through 2028.

For real-time roadway weather conditions, go to http://traveler.modot.org/map. For real-time traffic, visit Welcome to Gateway Guide! | Missouri Department of Transportation (modot.org). All work is subject to change and may be shifted due to inclement weather.

 

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 2025.
  • 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 2025.
  • I-55, St. Louis City, the ramp from Virginia to southbound is closed through December 2025.
  • I-55, St. Louis City, the ramp from southbound to Loughborough and the Loughborough on-ramp to southbound will be closed through December 2025.
  • I-55, St. Louis City, the ramp from Lafayette/Truman to southbound is closed through 2025.
  • I-55, St. Louis City, the ramp from Germania to northbound is closed through 2025.
  • I-55, St. Louis City, the ramp from southbound to Germania is closed through 2025.
  • I-40, St. Louis County, Conway Rd. closed at North Outer 40 intersection.
  • I-270, St. Louis, County, one northbound lane closed at I-44.
  • I-270, St. Louis County, various northbound and southbound lanes narrowed between I-64 and Olive through late 2025.
  • I-270, St. Louis County, Conway closed under I-270 through fall 2025.
  • 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.
  • I-270, St. Louis County, the ramp from eastbound to southbound I-170 will be closed through September.
  • Route 21, St. Louis County, one northbound and southbound lane closed between Gravois Creek and Grant’s Trail.
  • Route 21, St. Louis County, one lane northbound and southbound will be closed Musick to Tesson Creek Estates through late 2025.
  • Route 67, St. Louis County, one northbound and southbound lane close over Coldwater Creek.
  • 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 67, St. Louis County, one lane closed from Washington to Ferdinand.
  • Route 141, St. Louis County, one southbound lane closed at I-64 through 2025.
  • Route 141, St. Louis County, starting at 9 p.m. Tuesday, Sept. 4, one northbound lane closed at I-70.
  • Route 141, St. Louis County, starting at 9 p.m. Tuesday, Sept. 4, one southbound lane closed north of I-70 to just south of I-70.
  • 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.
  • Route AC, St. Louis County, one northbound and one southbound lane closed at Maline Creek (just south of Lucas & Hunt).
  • I-64, St. Charles County, two westbound lanes closed on the Daniel Boone Bridge over the Missouri River. One westbound lane remains on the westbound bridge and two westbound lanes shifted to the eastbound bridge through December 2025.
  • I-64, St. Charles County, North Outer Road/Technology Drive bridge closed through 2025.
  • Route 61, St. Charles County, the ramp from southbound to westbound I-70 closed through October.
  • Route K, St. Charles County, one lane on and the ramp to eastbound I-64 closed through September.
  • Route 100, Franklin County, one eastbound lane closed on the Eastern Missouri Railroad bridge near Villa Ridge through early September 2025.
  • I-55, Jefferson County, intersection of I-55 and Route 67 closed.
  • I-55, Jefferson County, one lane of northbound/southbound I-55 closed from Route 67 to Route Z.
  • 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, the ramp from southbound Route 67 to southbound I-55 will be closed through September 2025.
  • I-55, Jefferson County, one lane closed on Herky Horine Road under southbound through October.
  • 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, Jefferson County, closed between Route T and Coleman Rd.

 

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

 

Thursday, September 4

  • I-170, St. Louis County, 8:30 p.m. to 5 a.m., one southbound lane closed from Scudder Road to Route 115 and one lane and ramp under the westbound I-70 overpass closed.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane between I-270 and Butler Hill Road.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lindbergh and Green Park.
  • Route 61/67, St. Louis County, 8 a.m. to 3:30 p.m., one southbound and northbound lane closed from the Conway/German Intersection to Conway Road.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Highway OO and Booness Lane. A pilot car will help direct traffic through the work zone.
  • Route 100, St. Louis County, 9 p.m. to 5 a.m., the ramp from westbound Route 100 to Route 109 and the ramp from eastbound Route 100 to Route 109 closed.
  • Route 109, St. Louis County, 6 a.m. to 3 p.m., one northbound and southbound and eastbound and westbound lane closed at Route 109 & CC intersection.
  • Route 115, St. Louis County, 7 p.m. to 5 a.m., one lane closed eastbound and westbound from I-170 to Hanley.
  • Route 141, St. Louis County, 7 p.m. to 5 a.m., up to two lanes closed between Conway and South Woods Mill Rd.
  • Route 255, St. Louis County, 8 p.m. to 5 a.m., one westbound lane closed from Koch Rd. to I-55.
  • Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between Warson and I-170.
  • Route AB, St. Louis County, 9 a.m. to 3 p.m., one lane closed at Bonhomme Creek. Flagging operation will be in place to help direct traffic.
  • I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed from I-70 to Route K.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound lane closed from Wentzville Parkway to Route A.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one lane closed westbound from Route Z to Route A.
  • Route 370, St. Charles County, 9 a.m. to 3 p.m., one westbound lane closed at bike lane.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed between Independence Drive to Route BB.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed from Gasconade/Franklin County line to Route C.
  • Route 100, Franklin County, 7 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound/westbound lane closed from Route OO to I-44 Washington exit. Flaggers will direct traffic through the work zone.
  • Route KK, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route C and Route 185. Flaggers will direct traffic through the work zone.
  • Route MM, Franklin County, 6 a.m. to 4 p.m., one lane closed between Beauty Dr. and Purina Farms.
  • I-55, Jefferson County, 9 p.m. to 5 a.m., one southbound lane closed from McNutt to Route A. The southbound ramp to Route A will also be closed.
  • Route A, Jefferson County, 7 p.m. to 5 a.m., the bridge over I-55 will be closed in one direction (eastbound and westbound) at a time.

 

Friday, September 5

  • I-170, St. Louis County, 9 p.m. to 6 a.m., one southbound lane closed from Scudder Road to Route 115 and one lane and ramp under the westbound I-70 overpass closed.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane between I-270 and Butler Hill Road.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lindbergh and Green Park.
  • Route 61/67, St. Louis County, 8 a.m. to 3:30 p.m., one southbound and northbound lane closed from the Conway/German Intersection to Conway Road.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Highway OO and Booness Lane. A pilot car will help direct traffic through the work zone.
  • Route 109, St. Louis County, 6 a.m. to 3 p.m., one northbound and southbound and eastbound and westbound lane closed at Route 109 & CC intersection.
  • Route 115, St. Louis County, 7 p.m. to 5 a.m., one lane closed eastbound and westbound from I-170 to Hanley.
  • Route 141, St. Louis County, 7 p.m. to 5 a.m., up to two lanes closed between Conway and South Woods Mill Rd.
  • Route 340, St. Louis County, 9 a.m. to 12 p.m., one eastbound and westbound lane closed between Warson and I-170.
  • I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed from I-70 to Route K.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound lane closed from Wentzville Parkway to Route A.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one lane closed westbound from Route Z to Route A.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed between Independence Drive to Route BB.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed from Gasconade/Franklin County line to Route C.
  • Route 100, Franklin County, 7 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound/westbound lane closed from Route OO to I-44 Washington exit. Flaggers will direct traffic through the work zone.
  • Route KK, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route C and Route 185. Flaggers will direct traffic through the work zone.
  • Route MM, Franklin County, 6 a.m. to 4 p.m., one lane closed between Beauty Dr. and Purina Farms.
  • Route A, Jefferson County, 7 p.m. to 5 a.m., the bridge over I-55 will be closed in one direction (eastbound and westbound) at a time.

Saturday, September 6

  • I-170, St. Louis County, 9 p.m. to 8 a.m., one southbound lane closed from Scudder Road to Route 115, and one lane and ramp under the westbound I-70 overpass closed.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Highway OO and Booness Lane. A pilot car will help direct traffic through the work zone.
  • Route 255, St. Louis County, 12 a.m. Saturday, September 6 until 5 a.m. Monday, September 8, one westbound lane closed from Koch Rd. to I-55.

Sunday, September 7

  • Route 255, St. Louis County, 12 a.m. Saturday, September 6 until 5 a.m. Monday, September 8, one westbound lane closed from Koch Rd. to I-55.

Monday, September 8

  • I-64, St. Louis City, 9 a.m. to 3 p.m., the ramp from Market Street to westbound I-64 closed.
  • I-170, St. Louis County, 8:30 p.m. to 5 a.m., one southbound lane closed from Scudder Road to Route 115 and one lane and ramp under the westbound I-70 overpass closed.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane between I-270 and Butler Hill Road.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lindbergh and Green Park.
  • Route 61/67, St. Louis County, 8 a.m. to 3:30 p.m., one southbound and northbound lane closed from the Conway/German Intersection to Conway Road.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Route OO and Pond Road.
  • Route 100, St. Louis County, 9 a.m. to 3 p.m., one eastbound lane closed between Barrett Station Road and I-270.
  • Route 109, St. Louis County, 6 a.m. to 3 p.m., one northbound and southbound and eastbound and westbound lane closed at Route 109 & CC intersection.
  • Route 115, St. Louis County, 7 p.m. to 5 a.m., one lane closed eastbound and westbound from I-170 to Hanley.
  • Route 255, St. Louis County, 12 a.m. Saturday, September 6 until 5 a.m. Monday, September 8, one westbound lane closed from Koch Rd. to I-55.
  • Route 267, St. Louis County, 5 a.m. to 2 p.m., one northbound lane closed from Mehlville Court to Buckley.
  • Route AB, St. Louis County, 9 a.m. to 3 p.m., one lane closed at Bonhomme Creek. Flagging operation will be in place to help direct traffic.
  • I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed from I-70 to Route K.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound lane closed from Wentzville Parkway to Route A.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one lane closed westbound from Route Z to Route A.
  • Route 370, St. Charles County, 5 p.m. to 5 a.m., one eastbound lane closed from Elm Point to Missouri River.
  • I-44, Franklin County, 9 p.m. to 11 p.m., the westbound exit ramp to St. Clair rest stop closed.
  • I-44, Franklin County, 11 p.m. to 1 a.m., the westbound exit ramp to St. Clair rest stop closed.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed between Independence Drive to Route BB.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed from Gasconade/Franklin County line to Route C.
  • Route 100, Franklin County, 7 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound/westbound lane closed from Route OO to I-44 Washington exit. Flaggers will direct traffic through the work zone.
  • Route KK, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route C and Route 185. Flaggers will direct traffic through the work zone.
  • Route MM, Franklin County, 6 a.m. to 4 p.m., one lane closed between Beauty Dr. and Purina Farms.
  • Route A, Jefferson County, 7 p.m. to 5 a.m., the bridge over I-55 will be closed in one direction (eastbound and westbound) at a time.

Tuesday, September 9

  • I-64, St. Louis City, 6 a.m. to 2 p.m., one eastbound lane closed at 22nd through 6th
  • I-64, St. Louis City, 9 a.m. to 3 p.m., one westbound lane closed from Broadway to 22nd.
  • I-64, St. Louis City, 9 a.m. to 3 p.m., the ramp from Market Street to westbound I-64 closed.
  • I-70, St. Louis City, 10 p.m. to 12 a.m., the exit ramp to West Florissant (Exit 245B) closed.
  • I-170, St. Louis County, 8:30 p.m. to 5 a.m., one southbound lane closed from Scudder Road to Route 115 and one lane and ramp under the westbound I-70 overpass closed.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane between I-270 and Butler Hill Road.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lindbergh and Green Park.
  • Route 61/67, St. Louis County, 8 a.m. to 3:30 p.m., one southbound and northbound lane closed from the Conway/German Intersection to Conway Road.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Route OO and Pond Road.
  • Route 100, St. Louis County, 9 a.m. to 3 p.m., one eastbound lane closed between Barrett Station Road and I-270.
  • Route 109, St. Louis County, 6 a.m. to 3 p.m., one northbound and southbound and eastbound and westbound lane closed at Route 109 & CC intersection.
  • Route 115, St. Louis County, 7 p.m. to 5 a.m., one lane closed eastbound and westbound from I-170 to Hanley.
  • Route 267, St. Louis County, 5 a.m. to 2 p.m., one northbound lane closed from Mehlville Court to Buckley.
  • Route 340, St. Louis County, 8 p.m. to 6 a.m. and 9 a.m. to 3 p.m., one eastbound and westbound lane closed between Warson and I-170.
  • Route 366, St. Louis County, 6 a.m. to 3 p.m., one lane closed from Laclede Station to Grant.
  • Route 370, St. Louis County, 8 p.m. to 10 p.m., the westbound Route 370 exit to Missouri Route 141 (Exit 9) closed.
  • Route AB, St. Louis County, 9 a.m. to 3 p.m., one lane closed at Bonhomme Creek. Flagging operation will be in place to help direct traffic.
  • I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed from I-70 to Route K.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound lane closed from Wentzville Parkway to Route A.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one lane closed westbound from Route Z to Route A.
  • Route 370, St. Charles County, 5 p.m. to 5 a.m., one eastbound lane closed from Elm Point to Missouri River.
  • Route 21, Jefferson County, 9 a.m. to 3 p.m., one lane closed over Route M. Flaggers will direct traffic through the work zone.
  • Route A, Jefferson County, 7 p.m. to 5 a.m., the bridge over I-55 will be closed in one direction (eastbound and westbound) at a time.
  • I-44, Franklin County, 1 a.m. to 3 a.m., the westbound exit 253 at Gray Summit closed.
  • Route 21, Franklin County, 3 a.m. to 5 a.m., the southbound exit to Hayden Road closed.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed between Independence Drive to Route BB.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed from Gasconade/Franklin County line to Route C.
  • Route 100, Franklin County, 7 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound/westbound lane closed from Route OO to I-44 Washington exit. Flaggers will direct traffic through the work zone.
  • Route KK, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route C and Route 185. Flaggers will direct traffic through the work zone.
  • Route MM, Franklin County, 6 a.m. to 4 p.m., one lane closed between Beauty Dr. and Purina Farms.

 

Wednesday, September 10

  • I-44, St. Louis City, 12 a.m. to 2 a.m., the westbound I-44 exit ramp to Jefferson Avenue (Exit 289) closed.
  • I-44, St. Louis City, 2 a.m. to 4 a.m., the westbound I-44 exit ramp to Grand Ave (Exit 288) closed.
  • I-44, St. Louis City, 4 a.m. to 6 a.m., the westbound I-44 exit ramp to Hampton (Exit 286) closed.
  • I-44, St. Louis City, 8 p.m. to 10 p.m., one westbound I-44 exit ramp to Arsenal (Exit 284B) closed.
  • I-44, St. Louis City, 10 p.m. to 12 a.m., one eastbound I-44 exit to Hampton (Exit 286) closed.
  • I-64, St. Louis City, 9 a.m. to 3 p.m., the ramp from Market Street to westbound I-64 closed.
  • I-64, St. Louis City, 6 a.m. to 2 p.m., one eastbound lane closed at 22nd through 6th
  • I-64, St. Louis City, 9 a.m. to 3 p.m., one westbound lane closed from Broadway to 22
  • I-170, St. Louis County, 8:30 p.m. to 5 a.m., one southbound lane closed from Scudder Road to Route 115 and one lane and ramp under the westbound I-70 overpass closed.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane between I-270 and Butler Hill Road.
  • Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lindbergh and Green Park.
  • Route 61/67, St. Louis County, 8 a.m. to 3:30 p.m., one southbound and northbound lane closed from the Conway/German Intersection to Conway Road.
  • Route 100, St. Louis County, 7 p.m. to 6 a.m., one eastbound and westbound lane closed between Route OO and Pond Road.
  • Route 100, St. Louis County, 9 a.m. to 3 p.m., one eastbound lane closed between Barrett Station Road and I-270.
  • Route 109, St. Louis County, 6 a.m. to 3 p.m., one northbound and southbound and eastbound and westbound lane closed at Route 109 & CC intersection.
  • Route 115, St. Louis County, 7 p.m. to 5 a.m., one lane closed eastbound and westbound from I-170 to Hanley.
  • Route 255, St. Louis County, 8 p.m. to 5 a.m., one westbound lane closed from Koch Rd. to I-55.
  • Route 267, St. Louis County, 5 a.m. to 2 p.m., one northbound lane closed from Mehlville Court to Buckley.
  • Route 340, St. Louis County, 8 p.m. to 6 a.m. and 9 a.m. to 3 p.m., one eastbound and westbound lane closed between Warson and I-170.
  • Route 366, St. Louis County, 6 a.m. to 3 p.m., one lane closed from Laclede Station to Grant.
  • I-64, St. Charles County, 8 p.m. to 5:30 a.m., one eastbound lane closed from I-70 to Route K.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one eastbound lane closed from Wentzville Parkway to Route A.
  • I-70, St. Charles County, 9 p.m. to 5:30 a.m., one lane closed westbound from Route Z to Route A.
  • Route 370, St. Charles County, 5 p.m. to 5 a.m., one eastbound lane closed from Elm Point to Missouri River.
  • Route Z, St. Charles County, 10 p.m. to 5 a.m., all lanes closed on Route Z under I-70.
  • Route 21, Jefferson County, 9 a.m. to 3 p.m., one lane closed over Route M. Flaggers will direct traffic through the work zone.
  • Route 61, Jefferson County, 9 a.m. to 3 p.m., one lane closed at U.S. Route 61 at Glaze Creek.
  • Route A, Jefferson County, 7 p.m. to 5 a.m., the bridge over I-55 will be closed in one direction (eastbound and westbound) at a time.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed between Independence Drive to Route BB.
  • Route 50, Franklin County, 6 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound and westbound lane closed from Gasconade/Franklin County line to Route C.
  • Route 100, Franklin County, 7 p.m. to 5 a.m. and 8 a.m. to 3 p.m., one eastbound/westbound lane closed from Route OO to I-44 Washington exit. Flaggers will direct traffic through the work zone.
  • Route KK, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route C and Route 185. Flaggers will direct traffic through the work zone.
  • Route MM, Franklin County, 6 a.m. to 4 p.m., one lane closed between Beauty Dr. and Purina Farms.

 

 

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