Frequently, counties and municipalities have work that impacts MoDOT roadways. These projects can range from ones where the project sponsor has gotten funding from the Federal Government, or where MoDOT has entered into an agreement with the sponsor to share costs on a needed project. In these projects, the sponsor is required to design, bid and construct the project; however, MoDOT retains a good amount of oversight to ensure that work is completed to appropriate standards.
Occasionally, counties have large projects that developers or other agencies are working on that impact MoDOT highways or property. Although MoDOT isn't directly working on those projects, it does issue permits to complete those projects and is very involved in overseeing the projects to ensure work is completed to the appropriate standards.