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St. Charles CountyMajor Construction 2021-2022**

2021 Projects

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Route 94, Route 364, and Muegge Road-Construct a Diverging Diamond Interchange (DDI), adding additional ramp connections. Add a lane on Route 94 in each direction from Route 364 to I-70. Resurfacing. Construction begins Fall 2021 and ends Spring 2023.

Southbound Route 67 Elevation Project- Elevation of the southbound Route 67 lanes for one mile south of the Clark Bridge. Construction begins Summer 2021.

Route C from Mississippi River to Salt River Road -Pavement treatment (chip seal). Construction begins Summer 2021 and ends Fall 2021.

Route F from Route D to Route 94 - Pavement improvements and adding shoulders. Construction began Summer 2020 and ends Fall 2021.

Bridge Rehabilitation I-70/Route 370 Interchange -. Rehabilitate six bridges at I-70/Route 370 Interchange.Construction begins Summer 2021 and ends 2022.

Median Barrier on Route 364 over I-64-Seperate EB & WB Route 364 with median barrier at I-64 Interchange. Construction begins Summer 2021 and ends Fall 2021.

** 2021- 2022 Map continues onto second page. Map up-to-date as of February 2021

I-70 Eastbound Blanchette Missouri River Bridge-Epoxy overlay on the eastbound deck only. Eastbound off-peak lane closures will be in place. Construcion began Spring 2020 and completion date Fall 2021.

I-70 David Hoekel Parkway Interchange (City of Wentzville project)- Construct new interchange between Wentzville Parkway and Route T/Route W. Construction is ongoing and is expected to be completed by Spring 2022.

I-70 from Fairgrounds to Cave Springs- Interchange improvements. Work begins Fall 2021 and ends Fall 2023

I-70 from Lake St. Louis Blvd to Route K- Pavement improvements. Work begins Spring 2021 and ends Fall 2021.

I-70 Lake St. Louis Blvd Interchange- Construct roundabout at I-70 eastbound ramps at Lake St. Louis Blvd and Veterans Memorial Parkway. Work begins Spring 2021. Construction ends Summer 2022.

Route 364 at Heritage Crossing (St. Charles Co. Project)- Construct new slip ramps at Heritage Crossing. Work begins early 2021 and ends Fall 2021. .

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St. Charles CountyMajor Construction 2021-2022**

2022 Projects

Route N at Route Z Intersection Improvements (St. Charles Co. project)- Realign Route Z and add signal at Route N intersection. Work begins Fall 2021 and ends Summer 2022.

I-70 Wentzville Parkway Interchange Improvements Phase 1 (City of Wentzville Project)-Reconstruct I-70 EB ramps and add roundabout at Veteran’s Memorial Pkwy, west of Wentzville Parkway. Construction began Spring 2021 and is expected to be completed Early 2022..

I-70 from Warren Co. Line to Wentzville Pkwy. -Pavement improvements. Construction begins Spring 2022 and ends Fall 2022.

Route 94 from I-64 to Route 364 - Pavement improvements. Construction begins Spring 2022 and ends Fall 2022.

Route D from Route T to Route Z -.Pavement Improvements. Construction begins Spring 2022 and ends 2022.

Route 364 Bridge Rehabilitations -Thin overlay of bridges at Kisker Rd. and Harvester Rd. Construction begins Spring 2022 and ends Fall 2022.

Route 94 at Defiance Road-Drainage ImprovementsConstruction ends Summer 2021 ** Map up-to-date as of February 2021**

WB Route 364 from MO River to Heritage Crossing-Signing & striping improvements to create fourth lane. Construction begins Fall 2021. Completion date Fall 2022.

I-70/Route K Interchange – Phase 2 (City of O’Fallon Project)-Improvements to ramps on west side of inter-change. Outer road improvements between Woodlawn Ave. & Route K. Construction begins Summer 2021 and ends Fall 2022.

Route DD from I-64 to east of Castlewood Estates Dr. (City of O’Fallon Project)-Widen Route DD to four lanes, add signal at Caladonia Pkwy, add roundabout, interchange improvements at I-64.Construction begins Summer 2021 and ends in 2022.

Route A from Route 61 to I-70 (St. Charles Co. project)- Resurface, signal improvements and add lighting. Construction begins Spring 2021 and endsFall 2021.

Route N at Hopewell / Duello (St. Charles Co. project)-Realign Route N to soften curve and align cross streets.Construction is ongoing and is expected to be completed by Summer 2021.

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