I-25 & CO 7 Interim Transit Improvements

About the Project

The interim transit improvement project is located at the I-25 and CO 7 (Exit 229) interchange. Primary work includes:

• Building Bustang slip ramps for the I-25 northbound off-ramp and I-25 southbound on-ramp
• Building a pedestrian bridge over I-25

Other work includes:

• Adding sidewalks
• Replacing traffic signals
• Building a park-n-ride lot in the southeast corner of the interchange
• Installing the Permanent Water Quality pond to accommodate the future mobility hub project

Work this Week & Lane Closures on I-25 & CO 7 (Exit 229)

Project Facts

• Construction Cost: $13.4 Million
• Contractor: HEI Civil
• Timeline: March 2025 to August 2026
• Location: I-25 at the CO 7 junction (Exit 229) 
  • Nearest Towns/Cities: Thornton, Lafayette, Broomfield and Brighton
  • Mile Point(s): MP 228 to MP 230
  • Counties: Broomfield and Adams

Project Benefits

• Implement much-needed multimodal transportation improvements
• Optimize regional connectivity and mobility
• Provide faster and more reliable travel times
• Increase access to multimodal transit options

Work Schedule

• Work is set to begin in mid-March 2025 to August 2026 and will last for approximately 16 months
• Working hours are 7 a.m. to 5 p.m. Monday to Friday

Traffic Impacts

Motorists can expect the following impacts during the period of construction:

• Occasional full ramp closures to and from I-25 at CO 7 (Exit 229) with detour routes posted
• Ramp lane closures to and from I-25 from CO 7 during overnight hours
• Overnight lane closures in both directions of I-25 within the project limits
• Signs and construction devices will be present to alert motorists to lane closures, traffic shifts and other work zone restrictions
• Refer to COtrip.org for real-time travel conditions and road closures