Boulder County COVID-19 status is at Level Clear | Vaccine locations and info is available in English and Spanish.

Closures & Construction

Construction-Related Travel Impacts

Boulder County Transportation manages the construction projects for roads, bridges, pathways, drainage improvements and trails. The projects listed on this page are related to flood recovery and regularly scheduled roadway maintenance.

Travel Impacts

County Road Projects

US 287 & Isabelle Road Intersection Safety Improvements Project

  • PHASE I CLOSURE of Isabelle Road between US 287 and N. 111th for four or five weeks starting Monday, April 19
  • Closure in place 24 hours a day, 7 days a week
  • Isabelle CLOSED from US 287 St. to N. 111th St.
  • N. 109th Street CLOSED at Isabelle Road during the same timeframe
    • Follow posted detours
    • Flatiron Drive open to local residents only
  • Project Hours are 7 a.m. to 7 p.m., Monday through Saturday
  • Impacts to US 287
    • Daytime, weekday lane closures and traffic shifts on US 287
    • Expect delays – Alternate routes advised
  • PHASE II CLOSURE of Isabelle Road – N. 95th to US 287 once east side closure has been lifted
    • Residential traffic only on Isabelle between N. 95th and US 287
  • Project anticipated to last until August 2021
  • Project Website

2021 Gravel Road Reclamation Program

  • Numerous gravel roads will be reclaimed from April to August 2021
  • Work Hours = 6:30 a.m. to 4:30 p.m., Monday through Thursday
  • Travel on roads being reclaimed will be limited to residents and emergency responders during working hours
  • Learn more

71st Street Construction Project

  • Culvert installation, roadway, and multi-use path/trail improvements
  • January 2021 through June 2021
  • Expect travel delays due to daytime, weekday single-lane closures
  • Project Website

Jay Road resurfacing project requires lane reductions between CO 119 and 28th Street/US 36

  • Lane closures and traffic shifts
  • 8 a.m. to 5 p.m. – Monday through Friday
  • Cyclists will need to merge with traffic when shoulder is under construction
  • Expect delays
  • Project webpage

Thank you for following restrictions! We apologize for any inconvenience.

For more information about Boulder County road travel impacts, please contact – Andrew Barth – 303-441-1032

Projects Impacting Cycling

  • N. 71st Street CLOSED between Lookout Road and CO 52 through March 2021 (project webpage)
  • CDOT lifts Boulder Creek Trail Closure between City of Boulder and Fourmile Canyon Drive

Thank you for following restrictions! We apologize for any inconvenience.

Project Contact – Andrew Barth – 303-441-1032

Non-County Projects

Related Links

Contact Us

Public Works Department (formerly Transportation)

Submit a request


2525 13th Street
Boulder, CO 80304

Map & Directions

Hours: 8 a.m. - 4:30 p.m. M-F

Mailing Address

P.O. Box 471
Boulder, CO 80306