New Arapahoe & Clarkson Traffic Signal

yellow block at Arapahoe & Clarkson showing placement of new signal and green along Clarkson showing bikes lanes

Overview

Centennial Public Works is installing a new traffic signal that includes pedestrian signals, pavement marking modifications, lighting and striped crosswalks at Arapahoe Rd. and Clarkson St.

This project was selected for funding by the Colorado Department of Transportation (CDOT) and the Denver Regional Council of Governments (DRCOG) as part of the Safer Main Streets Initiative. In 2020, the Safer Main Streets Initiative was created to support infrastructure projects that improve safety and accessibility along urban arterials (non-freeway corridors in the Denver Metro area). This initiative focuses on vulnerable users, such as pedestrians, bikers, motorcyclists, transit users, the elderly and those with disabilities.

Project Location

The signal will be installed at the intersection of Clarkson Street and Arapahoe Road, with pavement marking modifications occurring on Clarkson Street from Arapahoe Road to E. Panama Drive.

Project Timeline

Construction began in June 2025, with an estimated completion of Fall 2025.

Project Benefits

Clarkson St. runs the entire length of Centennial from north to south with traffic signals at all major arterial roadways except for Arapahoe Rd. Currently, the nearest signalized crossings on Arapahoe Rd. are to the west at Broadway or to the east at Franklin St. Upon completion, the new traffic signal will make it easier and safer for residents to travel north to south along Clarkson St. Bicyclists will also be able to connect to the High Line Canal Trail north of Arapahoe Rd. as well as a route to the C-470 trail connection just south of County Line Rd.

Traffic Impacts

Motorists can anticipate occasional lane closures on Arapahoe Road from 8:30 a.m. to 3:30 p.m., Monday through Friday. Minor traffic impacts can be expected on Clarkson St. for striping. Brief traffic holds are anticipated during signal pole and arm installation.

Questions?

Contact the Citizen Response Center at 303-325-8000.

Please continue to check this page for additional project updates.

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