CDOT, Boulder County to begin resurfacing Isabelle Road at US 287 on April 19

News Release

April 14, 2021 - Northeastern Colorado

BOULDER COUNTY — Starting April 19, the Colorado Department of Transportation, Boulder County and Contractor partner, Concrete Works of Colorado, will begin resurfacing Isabelle Road at the US 287 intersection. 

Work on this project will improve safety and driving conditions at this intersection. Some of the safety improvements include, widening of Isabelle Road from 109th Street to 800 feet west of US 287, striping of new buffered bike lanes on Isabelle Road and across US 287, lengthening of turn lanes on Isabelle, new dual left-turn lanes for westbound traffic, new traffic signals on raised islands, new pedestrian crossings, new street lighting and the realignment of Isabelle Road and 109th Street intersection. There is not enough room in the work zone to complete all safety improvements without closing Isabelle Road.

“Addressing the safety concerns at US 287 and Isabelle Road is a priority for CDOT,” Regional Transportation Director Heather Paddock said. “We thank the surrounding communities for their patience as we complete this important work. The partnership between CDOT and Boulder County on this project will result in a safer intersection for the traveling public and local community.”

Travel Impacts Phase I

  • Isabelle Road CLOSED between US 287 and N. 111th Street

  • 24-hours a day, seven days a week

  • No cars, bikes or pedestrians 

  • Closure will last for approximately five weeks

Travel Impacts Phase II

  • Starts after Phase I has been completed and Isabelle Road is reopened between US 287 and N. 111th

  • Isabelle Road CLOSED between N. 95th and US 287

  • 24-hours a day, seven days a week

  • No cars, bikes or pedestrians

  • Residents of Isabelle Road along this stretch will need to access their homes from N. 95th

  • Closure will last for approximately five weeks

During the road closures, crews will be working 7 a.m. to 7 p.m., Monday through Saturday. Traffic shifts on US 287 may also be necessary during working hours, so travel may be impacted on this road as well. Detours will be posted directing traffic to Arapahoe Road. 

Project Background

Concrete Works of Colorado, of Lafayette, Colorado, is the prime contractor on this $3.5M project. 

Project Information

Get direct email announcements and updates by emailing [email protected]. For additional information about this project, call the local project information line at 720-745-6848, or visit the project website at Information about weekly lane closures is available at For information regarding CDOT projects statewide, log on to Updates are also available via Twitter @coloradodot and be sure to “Like” our Facebook page:  

Remember: Slow for the Cone Zone

The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.

  • Stay Alert! Expect the unexpected.

  • Watch for workers. Drive with caution.

  • Don't change lanes unnecessarily.

  • Avoid using mobile devices such as phones while driving in work zones.

  • Turn on headlights so that workers and other drivers can see you.

  • Be especially alert at night while driving in work zones.

  • Expect delays, especially during peak travel times.

  • Allow ample space between you and the car in front of you.

  • Anticipate lane shifts and merge when directed to do so.

  • Be patient!

About CDOT

CDOT’s Whole System-Whole Safety program has one simple mission — to get everyone home safely. Our approximately 3,000 employees work tirelessly to reduce the rate and severity of crashes and improve the safety of all modes of transportation. The department manages more than 23,000 lane miles of highway, more than 3,000 bridges and 35 mountain passes. CDOT also manages grant partnerships with a range of agencies, including metropolitan planning organizations, local governments and airports. It also operates Bustang, the state-owned interregional express bus service. Gov. Jared Polis has charged CDOT to further build on the state’s intermodal mobility options.