C-470 Express Lanes

roject Facts

  • Location: 12.5 miles of C-470, from I-25 to Wadsworth Boulevard
  • Cost: $276 million

Current and Upcoming Activities

Wadsworth to Santa Fe:
Traffic has been shifted onto new permanent concrete pavement and the newly constructed S Platte River Bridge eastbound between Platte Canyon and Santa fe; demo work of the old eastbound S Platte River bridge has begun; currently the Mary Carter Greenway Trail at the S Platte River is closed. Follow posted detour signs.

Santa Fe to Lucent:
Subgrade treatment; drainage installation; wall construction; Erickson bridge approach slab work; concrete paving soon to take place.

Lucent to Quebec:
Concrete paving including tie-ins at University and Broadway bridges and ramps as well as in the center median; subgrade treatment; guardrail and overhead sign installation; drainage work including pipe bore; ITS (light poles and tolling infrastructure in median); bridge deck repair at Broadway and University.

Quebec to I-25:
Earthwork; drainage pond grading and pipe installation; soil nail wall construction in I-25 interchange area; ITS; bridge rail work at Yosemite; Willow Creek trail now open; permanent barrier; temporary asphalt paving in median; installation of overhead signs; trail paving; caissons work continues for the new westbound to westbound flyover bridge; bridge girder set coming soon.

Lane Closures

8 p.m. -5:30 a.m. Tuesday-Thursday
Alternating right and left lane closures on east and westbound C-470; traffic pace between I-25 and Wadsworth; eastbound University off-ramp full closures for ramp construction;

8:30 a.m.-3:30 p.m. Monday-Friday:
Right- and left-lane closures on Erickson, Acres Green, University and Yosemite; partial ramp closures on Broadway, Lucent and University; traffic pace on east and westbound C-470; northbound I-25 to County Line off-ramp closures.

7 p.m. - 5:30 a.m. Monday-Friday:
Alternating right- and left-lane closures on eastbound and westbound C-470; single-lane closures on Yosemite, Acres Green, Broadway, University and Erickson; full ramp closures possible at Santa Fe, Broadway, County Line and University.

8 p.m. - 8 a.m. Saturday and Sunday:
Alternating right- and left-lane closures on eastbound and westbound C-470; full ramp closures possible at Santa Fe, Quebec and University.

Full Closure of Westbound C-470, Rescheduled

What: As part of the C-470 Express Lanes Project, crews will conduct full closures of westbound C-470 from I-25/E-470 to Quebec St. These closures are necessary to erect the pier columns for the new E-470 to westbound C-470 express lane bridge.

When: Monday, June 18 through Thursday, June 21 Sunday, June 24 through Thursday, June 28  and Sunday, July 1 through Monday, July 2 from 10 p.m. to 5:30 a.m.

Detour: Westbound detours are approximately 2.8 and 4.4 miles long. See map below.

  • Northbound I-25 to westbound C-470 detour: Take northbound I-25 and exit onto County Line Rd. west. Continue on County Line Rd. to Yosemite St. and turn left. Take Yosemite St. to the C-470 westbound on-ramp.
  •  Southbound I-25 to westbound C-470 detour: Take southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. to Yosemite St. and turn right. Take Yosemite St. to the westbound C-470 on-ramp.
  • Southbound E-470 to westbound C-470: Take southbound E-470 to southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. to Yosemite St. and turn right. Take Yosemite St. to the westbound C-470 on-ramp.

Mary Carter Greenway Trail Full Closure

What: Northbound and southbound Mary Carter Trail will be closed to demo the old eastbound South Platte River Bridge.

When: Beginning June 18 for approximately 2 weeks. Trail will be closed 24/7.


  •  Western Detour: Take the C-470 Bikeway trail west on the south side of C-470 along Chatfield Lake. Continue right to pass underneath C-470 and turn east to stay on the C-470 Bikeway trail. Join the Columbine Trail after crossing Chatfield Ave. Take the trail north along Chatfield Ave. as it turns into S Platte Canyon Rd. After crossing Mineral Ave. take a right and join the Mineral Ave Trail, continue on and then connect back onto Mary Carter Greenway Trail. (Approx. 3.2 miles)
  • Eastern Detour: Follow the Highline Canal Trail east, then turn left on the trail before the Centennial trail begins and continue as it goes under County Line Rd. Then continue north on the Highline Canal Trail to the bike lane on Mineral Avenue. Take Mineral Ave. across Santa Fe Drive, then get on the Railroad Spur Trail back onto Mary Carter Greenway Trail. (Approx. 3 miles)

Lane Closure on Eastbound C-470

What: The right lane on eastbound C-470 will be closed from Yosemite off-ramp to I-25/E-470 ramps to perform wall construction, roadway widening, barrier setting and lane striping.

When: Beginning in late June for approximately ten weeks. Closure is 24/7.

Two lanes of C-470 will remain open between Yosemite and I-25/E-470. Motorists should be prepared for delays in this area.

24/7 Closures: Northbound Broadway Dedicated Right Turn Lane

Closure of northbound Broadway dedicated right turn onto eastbound C-470 on-ramp to perform ramp construction and concrete paving as part of the C-470 Express Lanes Project

24/7 for approximately three weeks starting April 30

Non-commercial vehicles will still be able to utilize the on-ramp and will turn right at the traffic light.

Commercial vehicle detour is approximately 2.23 miles long. Take northbound Broadway to County Line Road and turn right. Take County Line Road to University and turn right, then continue onto eastbound C-470 on-ramp. (See map.)

Eastbound C-470 Connector Ramp Closures

What: Eastbound C-470 ramps to north and southbound I-25 closed for work to place temporary pavement and set barrier.

When: Wednesday through Thursday, June 27 to June 28 10 p.m. until 5:30 a.m. and Saturday, June 30 12 a.m. to 8 a.m.


  • Northbound and southbound I-25 ramps to westbound C-470 Detour:
    Take northbound and southbound I-25 to northbound E-470 to Peoria Street exit. Take Peoria Street to southbound E-470 and continue onto westbound C-470. No tolls will be charged during closure.
  • Eastbound C-470 ramp to southbound I-25 detour:
    Take eastbound C-470 ramp to northbound I-25. Exit on Dry Creek Road, turn left and continue back onto southbound I-25.
  • Eastbound C-470 ramp to northbound I-25 detour:
    Take eastbound C-470 ramp to southbound I-25. Exit on Lincoln Avenue, turn left and continue back onto northbound I-25.

                                                                                       C-470 Nighttime Ramp Closures

Due to the nature of the construction work on the C-470 Express Lanes Project, nighttime ramp closures are required intermittently through the next few weeks.

Ramps Affected:
Quebec, University, Broadway, Lucent, Santa Fe and Wadsworth both westbound and eastbound

These closures are required for crews to stripe, place barrier, move equipment and other activities. Watch for detour signs and use caution. Detours will lead motorists to the next exit, where they can return to C-470 and to their destination. Detours are typically 2.5-3 miles long.

Colorado: The Official State Web Portal