Counties Impacted
St. Louis
Project Status
In Progress

Southwest St. Louis County area construction 2019

I-44 bridge replacement – This project removes and replaces the driving surface from Murdoch to the River Des Peres and replaces the eastbound bridge over the BNSF Railroad. During construction the ramp from Shrewsbury to eastbound I-44 is closed. Drivers have shifted lanes – three eastbound and two westbound – during the project. The project is suspended for redesign, but is currently anticipated to be complete by the end of 2019.

I-44 – Bridge replacement.  This project replaces the eastbound and westbound I-44 bridges just west of I-270 over the Meramec. Replaces the bridges on the ramps between I-44 and eastbound and westbound Watson Road.  Work has begun on the project, which continues through 2021. 

I-44 – Bridge repair. This project repairs the Maritz Road Bridge over I-44.  Maritz will be closed for 30 days during the work, and one lane will be closed on westbound I-44 The project should be complete in summer 2019.

I-44 business loop – Pavement improvements. Resurfaces the I-44 business loop from Neosho to just east of Allenton.

I-64 – Pavement improvements. This project resurfaces the interstate between Ballas and just west of Spoede.  Work will start in spring 2019 and be complete later in the year.

Route 109 – Bridge rehabilitation.  This project starts in spring 2019.  Crews will remove and replace the deck of the bridge, widen the bridge over Route 100 to four lanes, and construct a two-lane roundabout at the ramps and at Route 109 and Main Street.  Crews will also construct an underpass to take the Wildwood shared use path under Route 109. Major impacts to traffic will be complete in winter 2019, but work will continue through spring 2020.

 Route 141 – Pavement improvements. Resurfaces route 141 between Route 30 and I-64.  Also makes repairs to the bridges over the BNSF railroad and  the Meramec River, and at  Grand Glaize Creek, Route 100 (Manchester) and Woods Mill

Route 340 – Signal replacements. This project replaces the signals at the I-64 ramps, Ballas, Craig and Mosley.

Route 340 – Improvements from Chesterfield Parkway East /West to south of I-64. Extend the southbound auxiliary lane between the I-64 eastbound and westbound ramps. Extend the northbound left turn lane to westbound I-64 further to the south. Adds turn lanes at Chesterfield Parkway East and West and replaces the signals at those intersections. Adds a right turn lane on the westbound I-64 ramp to Route 340. Will be complete in mid-2019.