St. Louis Work Zones May 14-20

ST. LOUIS - Drivers who use northbound Interstate 270 between I-64 and Route 340 (Olive Boulevard) should be aware that crews will close and shift several lanes overnight Thursday, May 14 and Friday, May 15.

Weather permitting, crews will close up to three additional northbound lanes on I-270 near Ladue (mile marker 13). Two lanes close at 8 p.m., with the third lane closing by 10 p.m. At least one northbound lane will always remain open. Closed lanes reopen at 5 a.m. the following morning. During the work, northbound lanes will be shifted to the left with barrier wall separating two of the four through lanes. The northbound exit to Ladue Road will be unaffected.

The work is part of the on-going project to replace the I-270 bridge over Conway Road and to widen the I-270 bridge over Ladue Road.

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 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.
• I-55, St. Louis City, one southbound lane closed from Gasconade to Weber.
• I-55, St. Louis City, the ramp from Germania to northbound is closed.
• I-55, St. Louis City, the Gasconade on ramp to northbound I-55 will be closed until June.
• I-55, St. Louis City, one northbound lane will be closed from 4500 Broadway to Potomac through June.
• 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 100, St. Louis County, one eastbound and westbound lane closed from Mason Lane to Barrett Station Road through late 2026.
• Route 366, St. Louis County, starting Monday, May 11, one lane closed eastbound and westbound between Grant and Watson Industrial Park through mid-October.
• Route N, St. Louis County, one lane closed southbound from south of I-70 to Augusta Avenue.
• 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 Avenue.
• I-64, St. Charles County, North Outer Road/Technology Drive bridge closed through spring 2026.
• I-70, St. Louis County, one eastbound north outer road lane closed west of Route W.
• I-70, St. Charles County, westbound on ramp closed at Foristell.
• Route 94, St. Charles County, one left-turn lane for on ramp to eastbound 370 closed through late 2027.
• Route 370, St. Charles County, two westbound lanes moved to the eastbound Discovery Bridge across the Missouri River until late 2027. Two eastbound lanes shifted to the right. Temporary barrier to divide eastbound and westbound lanes.
• I-55, Jefferson County, up to three lanes closed northbound and southbound between Route 141 and Meramec Bottom.
• 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, starting Monday, May 11, all lanes closed on Herky Horine under the interstate until June.
• Route 67, Jefferson County, one 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.

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

Thursday, May 14

• Route 100, St. Louis City, 5 a.m. to 7 p.m., one lane closed westbound between Kingshighway and Yale.
• I-44, St. Louis County, 9 a.m. to 2:30 p.m., one westbound lane closed at Berry Road.
• I-64, St. Louis County, 7 a.m. to 3 p.m., rolling westbound lane closure from I-170 to the Missouri River.
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to three northbound lanes closed and shifted between I-64 and Route 340 (Olive Boulevard).
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to two lanes closed northbound and southbound between I-64 and Dougherty Ferry.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Green Park and Gravois.
• Route 30, St. Louis County, 6 p.m. to 5 a.m., one eastbound and westbound lane closed from the River Des Peres to 141.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed and shifted between Mason Lane and Barrett Station Road.
• Route 100, St. Louis County, 8:30 a.m. to 2 p.m., one eastbound lane closed from Route 141 and Highland Boulevard.
• Route 231, St. Louis County, 8 a.m. to 3 p.m., one northbound lane closed between Christopher Drive and Pioneer Drive.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between I-270 and North Office Parkway.
• Route 364, St. Louis County, 9 a.m. to 2:30 p.m., one right lane closed westbound just east of the Missouri River.
• Route 370, St. Louis County, 8 a.m. to 3:30 p.m., one eastbound lane closed between Cowmire Circle and Missouri Bottom Road.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., up to two westbound lanes closed between I-270 and the Mills Mall exit ramps.
• Route N, St. Louis County, 6 a.m. to 3:30 p.m., various lanes closed between Brotherton and Cool Valley; and Route 115 to south of University Place.
• I-64, St. Charles County, 7 a.m. to 3 p.m., rolling westbound lane closure from the Missouri River to I-70.
• 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-55, Jefferson County. 8 p.m. to 5 a.m., one lane closed in each direction on McNutt at I-55.
• I-55, Jefferson County, 8 p.m. to 6 a.m., one southbound right lane closed from Maley Quarry to Route A.
• Route A, Jefferson County, 8 p.m. to 5 a.m., one lane closed in each direction between Collins Drive and Route 61/67.
• Route V, Jefferson County, 8 a.m. to 3:30 p.m., one lane closed over Joachim Creek. A temporary signal will help direct traffic through the work zone.
• I-44, Franklin County, 8 p.m. to 7 a.m., all westbound I-44 lanes closed at the Route D bridge. The Route D bridge will also be closed. Westbound I-44 traffic will be diverted up and over the exit ramps at I-44 and Route D.
• I-44, Franklin County, 8 p.m. to 6 a.m., two westbound lanes closed from Route 100 to Route 50.
• Route B, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and Lower Bottom Road South. Flaggers and a pilot car will direct traffic through the work zone.
• Route T, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and the St. Louis County line. Flaggers and a pilot car will direct traffic through the work zone.
• Route PP, Franklin County, 8 a.m. to 3 p.m., all lanes closed between Route 30 and Pickles Ford Rd. Detours will be signed.

Friday, May 15

• Route 100, St. Louis City, 5 a.m. to 7 p.m., one lane closed westbound between Kingshighway and Yale.
• I-64, St. Louis County, 7 a.m. to 3 p.m., rolling westbound lane closure from I-170 to the Missouri River.
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to three northbound lanes closed and shifted between I-64 and Route 340 (Olive Boulevard).
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to two lanes closed northbound and southbound between I-64 and Dougherty Ferry.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Green Park and Gravois.
• Route 30, St. Louis County, 6 p.m. to 5 a.m., one eastbound and westbound lane closed from the River Des Peres to 141.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed and shifted between Mason Lane and Barrett Station Road.
• Route 100, St. Louis County, 8:30 a.m. to 2 p.m., one eastbound lane closed from Route 141 and Highland Boulevard.
• Route 231, St. Louis County, 8 a.m. to 3 p.m., one northbound lane closed between Christopher Drive and Pioneer Drive.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between I-270 and North Office Parkway.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., up to two westbound lanes closed between I-270 and the Mills Mall exit ramps.
• Route N, St. Louis County, 6 a.m. to 3:30 p.m., various lanes closed between Brotherton and Cool Valley; and Route 115 to south of University Place.
• I-64, St. Charles County, 7 a.m. to 3 p.m., rolling westbound lane closure from the Missouri River to I-70.
• 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.
• Route 94, St. Charles County, 7 a.m. to 5 p.m., one lane closed to Route TT in Warren County. Flaggers and a pilot car will direct traffic through the work zone.
• I-55, Jefferson County. 8 p.m. to 5 a.m., one lane closed in each direction on McNutt at I-55.
• I-55, Jefferson County, 8 p.m. to 6 a.m., one southbound right lane closed from Maley Quarry to Route A.
• Route A, Jefferson County, 8 p.m. to 5 a.m., one lane closed in each direction between Collins Drive and Route 61/67.
• I-44, Franklin County, 8 p.m. to 7 a.m., all westbound I-44 lanes closed at the Route D bridge. The Route D bridge will also be closed. Westbound I-44 traffic will be diverted up and over the exit ramps at I-44 and Route D.
• I-44, Franklin County, 8 p.m. to 6 a.m., two eastbound lanes closed from Route 50 to Route 100.
• Route B, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and Lower Bottom Road South. Flaggers and a pilot car will direct traffic through the work zone.
• Route T, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and the St. Louis County line. Flaggers and a pilot car will direct traffic through the work zone.
• Route PP, Franklin County, 7 a.m. to 4 p.m., one lane closed in various locations.

Saturday, May 16

• I-64, St. Louis County, 7 a.m. to 3 p.m., rolling westbound lane closure from I-170 to the Missouri River.
• I-70, St. Louis County, 6 a.m. to 3 p.m., the Jennings Station Road on ramp to eastbound I-70 closed.
• I-64, St. Charles County, 7 a.m. to 3 p.m., rolling westbound lane closure from the Missouri River to I-70.
• Route 94, St. Charles County, 7 a.m. to 5 p.m., one lane closed to Route TT in Warren County. Flaggers and a pilot car will direct traffic through the work zone.
• I-44, Franklin County, 8 p.m. to 7 a.m., all westbound I-44 lanes closed at the Route D bridge. The Route D bridge will also be closed. Westbound I-44 traffic will be diverted up and over the exit ramps at I-44 and Route D.

Sunday, May 17

• I-44, Franklin County, 8 p.m. to 7 a.m., all westbound I-44 lanes closed at the Route D bridge. The Route D bridge will also be closed. Westbound I-44 traffic will be diverted up and over the exit ramps at I-44 and Route D.

Monday, May 18

• Route 100, St. Louis City, 5 a.m. to 7 p.m., one lane closed westbound between Kingshighway and Yale.
• I-64, St. Louis County, 7 a.m. to 3 p.m., rolling westbound lane closure from I-170 to the Missouri River.
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to two lanes closed northbound and southbound between I-64 and Dougherty Ferry.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Green Park and Gravois.
• Route 30, St. Louis County, 6 p.m. to 5 a.m., one eastbound and westbound lane closed from the River Des Peres to 141.
• Route 61/67, St. Louis County, 7 p.m. to 6 a.m., one lane closed northbound and southbound on the Mattesse Creek and Meramec River bridges.
• Route 100, St. Louis County, 7 p.m. to 5 a.m., one westbound lane closed between I-270 and Des Peres Road.

• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed and shifted between Mason Lane and Barrett Station Road.
• Route 100, St. Louis County, 8:30 a.m. to 2 p.m., one eastbound lane closed from Route 141 and Highland Boulevard.
• Route 231, St. Louis County, 8 a.m. to 3 p.m., one northbound lane closed between Christopher Drive and Pioneer Drive.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between I-270 and North Office Parkway.
• Route 370, St. Louis County, 8 a.m. to 3:30 p.m., one westbound lane closed between Cowmire Circle and Missouri Bottom Road.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., up to two westbound lanes closed between I-270 and the Mills Mall exit ramps.
• Route N, St. Louis County, 6 a.m. to 3:30 p.m., various lanes closed between Brotherton and Cool Valley; and Route 115 to south of University Place.
• I-64, St. Charles County, 7 a.m. to 3 p.m., rolling westbound lane closure from the Missouri River to I-70.
• 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, 9 a.m. to 2 p.m., all lanes at Route Z will be closed for up to 15 minutes for rock excavation.
• Route 94, St. Charles County, 7 a.m. to 5 p.m., one lane closed to Route TT in Warren County. Flaggers and a pilot car will direct traffic through the work zone.
• Route 370, St. Charles County, 8 a.m. to 3:30 p.m., two lanes closed eastbound over Cole Creek, Elm and Elm Industrial.
• Route Z, St. Charles County, 9 a.m. to 2 p.m., all lanes at I-70 will be closed for up to 15 minutes for rock excavation.
• I-55, Jefferson County, 8 p.m. to 6 a.m., one southbound right lane closed from Maley Quarry to Route A.
• Route V, Jefferson County, 8 a.m. to 3:30 p.m., one lane closed over Joachim Creek. A temporary signal will help direct traffic through the work zone.
• I-44, Franklin County, 8 p.m. to 6 a.m., two eastbound lanes closed from Route 50 to Route 100.
• Route T, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and the St. Louis County line. Flaggers and a pilot car will direct traffic through the work zone.
• Route PP, Franklin County, 8 a.m. to 3 p.m., all lanes closed between Route 30 and Pickles Ford Rd. Detours will be signed.

Tuesday, May 19

• Route 100, St. Louis City, 5 a.m. to 7 p.m., one lane closed westbound between Kingshighway and Yale.
• I-44, St. Louis County, 9 a.m. to 2:30 p.m., one eastbound lane closed at Big Bend Boulevard.
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to two lanes closed northbound and southbound between I-64 and Dougherty Ferry.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Green Park and Gravois.
• Route 30, St. Louis County, 6 p.m. to 5 a.m., one eastbound and westbound lane closed from the River Des Peres to 141.
• Route 61/67, St. Louis County, 7 p.m. to 6 a.m., one lane closed northbound and southbound on the Mattesse Creek and Meramec River bridges.
• Route 100, St. Louis County, 7 p.m. to 5 a.m., one westbound lane closed between I-270 and Des Peres Road.

• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed and shifted between Mason Lane and Barrett Station Road.
• Route 100, St. Louis County, 8:30 a.m. to 2 p.m., one eastbound lane closed from Route 141 and Highland Boulevard.
• Route 231, St. Louis County, 8 a.m. to 3 p.m., one northbound lane closed between Christopher Drive and Pioneer Drive.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between I-270 and North Office Parkway.
• Route 364, St. Louis County, 9 a.m. to 2:30 p.m., one lane closed eastbound west of Route 141.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., up to two westbound lanes closed between I-270 and the Mills Mall exit ramps.
• Route N, St. Louis County, 6 a.m. to 3:30 p.m., various lanes closed between Brotherton and Cool Valley; and Route 115 to south of University Place.
• 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, 8:30 a.m. to 4 p.m., westbound entrance and exit ramps closed temporarily from Convention Center to the Warren County line for a special event.
• 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, 9 a.m. to 2 p.m., all lanes at Route Z will be closed for up to 15 minutes for rock excavation.
• Route 370, St. Charles County, 8 a.m. to 3:30 p.m., one westbound lane closed at Elm Point, Elm, and Cole Circle.
• Route Z, St. Charles County, 9 a.m. to 2 p.m., all lanes at I-70 will be closed for up to 15 minutes for rock excavation.
• I-55, Jefferson County, 8 p.m. to 6 a.m., one southbound right lane closed from Maley Quarry to Route A.
• I-44, Franklin County, 8 p.m. to 6 a.m., two eastbound lanes closed from Route 50 to Route 100.
• Route T, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and the St. Louis County line. Flaggers and a pilot car will direct traffic through the work zone.
• Route PP, Franklin County, 8 a.m. to 3 p.m., all lanes closed between Route 30 and Pickles Ford Rd. Detours will be signed.

Wednesday, May 20

• Route 100, St. Louis City, 5 a.m. to 7 p.m., one lane closed westbound between Kingshighway and Yale.
• I-270, St. Louis County, 8 p.m. to 5 a.m., up to two lanes closed northbound and southbound between I-64 and Dougherty Ferry.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Green Park and Gravois.
• Route 30, St. Louis County, 6 p.m. to 5 a.m., one eastbound and westbound lane closed from the River Des Peres to 141.
• Route 61/67, St. Louis County, 7 p.m. to 6 a.m., one lane closed northbound and southbound on the Mattesse Creek and Meramec River bridges.
• Route 100, St. Louis County, 7 p.m. to 5 a.m., one westbound lane closed between I-270 and Des Peres Road.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed and shifted between Mason Lane and Barrett Station Road.
• Route 100, St. Louis County, 8:30 a.m. to 2 p.m., one eastbound lane closed from Route 141 and Highland Boulevard.

• Route 231, St. Louis County, 8 a.m. to 3 p.m., one northbound lane closed between Christopher Drive and Pioneer Drive.
• Route 340, St. Louis County, 9 a.m. to 3 p.m., one eastbound and westbound lane closed between I-270 and North Office Parkway.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., up to two westbound lanes closed between I-270 and the Mills Mall exit ramps.
• Route N, St. Louis County, 6 a.m. to 3:30 p.m., various lanes closed between Brotherton and Cool Valley; and Route 115 to south of University Place.
• 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, 9 a.m. to 2 p.m., all lanes at Route Z will be closed for up to 15 minutes for rock excavation.
• Route 370, St. Charles County, 8 a.m. to 3:30 p.m., one eastbound lane closed at Elm Point, Elm, and Cole Circle.
• Route Z, St. Charles County, 9 a.m. to 2 p.m., all lanes at I-70 will be closed for up to 15 minutes for rock excavation.
• I-55, Jefferson County, 8 p.m. to 6 a.m., one southbound right lane closed from Maley Quarry to Route A.
• I-44, Franklin County, 8 p.m. to 6 a.m., two eastbound lanes closed from Route 50 to Route 100.
• Route T, Franklin County, 7 a.m. to 5 p.m., one lane closed between Route 100 and the St. Louis County line. Flaggers and a pilot car will direct traffic through the work zone.
• Route PP, Franklin County, 8 a.m. to 3 p.m., all lanes closed between Route 30 and Pickles Ford Rd. Detours will be signed.

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