US 85 Corridor Improvements (Douglas County)

About the Project:

Douglas County and the Colorado Department of Transportation are partnering on a multimodal transportation project to increase mobility along 2.5 miles of US 85 (Santa Fe Drive) from Highlands Ranch Parkway to C-470. Construction started in early October 2022. The project will widen US 85 from four to six lanes, replace and widen the existing bridge that carries US 85 over C-470. 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.

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 Senior 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.

For the latest information on this project, including construction schedule, impacts and updates, go to the Douglas County project website.