Roadway Projects

Image of Centennial Public Works In-Action

1. Overview


The City of Centennial commits to strategic and budgetary planning for the construction of new improvements and preservation of the City’s infrastructure.

Improvements may include street rehabilitation, road widening, new traffic signals, new recreational trails, parks and other pieces of infrastructure.

View Roadway Projects

There are two ways to view details on roadway projects taking place in Centennial. You can select projects linked in the Table of Contents above, or click the next and previous buttons below.

2. Arapahoe Road Bridge Replacement

Project: Arapahoe Road Bridge Replacement over Big Dry Creek
Entity: City-led
Estimated End: By the end of 2023

Learn more about this project on the Arapahoe Road Bridge page.

3. Arapahoe Road Improvement Project

Project: Arapahoe Road Improvement

Project Overview: Arapahoe County has identified operational and safety improvements for Arapahoe Road between South Lewiston Way and South Buckley Road. Operational and safety concerns identified include traffic congestion that blocks the eastbound to northbound left-turn lane movement to Olathe Street. As well as eastbound Arapahoe Road to northbound Buckley Road left-turners, causing additional congestion. 

Arapahoe Road Improvement Recommendations Include: 1) Extending the turn lanes for eastbound Arapahoe Road to northbound South Buckley Road. 2) Closing the median break at Olathe Street. 3) Extending the turn lanes for westbound Arapahoe Road to southbound South Lewiston Way. 

For more information and updates please visit the Arapahoe County website.

4. Broadway Corridor Study

Project/Study: Broadway Corridor Study

Study Overview: The City of Littleton is leading a study of the Broadway Corridor between I-25 and Highlands Ranch Parkway. This 11-mile stretch of Broadway provides local and regional connections through the City and County of Denver, Arapahoe County, Douglas County, the cities of Englewood, Littleton and Centennial. This project is a joint effort with these agencies to review the transportation and land use conditions along this section of Broadway.

The study will establish a cohesive vision for the corridor’s future and identify improvements to celebrate and connect the unique identities of the surrounding communities, foster economic vibrancy, provide safe and comfortable spaces, and support regional mobility options for all.

Throughout the study, the city of Littleton will provide several additional collaboration opportunities for residents and businesses to share ideas on how to improve the experience along Broadway.

Project website: Visit for more information.

5. Orchard Road Bridge

Project/Study: Orchard Road Bridge Road Closure Notice: Orchard Road (S. University Blvd. to S. Broadway)

Study Overview: Orchard Road will be closed to traffic between S. University Boulevard and S. Broadway from Thursday, June 1 to Friday, June 30 to complete repairs on the bridge. Drivers should take the detours on E. Belleview Avenue, S. University Boulevard, S. Broadway and E. Arapahoe Road. The High Line Canal Trail will remain open for pedestrians and bicyclists to cross Orchard Road. However, the north and south sidewalks on the bridge will be closed to bicyclists and pedestrians during this time.


Project website: For more information, visit the Project Webpage, email Greenwood Village Public Works at or call 303-708-6100.

6. Orchard Road Widening

Project: Orchard Road Widening
Estimated Completion: December 2023
Project Description: The intent of this project is to widen the south side of Orchard Road from Ogden Court east to the High Line Canal, adding a curb and gutter, sidewalk, and an underground storm line. The City is working in collaboration with the Southeast Metro Stormwater Authority (SEMSWA) and a design consultant to add curb, gutter, sidewalk, storm sewer infrastructure, and an additional turn lane on Orchard Road from S. Ogden Ct. to the High Line Canal. Xcel will be undergrounding their power lines within these limits and east to S. University Blvd. Other telecommunication utilities will be relocating their infrastructure out of the way for the City’s project.



7. S Alton Way Sidewalks and Street Lighting

Project: S Alton Way Sidewalks and Street Lighting
Estimated Completion: June 2023
Project Description: The City is working alongside the Southgate at Centennial Metropolitan District and Southeast Public Improvement Metro District (SPIMD) to construct a new attached sidewalk to complete a pedestrian connection through S Alton Way. This project will install new street lighting as well with options of innovative smart lighting systems.

Below is a conceptual design map. Please note that the blue line is the proposed sidewalk and yellow is the extent of the new lighting installation. There is also a proposed crosswalk where S. Alton Ct connects with S. Alton Way.

map showing new sidewalk along S Alton Way

8. Southgate Water Main Replacement Project

Project: Southgate Water Main Replacement
Estimated Completion: November 2023

Traffic Alert: Yosemite St. Lane Closures to Begin May 1 between County Line and Easter

Project Description: The Southgate Water District is replacing a 60-year cast iron water main that runs under Yosemite Street. The Centennial stretch of Yosemite St. from County Line Rd. to Easter Rd. is scheduled to begin on May 1 and will include various lane closures. Work is anticipated to be complete in November 2023 and delays should be expected. Alternate routes are advised.

This water main was originally installed in 1962 and has had two significant failures in the last eight years. The total extent of this large and complex project is from Easter Avenue in Centennial to Brook Hill Drive (near Lincoln Ave.) in Lone Tree. The Centennial portion consists of the replacement of 8,600 feet of water line.

Ongoing updates, schedules and emergency contacts are available on Southgate Water District’s website at

9. Street Rehabilitation Program

Project: The City of Centennial is regularly conducts street rehabilitation and creates a map of upcoming projects. Click below to view the 2023 Street Rehabilitation Program.
Entity: City-led

View the 2023 Street Rehabilitation Projects Map