I-25 and Fillmore Street Interchange


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.

JAN Bridgework3
Crews set girders for eastbound bridge structure December 2015

Project Progress

The project is approximately 69 percent complete and on pace to conclude by summer 2016.  

Major milestones for 2015 include:

  • A two weekend fast-track in August to completely rebuild intersections
  • The completion of Phase 1 bridge removal in  September
  • Traffic switch onto the completed westbound bridge structure
  • New traffic pattern at Sinton Road and Fillmore in place in November
  • Eastbound bridge structure work completed in December, which included Bridge Girder installation, Deck Panel placement, and Bridge Deck pour

Upcoming work includes the installation of Mechanically Stabilized Earth (MSE) walls on the westbound bridge structure. Bridge work will include bridge rail and pedestals. Also, sleeper and approach slabs will be installed, which will provide support for the bridge abutments and the road base.

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. Pedestrians are advised to utilize only the designated crossing paths on the south side of Fillmore.  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.

For more information visit:

Colorado: The Official State Web Portal