Closures ahead on I-25 at County Line Road

Travel Advisory

July 1, 2021 - Central/Eastern and Southeastern Colorado - Drivers should expect 30-minute delays for bridge demolition

DOUGLAS/EL PASO COUNTIES – The Colorado Department of Transportation is closing Interstate 25 for several nights next week to allow for the safe demolition of the County Line Road Bridge on Monument Hill.  

Northbound and southbound I-25 traffic will detour around the closure points at the County Line Road Interchange (exit 163) for up to 17 hours. Delays of 30 minutes are expected.  

Tuesday, July 6

  • Northbound I-25 closed – 8 p.m. Tuesday, July 6 to 5 a.m. Wednesday, July 7
  • Southbound I-25 closed – 8 p.m. Tuesday, July 6 to 5 a.m. Wednesday, July 7

Wednesday, July 7:

  • Northbound I-25 closed – 6 p.m. Wednesday, July 7, to 7 a.m. Thursday, July 8
  • Southbound I-25 closed – 7 p.m. Wednesday, July 7, to noon Thursday, July 8

Thursday, July 8 & Friday July 9:

  • Northbound I-25 closed – 6 p.m. to 7 a.m.
  • Southbound I-25 closed – 7 p.m. to 8 a.m.

Demolition work also requires a closure of County Line Road at I-25, requiring drivers to use the CO 105 interchange and Monument Hill Road to access areas east and west of the interstate.

County Line Road Bridge Closure Map

At the conclusion of these extended closures, crews will require various closures of the County Line Road Bridge and I-25 for overhead bridge work, such as girder sets and deck pours. In addition, a six-week closure of the northbound I-25 on- and off-ramps at the County Line Road Bridge is required to reconstruct the ramps into a new alignment.

Vehicle Length Restrictions Begin Friday, July 2, at County Line Road

Due to ongoing bridge construction, left turns will be restricted for vehicles over 35 feet:

  1. No left turns on the bridge from northbound I-25 to westbound County Line/Palmer Divide Road
  2. No left turns on the bridge from southbound I-25 to eastbound County Line/Palmer Divide Road

These restrictions are expected to remain in effect throughout bridge construction for the safety of crews and the traveling public. Please use CO 105 (exit 161). Once the bridge opens, watch for lower speeds and narrower lanes. 

Construction schedules are weather-dependent and could change. Current information is available on or by following the project on Facebook (@I25SouthGapProject). To receive text alerts, text I25GAP to 21000.

About the County Line Road Bridge

The County Line Road bridge (circa 1964) is one of five bridges being replaced as part of the 18-mile I-25 South Gap project between Monument and Castle Rock. The County Line Road bridge will double in size to accommodate one through-lane and one turn-lane in each direction, and wider shoulders on each side. Major bridge reconstruction is expected to be complete by the end of 2021. Construction of the entire 18-mile corridor, including the surrounding County Line Road bridge area, is slated for November 2022. The project is on-schedule and on-budget.

Project Information

County Line Bridge Construction Phases Graphic

  • Project Hotline: 720-745-5434
  • Web:
  • Sign up for email updates: [email protected]
  • Text alerts: Text I25GAP to 21000
  • Project Facebook Page:

About the Project

CDOT is improving 18 miles of I-25 between Monument and Castle Rock by widening the highway from two to three lanes in each direction. The new lane will operate as an Express Lane, allowing motorists the choice of taking the Express Lane for a faster, more reliable travel time in exchange for a toll. Express Lanes will be free to vehicles with three or more people and motorcycles. All travelers will have the choice of taking the general-purpose lanes for free.

The $419.5 million project also includes shoulder widening, rebuilding bridges, new wildlife crossings, resurfacing with new pavement and modernizing technology. Project completion is scheduled for 2022.

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.
  • Anticipate lane shifts and merge when directed to do so
  • Expect delays, especially during peak travel times.
  • Allow ample space between you and the car in front of you.
  • 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.
  • Be patient!