County Line Road closes for 100 working days in Douglas County

County Line Road closed for 100 working days between University Boulevard and Broadway as Douglas County pushed ahead with its widening and reconstruction project on a key south metro Denver corridor. The shutdown affected a stretch used for commutes, school runs, neighborhood access and business traffic, forcing drivers to plan for longer trips and a different route pattern.

Douglas County identified the work as the County Line Road Widening and Reconstruction project. The county said in January 2026 that the 100-day closure was coming, making clear that the interruption was not a short repair but a prolonged construction phase on one of the area’s main connectors. The closed segment ran between University Boulevard and Broadway, a location that carries daily traffic across the Douglas County side of the metro area.

A closure of that length has implications beyond simple delay. Widening and reconstruction can slow access for delivery trucks, transit routes and emergency vehicles while crews rebuild the roadway. For nearby residents, the practical issue was how to move through the area while the road was out of service and how much extra time to allow for school drop-offs, work commutes and trips to nearby businesses.

Douglas County later posted that County Line Road was open again between University Boulevard and Broadway, marking a major milestone in the project. The reopening showed that the closure was part of a defined phase of work rather than a permanent shutdown, but the county also said more improvements were still coming.

JHL Constructors lists County Line Road Improvements among its projects, matching the county’s description of a contractor-led roadway upgrade. For drivers in Douglas County, the episode underscored how a single corridor project can ripple through traffic patterns across south metro Denver long after the first detour signs go up.