Districts Impacted
Project Milestones
Design experts evaluate the corridor and complete a proposed design for the project.
During the public meetings, the department shares those preliminary plans with the public to show the current intent of the project. The public provides input on those plans -- including their preferences, and issues that they would like to see potentially addressed, if it fits within the scope and the allotted amount for the project.
Once the department gets input from the community, it makes what adjustments it can and starts obtaining the necessary property (including temporary or permanent easements) to construct the project. This goes through the department's Right of Way experts.
Once all necessary work prior to construction is complete, the project is put out for bids and awarded by the Missouri Highways and Transportation Commission.
Construction begins on the project.
When all the work is complete, and crews have accepted the corridor for MoDOT maintenance, the project is done.
What is the current situation?
The Missouri Department of Transportation has a project, starting in late 2024, scheduled for Missouri Route AB (Ladue Road) between I-270 and Route 141. As part of MoDOT’s project, the department will be resurfacing the roadway as well as making updates to the roadway’s pedestrian facilities. All existing sidewalks and crosswalks on MoDOT right of way need to be updated to be meet current Americans with Disabilities Act requirements. There are some sections of sidewalk that are being connected, as well. In addition, many of the signals along the corridor will be updated.
What improvements are being made?
The department is updating sidewalks along the corridor to meet Americans with Disabilities act requirements. Several sidewalks have been constructed off MoDOT right of way – the department will tie into those sidewalks where possible, but they remain the responsibility of the property owner to maintain and update as needed. In addition, the department is updating many of the pedestrian signals along the corridor to make them compliant with Americans with Disabilities Act requirements. The department is updating the signals at Emerson Road and the signals at the ramps between I-270 and Ladue.
Project displays
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is the overview map. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from the Chesterfield City Limits to east of Route 141. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from east of Route 141 to west of Babler Road. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from west of Babler Road to east of Bryn Wyck Place. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from east of Bryn Wyck Place to east of Laduemont Drive. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from east of Laduemont Drive to east of Royal Gate Drive. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from east of Royal Gate Drive to west of Belle Maison Drive. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from west of Belle Maison Drive to east of Coeur De Ville Drive. For a larger view, please click here.
Conceptual displays of an upcoming project along Route AB (Ladue Road) between 141 and I-270. This is from east of Coeur De Ville Drive to east of Emerson Road. For a larger view, please click here.
Are bike facilities included in this project?
The roadway will remain signed as a share the road facility for cyclists and drivers.
What are the impacts from the project?
For the most part, impacts during the construction should be relatively minimal. Sections of sidewalks will be closed for periods as crews work on the updates. Drivers can also expect one lane closed in either direction during non-peak traffic hours while signals and sidewalks are updated. Flaggers will help direct traffic through that work zone while it is active. Business owners with multiple driveways will have at least one access point into their business at all times through construction. Crews will work on half of the access point at a time when there is only one entrance/exit from a business. Residential driveways are too small to complete half at a time – driveways may need to be closed for several days when they are being worked on. We anticipate that the contractor will be able to share a general timeframe when they anticipate being in the area -- probably about a week or two in advance. Work is scheduled to be completed before the PGA tournament scheduled for Bellerive Country Club in 2026.
What is the timeline?
| Event | Time |
| Conceptual design | Spring 2023 |
| Public Meeting | Spring 2023 |
| Right of Way process starts | Summer 2023 |
| Project awarded | Fall 2024 |
| Construction begins | Early 2025 |
| Construction complete | Spring 2026 |
Project documents
- Route AB Fact Sheet
- Route AB Project overview
- Route AB Board 1: Chesterfield city limits to east of Route 141
- Route AB Board 2: East of Route 141 to West of Babler Road
- Route AB Board 3: West of Babler Road to East of Byrn Wyck Place
- Route AB Board 4: East of Byrn Wyck Place to East of Laduemont Drive
- Route AB Board 5: East of Laduemont Drive to East of Royal Gate Drive
- Route AB Board 6: East of Royal Gate Drive to West of Belle Maison Drive
- Route AB Board 7:West of Belle Maison Drive to East of Coeur De Ville Drive
- Route AB Board 8: East of Coeur De Ville Drive to East of Emerson Road