Weekly construction report

St. Louis Work Zones March 5-11

ST. LOUIS – Drivers who regularly use Route 370 between St. Louis and St. Charles County should be aware of several lane shifts near the Route 370 bridge over the Missouri River (the Discovery Bridge) continuing this week. All work is weather permitting. 

For the remainder of the week, drivers can expect:

• Thursday, March 5 and Friday, March 6, crews will work nightly from 7 p.m. to 5:30 a.m. to complete the median barrier and move the westbound lanes to the eastbound lanes of the bridge. 
• Friday, March 6 from 10 p.m. to 5:30 a.m., crews will close both ramps at Route 141 to westbound Route 370 and the exit ramp from westbound Route 370 to Route 141. 
• Once the traffic switch is complete, drivers can expect two lanes of traffic, in each direction, across the bridge around the clock.

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 67, St. Louis County, one northbound lane closed from Patterson to St. Ferdinand. 
• 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 370, starting at 7 p.m. Friday, one lane closed eastbound and westbound across the Missouri River (Discover Bridge) until late 2027.
• 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 at 7 a.m. February 24, 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.

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

Thursday, March 5

• I-44, St. Louis City, 3 a.m. to 2 p.m., two lanes closed westbound from Jamieson to Shrewsbury.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Gravois.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Reavis Barracks. 
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lutheran South to Suson Hills.
• Route 30, St. Louis County, 7 p.m. to 4 a.m., one lane closed eastbound in various locations along the corridor.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Topping Road and Pointe Drive.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Rd. and Knollhaven Rd.
• 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 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• 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, 9 p.m. to 5:30 a.m., all lanes closed eastbound just east of the I-70/I-64/U.S. Route 61 interchange. Detours will be marked.
• 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 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.

Friday, March 6

• I-44, St. Louis City, 3 a.m. to 2 p.m., two lanes closed westbound from Jamieson to Shrewsbury.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Gravois.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Reavis Barracks. 
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lutheran South to Suson Hills.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Topping Road and Pointe Drive.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Rd. and Knollhaven Rd.
• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from southbound to westbound Route 370 will be closed.
• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from northbound to westbound Route 370 will be closed.
• 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 370, St. Louis County, 10 p.m. to 4 a.m., the ramp from westbound to Route 141 will be closed.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• 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 94, St. Charles County, 10 p.m. to 4 a.m., the ramp to eastbound 370 will be closed.
• Route 94, St. Charles County, 7 p.m. to 5:30 a.m., up to two left turn lanes closed from southbound to eastbound Route 370.
• Route 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.
• Route 370, St. Charles County, 7 p.m. though late 2027, one lane closed eastbound and westbound across the Missouri River (Discovery Bridge).

Saturday, March 7

• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from southbound to westbound Route 370 will be closed.
• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from northbound to westbound Route 370 will be closed.
• Route 370, St. Louis County, 10 p.m. to 4 a.m., the ramp from westbound to Route 141 will be closed.
• Route 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• Route 94, St. Charles County, 10 p.m. to 4 a.m., the ramp to eastbound 370 will be closed.
• Route 94, St. Charles County, 7 p.m. to 5:30 a.m., up to two left turn lanes closed from southbound to eastbound Route 370.
• Route 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.

Sunday, March 8

• Route 94, St. Charles County, 10 p.m. to 4 a.m., the ramp to eastbound 370 will be closed.
• Route 94, St. Charles County, 7 p.m. to 5:30 a.m., up to two left turn lanes closed from southbound to eastbound Route 370.
• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from southbound to westbound Route 370 will be closed.
• Route 141, St. Louis County, 10 p.m. to 4 a.m., the ramp from northbound to westbound Route 370 will be closed.
• Route 370, St. Louis County, 10 p.m. to 4 a.m., the ramp from westbound to Route 141 will be closed.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.

Monday, March 9

• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Gravois.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Reavis Barracks. 
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lutheran South to Suson Hills.
• Route 30, St. Louis County, 7 p.m. to 4 a.m., one lane closed eastbound in various locations along the corridor.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Topping Road and Pointe Drive.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Rd. and Knollhaven Rd.
• 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 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• 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 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.

Tuesday, March 10

• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Gravois.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Reavis Barracks. 
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lutheran South to Suson Hills.
• Route 30, St. Louis County, 7 p.m. to 4 a.m., one lane closed eastbound in various locations along the corridor.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Topping Road and Pointe Drive.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Rd. and Knollhaven Rd.
• 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 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• 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 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.

Wednesday, March 11

• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Gravois.
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed from Green Park to Reavis Barracks. 
• Route 21, St. Louis County, 6 a.m. to 2 p.m., one northbound and southbound lane closed between Lutheran South to Suson Hills.
• Route 30, St. Louis County, 7 p.m. to 4 a.m., one lane closed eastbound in various locations along the corridor.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Topping Road and Pointe Drive.
• Route 100, St. Louis County, 7 a.m. to 3 p.m., one westbound lane closed between Weidman Rd. and Knollhaven Rd.
• 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 370, St. Louis County, 7 p.m. to 5:30 a.m., one lane closed westbound from I-270 to the Missouri River.
• 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 370, St. Charles County, 7 a.m. to 2:30 p.m., one lane closed westbound from Route 141 to Route 94.
• Route 370, St. Charles County, 8 a.m. to 6 p.m.., one eastbound lane closed between Mel Wetter Parkway to Route 141.
• Route 370, St. Charles County, 7 p.m. to 5:30 a.m., two eastbound and westbound lanes closed from Route 141 to Route 370 overpass of Route 94.
• Route Z, St. Charles County, 10 p.m.to 5 a.m., all lanes closed between the eastbound and westbound I-70 ramps.

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