I-25 and Fillmore Street Interchange

Crews install waterproofing membrane to completed westbound brdige structure


The Colorado Department of Transportation (CDOT) continues work on an interchange reconstruction project at Interstate 25 and Fillmore Street in El Paso County in Colorado Springs. The project will convert the existing interchange into a Diverging Diamond Interchange (DDI), the second along the Front Range and the third in the State of Colorado.

SEMA Construction Inc. is the primary construction contractor for this project, which cost $15.1 million.

Upcoming Closure

For 2 consecutive nights during the week of November 23, from 9 p.m. to 5 a.m., both northbound and southbound lanes on I-25 will be closed at the Fillmore Street exits to accommodate bridge girder erection work. These closures will be in place to ensure the safety of the travelling public, so motorists do not drive through the construction zone while crews set girders above the highway. Following the girder erection, bridge deck pour will take place in early December. 


At Fillmore Street, I-25 traffic will be detoured off the highway at the off-ramps and routed back onto the highway using the on-ramps. Fillmore Street will be closed between the I-25 northbound and southbound ramps. Motorists can turn right off the ramps, but will not be able to turn left onto Fillmore Street.

There will be signed detours along I-25 to direct motorists around the work. Detours will include utilizing the Garden of the Gods and Fontanero exits.

Pre-deck placement on westbound bridge structure
Project Progress

To date the project is approximately 52 percent complete and on pace to conclude in summer 2016. Major milestones this quarter include the completion of Phase 1 bridge removal on September 24, 2015, as well as a two weekend fast-track to completely rebuild intersections. A traffic switch onto the completed westbound bridge structure was also achieved this quarter. Upcoming work will focus on constructing the eastbound bridge structure. This will include setting girders as support in preparation for additional bridge construction. With this year’s progress, crews are on schedule to complete the project by summer 2016. 

Schedule and Traffic Impacts

Normal working hours are from Monday through Friday from 7 a.m. to 5 p.m. There will be some nighttime and weekend work as needed.

The speed limit is reduced in the construction zone on I-25 to 55 mph for both the safety of the traveling public as well as construction crews working along the highway.

Business access will be maintained.

Construction crews will accommodate pedestrians and bicyclists through the construction zone as much as possible. Please use caution and stay alert while traveling through the construction zone. Follow flaggers’ directions and reduced posted speed limits.

About the DDI

The Diverging Diamond Interchange transitions traffic from one side of the road to the opposite side. This innovative interchange will improve safety and traffic flow through the corridor to meet existing and future travel demands.

As part of this project, two new bridges will be constructed to replace the current bridge structure, which was built in 1960 and widened in the 1970s. Each bridge will be approximately 220 feet long, with a 14-foot-wide sidewalk on the eastbound side for pedestrian use. There also will be 5-foot-wide bicycle lanes eastbound and westbound on both bridges. In addition, the southbound off-ramp and northbound on-ramp for I-25 will be lengthened to accommodate the amount of traffic utilizing this route.

Project Contacts

If you have questions about the project, contact the Public Information Team. You will receive a response within 24 hours.
Phone: 719-367-4884

Media Contact:
Bob Wilson
CDOT Communciations Manager

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