US 85 Corridor Improvements (State Highway 67 to County Line Road)

Updated July 14, 2015



In 2002, CDOT and Douglas County completed a South I-25/US 85 Environmental Impact Statement (EIS) and Revised Record of Decision (ROD) outlining a set of improvements to address transportation needs in the region.  Since then Douglas County has helped provide funding to construct improvements on several segments of US 85. As additional residential and commercial growth occurs in the northwest portion of the county, further studies are needed to identify what transportation improvements are necessary to support the development. Accordingly, in the summer of 2015, Douglas County initiated two important studies of US 85. The two studies are separate but will be closely coordinated at each step in the process to allow citizen and stakeholder input.  For more project information please visit

Douglas County US 85 Corridor Study (PEL Study)

The goal of the Douglas County US 85 Corridor Study, known formally as a Planning and Environmental Linkage (PEL) Study, is to update previous recommendations for transportation improvements to US 85 from approximately State Highway 67 in Sedalia to 1/2 mile north of County Line Road.  The study will help the county and other agencies identify the long term transportation needs beyond 2040 – though many of the identified improvements could be implemented much sooner.  The project will define a “Purpose and Need” that will focus on traffic issues including accidents and will be used to direct information gathering and development of alternatives during the study.  The Corridor Study will ultimately identify a corridor vision and implementation plan outlining the environmental clearances and design steps required to build the recommended improvements.

Douglas County US 85 Early-Action Project

The goal of the Early-Action Project is to update the 2002 Record of Decision (ROD) to address changes to conditions that have occurred since it was issued by the Federal Highway Administration, and to reanalyze impacts of recommended improvements for Highlands Ranch Parkway to Blakeland Drive. Douglas County has obtained funding from the Denver Regional Council of Governments to construct the Early-Action Project. The Early-Action Project will identify improvements to improve capacity, operational performance and safety for anticipated traffic volumes in 2040.  The project will assist the County and other agencies in identifying issues of importance in order to implement the highest-priority near-term improvements as soon as possible.

Funding Allocation for the US 85 Corridor

As part of the 2016 Adopted Budget, the County allocated approximately $15 million (which includes re-appropriations) to advance numerous improvements along US 85 which are estiated to cost over $100 million to construct.  Douglas County funding is being used to leverage State and Federal funds.

You may also contact Art Griffith, (Douglas County Transportation Capital Projects Manager), via email at