Full weekend closure of I-270 & US 36 bridge over I-25 in Adams County set for Oct. 23 to 26

Project Announcement

Adams County - The Colorado Department of Transportation will temporarily close the eastbound Interstate 270 and US Highway 36 bridge over I-25 on Friday, Oct. 23 at 10 p.m. through Monday, Oct. 26 at 6 a.m. The full closure is required to install new modular expansion joints. These components safely absorb structural movements while maintaining a continuous, smooth surface for traffic.

The I-270 off-ramp to northbound I-25 will also be closed. Full closures increase safety for the traveling public and crews while decreasing the duration of traffic impacts.

Detours will be in place:

• Eastbound US 36 and I-270 traffic will exit onto southbound I-25, then use the right two lanes to take exit 214A, and merge onto eastbound Interstate 70.
• Eastbound US 36 traffic entering northbound I-25 will turn left onto N. Federal Boulevard (US Highway 287), turn right onto West 120th Avenue (CO Highway 128), and turn left to enter northbound I-25.

A second weekend closure is also planned for Friday, Nov. 6 at 10 p.m. through Monday, Nov. 9 at 6 a.m. to complete the expansion joint installation. The construction schedule could change depending on the weather and other factors. Go to COtrip.org for real-time road conditions and closures.

This work is part of the I-270 Bridge Preventative Maintenance Phase 2 project that began in March 2026. Crews are proceeding with the second and final phase of the project, focusing on ground improvements throughout the remaining portions of the work zone. These improvements will strengthen the subgrade beneath the existing roadway and bridge embankments, helping prevent settlement and soil-related issues for years to come.

Travel Impacts

• Full closure of eastbound US 36 and I-270 bridge over I-25, Friday, Oct. 23 at 10 p.m. through Monday, Oct. 26 at 6 a.m.
• Full closure of eastbound US 36 and I-270 bridge over I-25 planned for Friday, Nov. 6 at 10 p.m. through Monday, Nov. 9 at 6 a.m.
• Full closure of the I-270 off-ramp to northbound I-25
  • Motorists should follow posted detours
• Nighttime work hours are 10 p.m. to 6 a.m., Sunday through Thursday
• Daytime work hours are 7 a.m. to 7 p.m., Monday through Friday, continuing through October 2026
• Motorists are advised to drive with extreme caution as the travel lanes will be narrowed and crews with heavy equipment will be working in the area
• 15 to 20-minute traffic delays are expected

The project is anticipated to be completed by early November 2026.

Project Information

For additional information about this project:

• Call the project information line at 720-440-2192
• Email the project team at: [email protected]
• Visit the project website at: codot.gov/projects/i270us36bridgemaintenance

Know Before You Go

Travelers are urged to "know before you go." Gather information about weather forecasts and anticipated travel impacts and current road conditions prior to hitting the road. CDOT resources include:

• Road conditions and travel information: COtrip.org
• Download the COtrip Planner app: bit.ly/COtripapp
• Sign up for project or travel alerts: bit.ly/COnewsalerts
• Check scheduled construction lane closures: bit.ly/laneclosures
• Connect with @ColoradoDOT on social media: X, Facebook, Instagram and YouTube

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!

Download the COtrip App!

The new free COtrip Planner mobile app was designed to meet the growing trend of information on mobile and tablet devices for the traveling public. The COtrip Planner app provides statewide, real-time traffic information, and works on mobile devices that operate on the iOS and Android platforms. Visit the Google Play Store (Android devices) or the Apple Store (iOS devices) to download!