I-70 Exit 203 Interchange in Frisco - Design Phase

About the Project

Safety, mobility, and operational improvements on I-70 at the Colorado State Highway 9 (CO9) Frisco interchange (Exit 203) and the adjacent intersection on Lusher Court/Dillon Dam Road (DDR) are needed. The Interchange experiences congestion during peak travel times. This project
will improve the capacity of the interchange by improving the westbound ramp and I-70 bridge. It also improves the eastbound ramps and adjacent intersection that affect the operation of this interchange.

The project will improve:

  • Mobility: Interchange improvements enhance economic vitality and mobility by reducing travel delays caused by crashes and congestion for all users, including the freight industry and tourists. Mobility improvements help regional transit such as Bustang and Summit Stage, the local transit agency that uses I-70.
  • Safety: The interchange improvements will increase traveler safety for all users, including new bicycle and pedestrian connections across CO 9 and I-70.

Schedule & Important Dates

  • 2023 – Conceptual/Preliminary Design and Environmental Clearances & Approvals
  • 2024 – Final Design, Right-of-Way Acquisition, and Early Utility Relocations
  • 2025 – Advertisement in the fall
  • 2026 - Begin construction in the spring

Project Area

The project area is at Exit 203 on I-70 in Frisco.

I-70 Exit 203 Project Area Map

Project Status

In response to the I-70 Programmatic Environmental Impact Statement (PEIS), the Colorado Department of Transportation (CDOT) completed the Interstate 70 Exit 203 & Eastbound Auxiliary Lane Feasibility Study in 2020 that identified improvements at the interchange. Local stakeholders were involved in the feasibility study as part of the Project Leadership Team (PLT) and will continue to be involved in final design. CDOT is advancing these interchange concepts to finalize the project configuration including a new frontage road bypass under CO9 connecting Dillon Dam Road and Lusher Court which will relieve traffic congestion on CO9 near the Exit 203 interchange. The project will also add multi-use paths along the frontage road and across I-70 to existing hiking and biking destinations. Once the final configuration is set the project will advance to preliminary and final design. The project is identified as a priority project within the current CDOT 10-year plan.

  • Conceptual Design was completed in the spring and summer of 2023.
  • Preliminary Design will be completed between the summer of 2023 and winter of 2024.
  • Environmental Clearance will be completed between the fall of 2023 and early summer of 2024.
  • Right-of-Way Acquisition will begin Summer of 2024 and continue until the Summer of 2025.
  • Final Design will begin in the spring of 2024 and continue until the winter of 2025.
  • Prior to construction Utility Relocation will occur during the summer and fall of 2024.
  • Advertisement for the full project will take place in the fall of 2025.
  • Construction will begin the spring of 2026 and is anticipated to continue through the fall of 2028 with a winter shutdown between November and March in 2026 and 2027.
  • Project Leadership Team and Stakeholder Meetings will be held early summer of 2023, late fall 2023, spring of 2024, and fall of 2024.
  • Public Open House Meetings will be held in fall of 2023 and Winter of 2026.