Muegge Road Interchange at Route 94 & Route 364


  • Local Governments
  • State Agencies


  • Engineering
  • Innovative Geometry
  • Roadways + Interchanges
  • Traffic + Safety
  • Transportation


  • St. Charles County, Missouri

The purpose of this project is to improve the capacity, safety, and mobility at the interchange of Route 94, Route 364, and Muegge Road in St. Charles County. When complete, the project will create a free flow traffic movement along Route 94 from Route 364. Currently, the interchange lacks access for the following movements:

  • East and westbound Route 94 to northbound Muegge Road
  • Southbound Muegge Road to east and westbound Route 94

The project will construct a Diverging Diamond Interchange (DDI) at the current interchange location with a signalized condition at the north end of the existing bridge over Route 94. To accommodate future travel volumes anticipated, the bridge over Route 94 will be widening to the east to accommodate another southbound lane. Furthermore, the at grade signal at Portwest Drive will be eliminated, an additional lane eastbound between the interchange and Zumbehl Road will be added, and an additional westbound lane from Pralle Lane to Portwest Drive will be added to accommodate the new traffic movements in terms of both safety and capacity. The resulting interchange will provide direct access for all movements and reduce adverse travel for stakeholders traveling to and from Muegge Road, without degrading the existing MoDOT or adjacent transportation system.

The Route 94 / Route 364 / Muegge Road Interchange is a joint effort between the MoDOT, St. Charles County, and the City of Saint Charles, with each of the entities providing funding towards the ultimate goal. Cost Share funding, STP funding, Road Board funding, and local funding are all being used to make this project a reality. Furthermore, MoDOT is the project sponsor and has implemented an innovative development strategy around the HR Green Team, making them the Project Management Consultant (PMC) for the project. This means HR Green serves as the internal Project Manager just as a MoDOT PM sitting at the District office would, interfacing with the Central office, other District staff and disciplines, hosting Core Team meetings, and performing other administrative duties on behalf of the District to complete the design. Additionally, the Team will serve as the project’s Resident Engineer and administer the construction contract.

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