In observance of the Juneteenth federal holiday, all Douglas County Government offices will be closed on Thursday, June 19. Offices will reopen on Friday, June 20, for normal business. Ballot drop boxes and VSPC Services (opening Monday, June 16) will still be available. Many County services are available 24/7 by visiting online services.
Under Construction
Click here to receive updates on this project by email
Updated June 16, 2025
The US 85 project continues finishing operations along US 85 and below the bridge overC-470. To remove temporary barrier in the median of C-470 under the new bridge, the C-470 Express Lane will be closed over the next two weekends.
Other finishing operations for the overall project include permanently striping the roadway, completing pedestrian trail connections, installing new signage, landscaping installation and signal/lighting activation.
Watch a video to see how CFIs work
See the “Schedule” section below for more detailed information on traffic impacts. For background information prior to construction, visit US85DouglasCounty.com
This project will improve safety, mobility, and traffic operations by widening (from four to six lanes) and reconstructing a segment of US 85 (South Santa Fe Drive) from Highlands Ranch Parkway, extending north of the C-470 Interchange to Dad Clark Gulch (which is located approximately 1,200 feet north of County Line Road). Major US 85 intersection improvements will occur at Highlands Ranch Parkway, Town Center Drive, Blakeland Drive, the C-470 Interchange ramps and at County Line Road. The project also includes the replacement and widening of the existing bridge that carries US 85 over C-470.
Multimodal improvements include bus stop enhancements, a new shared-use path for bicyclists and pedestrians on the east side of US 85, a below-grade crossing for the C-470 Trail at US 85, a below-grade crossing for the High Line Canal Trail at US 85, and a new pedestrian link from the Wolhurst community to the C-470 Trail.
The project also includes the addition of continuous auxiliary lanes, new asphalt paving, relocation of utilities, raised medians, new curb and gutter, and a new closed storm sewer system with water quality ponds.
Timeline: Fall 2022 to Fall 2025
Partial Continuous Flow Intersection (CFI) will be installed for the following traffic movements:
View a map of US 85 Interchange at the above 3 listed intersections.
Other projects along US 85 in Douglas County
June 15 – June 21:
Major Impacts:
Minor Impacts:
Please give yourself extra time and pay attention to posted speed limits and signage. If weather conditions do not allow this work to take place as originally scheduled, crews will conduct this work at a later date.
Bus Access: RTD, in partnership with the project team, has closed the Bus Route 402L stops on US 85 between County Line Road and Highlands Ranch Parkway to allow crews to work safely. Though some stops are closed, the Route will remain in service. Customers should sign up for RTD’s Service Alerts and use the Trip Planner app to plan an alternate route.
Business Access has permanently changed to right-in, right-out only at private driveways and un-signalized intersections between Highlands Ranch Parkway and C-470. Left turns at Norwood Drive, Carder Court, Brandon Drive, Grace Presbyterian Church, and Spring Gulch Equestrian Area are no longer allowed. View business access changes.
As always, we ask you to please continue to pay extra attention and follow all posted signage through the construction zone. Expect increased enforcement to ensure the safety of crews and motorists. Pedestrians and bicyclists are not permitted in the work zone – please use signed and signaled intersections to cross US 85.
