Interstate Drive

Interstate Drive had become increasingly hazardous due to its deteriorating condition and growing traffic demands. Oates Associates partnered with St. Charles County to transform this corridor from Prospect/Duello Road to Quail Ridge Park. The project delivered a modern, safe, and efficient roadway, completing the eastern segment of the corridor and creating an east-west route that extends from near I-64 to the new interchange of David Hoekel Parkway and I-70.

The improvements provide a safer and smoother travel experience with reconstructed pavement and refined horizontal and vertical curves. Turn lanes were added at side streets and major entrances and a new roundabout is at Interstate Drive and Prospect/Duello Road to improve traffic flow. Sidewalks now connect neighborhoods to Quail Ridge Park, enhancing community accessibility. Paved shoulders, roadside ditches, and culverts were incorporated to strengthen drainage and roadway resilience.

Our team delivered full design services encompassing roadway and drainage design, PS&E plans, traffic staging, erosion control, and right-of-way plans, while also assisting the County with utility coordination and providing construction consultation. Oates also evaluated intersection types, including a roundabout, to address the anticipated traffic demands at Interstate Drive and Prospect/Duello Road.  We also completed the control survey, topographic survey, record research, existing monumentation search and field location, and established the existing boundary and right of way lines for the project. Right of way acquisition documents consisting of parcel exhibits and legal descriptions were prepared. Additionally, Oates captured an orthomosaic aerial image of the project with a drone to assist with design.

The result is a safer, more efficient corridor that meets current design standards and supports future growth in St. Charles County.