County Line Road Expansion

The City of Littleton is partnering with the City of Centennial, Highlands Ranch Metropolitan District, and Arapahoe and Douglas Counties in a project to expand County Line Road. Beginning at South Broadway, the project extends along County Line Road for approximately 1.5 miles east to University Boulevard. The majority of County Line Road is four lanes; however, between Broadway and University Boulevard, the roadway has two unfinished and substandard continuous travel lanes with no curb or gutter, no six foot sidewalks, limited ADA accessibility, poor drainage, poor vertical sight distance, and lack of good connections between the adjoining neighborhoods and C-470. Further complicating the corridor’s reliability, there are portions of the roadway that sit below the two- to five-year storm events, causing Lee Gulch to overtop the roadway surface at times. The expansion will be an improved four-lane, divided urban arterial with a raised center median and sidewalks, which matches the existing County Line Road both east and west of the two-lane section. The project’s drainage improvements will resolve the Lee Gulch over-topping and will include a traffic signal at the Clarkson Street intersection. Additional pedestrian and bike connections will be included to improve neighborhood access to the C-470 Regional Multi-Use Trail. Finally, a sound wall will be constructed to minimize noise impacts from the roadway and preserve the livability of the adjacent neighborhoods. The total cost of the project is $20 million and a funding request from the Denver Regional Council of Governments (DRCOG) Transportation Improvement Program has been awarded. The cost break out is $10 million from DRCOG, $4.5 million from the City of Centennial, $4.5 million from Douglas County and $1 million from the City of Littleton. The majority of the project design and right-of-way work will be completed before 2022, with construction in 2022 – 2023. The project also includes elements that will allow each city to showcase its entryways and share the unique elements that say, “This is our city – Welcome!”