During peak traffic times, the project's goal is to keep four lanes open across the Ladue Bridge and three through lanes and two ramp lanes open near I-64. Crews will also close one northbound lane just after the I-64 exit, with one southbound lane closed around the clock starting in early summer. Most of this work will start off the roadway, but drivers can anticipate narrowed lanes on both northbound and southbound I-270 between Conway and Ladue. In March 2024, MoDOT will start work near Conway. In February 2024, crews will start work near the Ladue bridge, with lane closures on Ladue in both directions. This will be a two-year construction project that will have narrowed lanes and ramps. What construction impacts can drivers expect? Drivers from I-64 to northbound I-270 will have two lanes to get up to interstate speeds and merge over beyond Ladue, and southbound drivers heading to I-64 will have more space to exit eastbound and westbound The two bridges over Ladue Road and Conway Road will be wider and the ramps reconfigured to take advantage of that. What changes can drivers expect as a part of the project? To get more specific information on which lanes will be closed and where traffic will be shifting, please sign up for the e-mail updates below. During the work on Ladue, the ramp from northbound I-270 to Ladue will close for about two months, but the timing on that has not been determined. The two bridges are far enough apart that traffic will be able to make the necessary shifts during the construction. Work at Ladue will be somewhat similar, but timing may not allow the traffic shifts on Ladue and Conway to happen at the same time. As the bridge work completes, the lane closures will move to the middle of the interstate and then to the right lanes on northbound I-270. Work on Conway will start on the outside lanes, and then will start on the right lanes on southbound I-270. Both the Conway and Ladue bridge projects will require one lane closed on both northbound and southbound I-270, and the remaining four lanes in each direction will need to be narrowed and shifted. Conway under the interstate will be narrowed and lowered.Īll work is going to require narrowed lanes and ramps, as well as shifted lanes. In addition, the signal at North Outer 40 and Conway will be replaced with a single lane roundabout. To accommodate the wider interstate, the ramps between Interstates 270 and Interstate 64 will be reconfigured. During the replacement, the bridge over Conway and the bridge over Ladue Road will be widened for both the northbound and southbound interstates. The Interstate 270 bridge over Conway Road has reached the end of its useful life and needs to be replaced.

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