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US 6 Bridges Design Build Project

U.S. 6 over I-25 was originally constructed in 1958.

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Hotline: 720-881-5540
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Explore Commuting Options

If you find it too stressful to drive through the US 6 corridor while it is under construction, you might want to explore alternative modes of transportation. This could include using the Regional Transportation District’s West Rail Line or bus services. Click here for information on RTD’s light rail service. For information on bus fares and schedules, click here.

Exploring carpool or vanpool services is another option you might want to pursue. Click here to access an online trip planner where you can input your starting location and destination address into a database to see if there are existing carpool or vanpool services in your area.

If biking or walking are more your speed for short trips, click here for tips on getting to your destination by foot or bicycle.

Construction Update

Upcoming Activities:

Northbound I-25 to westbound US 6 ramp shift: This weekend, crews will close the northbound and southbound I-25 off-ramps to westbound US 6 to complete and shift traffic onto the new northbound I-25 off-ramp bridge to westbound US 6.

The ramps will close at 10 p.m. Friday, Dec. 19, and reopen by 5 a.m. Monday, Dec. 22.

Effective Monday morning, northbound I-25 drivers will exit to westbound US 6 several hundred feet south of where they are accustomed to, so drivers are encouraged to pay attention.

In conjunction with this work, the northbound I-25 off-ramp to eastbound US 6 will close overnight Friday, Dec. 19, and reopen the morning of Saturday, Dec. 20, in the new exit location.

During this work, the following detours will be in place:

  • I-25 to westbound US 6 detour: Motorists should take Alameda Avenue, 8th Avenue or Colfax Avenue west to Federal Boulevard, then use the Federal Boulevard on-ramp to westbound US 6.
  • Northbound I-25 to eastbound US 6 detour: Motorists should exit at 8th Avenue and go east to Kalamath Street, then south on Kalamath back to 6th Avenue.

Click here for detailed information about the new northbound I-25 off-ramp to westbound US 6, including a graphic and specific details about the final configuration of the ramp and how it serves the bigger picture of the project.

Girder placement on a segment of the northbound I-25 to westbound US 6 off-ramp bridge: Beginning at 10 p.m. on Saturday, Dec. 20, commuters should watch for various lane closures on northbound I-25 between the hours of8 p.m. and 5:30 a.m. in conjunction with this work.

Girder placement on the Federal Boulevard bridge over the new westbound US 6 collector-distributor road: Beginning at 10 p.m. on Sunday, Dec. 21, crews will reduce Federal Boulevard to one lane of traffic in each direction overnight, between the hours of 7 p.m. and 5:30 a.m. All lanes on US 6 will remain open.

Ongoing Impacts:

Commuters are advised to use caution and drive carefully through the new traffic alignment on US 6. Lanes have been narrowed slightly and the posted speed limit reduced to 45 mph.

Ongoing traffic impacts currently in place:

  • Limited access to westbound US 6 off-ramp to Federal Boulevard: Crews have shifted the southbound I-25 off-ramp to westbound US 6 into its new, permanent location. Because this new ramp connects to US 6 at a point that is much closer to Federal Boulevard than the old ramp, there would have been the potential for merge conflicts between drivers trying to get onto westbound US 6 from southbound I-25 with drivers trying to exit onto Federal Boulevard from either northbound I-25 or westbound US 6.  To eliminate this potential conflict, northbound I-25 and westbound US 6 drivers are temporarily unable to access the westbound US 6 off-ramp to Federal Boulevard. Traffic is still able to access Federal Boulevard if exiting southbound I-25 onto westbound US 6. This configuration will last approximately two months.
  • The Lowell on-ramp to eastbound US 6 will remain closed until Spring 2015.
  • The Bryant Street on and off-ramps are also closed for about one year for construction of the collector-distributor roads on both sides of US 6.
  • The Osage Street on-ramp to westbound US 6 is closed until early 2015 while crews continue reconstruction of the US 6 bridges over I-25 and the BNSF railroad tracks. To detour around this closure, motorists should take Osage Street to 3rd Avenue, 3rd Avenue to Santa Fe Drive, Santa Fe Drive to 8th Avenue, 8th Avenue to Kalamath Street, and Kalamath Street south to access westbound US 6.
  • All lanes on Federal Boulevard have been narrowed and southbound Federal is reduced to two lanes as efforts are under way to rebuild this bridge over US 6.

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