Lone Tree Creek Trail Underpass at Arapahoe Rd.

Overview

The City of Centennial is constructing a new dedicated underpass to improve trail connectivity and safety along the Lone Tree Creek Trail corridor at E. Arapahoe Road. The project includes construction of a concrete box culvert under E. Arapahoe Rd., which will be dedicated to bicyclists and pedestrians. It will allow trail users to travel beneath the roadway, eliminating the need to cross traffic at the existing Revere Parkway crosswalk.

Project Location: E. Arapahoe Rd. between S. Revere Pkwy. and S. Potomac St.

Project Timeline: Construction begins April 2026 and ends Winter 2027.

Traffic Impacts

E. Arapahoe Rd. Traffic Impacts


 Three lanes of traffic will remain open in both directions of E. Arapahoe Rd. during peak travel hours. Motorists can expect intermittent single-lane and double-lane closures on E. Arapahoe Rd. during the following off-peak travel hours:

Eastbound E. Arapahoe Rd.
Monday - Friday, 9 a.m. to 3 p..m.

Westbound E. Arapahoe Rd.
Monday - Friday, 10 a.m. to 3 p.m.

Sidewalk closures along both directions of E. Arapahoe Rd. will occur at different times depending on the construction phase (see project phasing below) with a signed detour in place.

E. Arapahoe Rd. & Revere Pkwy. Traffic Impacts

For the duration of the project, all left turn movements at the intersection of E. Arapahoe Rd. and Revere Pkwy. will be restricted, and motorists cannot proceed straight on Revere Pkwy. across Arapahoe Rd.

Only right turn movements will be maintained during construction at this intersection. Motorists are encouraged to use S. Peoria St. and S. Potomac St. as alternate travel routes.

Lone Tree Creek trail underpass at Arapahoe Rd map

Project Phasing

Construction will be completed in three phases with traffic shifts on E. Arapahoe Rd. to allow crews to safely work behind Temporary Concrete Barriers.

Phase 1 – North Side of E. Arapahoe Rd.

  • Work includes extending the existing culvert that carries Lone Tree Creek and beginning construction of the new concrete box culvert under westbound E. Arapahoe Rd., along with associated walls.
  • E. Arapahoe Rd. traffic will shift to the south and the sidewalk along westbound E. Arapahoe Rd. will be closed with a signed detour route.
  • Duration: April - July 2026

Phase 2 – Middle of E. Arapahoe Rd.

  • Work includes continued construction of the new culvert under the left turn lanes on westbound E. Arapahoe Rd. 
  • Traffic will be shifted to the outside of eastbound and westbound E. Arapahoe Rd. The sidewalk along both directions of E. Arapahoe Rd. will remain open.
  • Duration: August - September 2026

Phase 3 – South Side of E. Arapahoe Rd.

  • Crews will complete the new concrete box culvert and connect the underpass to sidewalks/trail connections, and finish sidewalk work.
  • E. Arapahoe Rd. traffic will be shifted to the north and the sidewalk along eastbound E. Arapahoe Rd. will be closed with a signed detour route.
  • Duration: October 2026 - Winter 2027

Project Benefits

Upon completion, the project will provide a dedicated underpass for bicyclists and pedestrians, improving safety and connectivity for Lone Tree Creek Trail users across E. Arapahoe Rd.

Questions

Email the project team at lonetreetrailunderpass@gmail.com or call the project team at 720-656–5724 for questions.

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