C-470 Express Lanes

Project Facts

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

The C-470 Express Lanes project includes:

  • adding two westbound Express Lanes from I-25 to Colorado Boulevard, and adding one westbound Express Lane from Colorado Boulevard to Wadsworth Boulevard
  • adding one eastbound Express Lane from just west of the South Platte River to I-25;
  • fully reconstructing a portion of the existing pavement;
  • adding auxiliary lanes;
  • improving portions of on- and off-ramps to current standards (including ramp metering where appropriate);
  • realigning substandard curves;
  • making safety and operational improvements between I-25 and Quebec via direct-connect ramps from I-25 to the westbound C-470 Express Lanes;
  • widening existing bridges throughout the project area;
  • replacing the bridges over the South Platte River;
  • installing water-quality features where required;
  • installing noise barriers where required;
  • installing Intelligent Transportation Systems elements and tolling equipment; and
  • adding grade separations for the multi-use trail at Quebec and Colorado.

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 is complete; currently the Mary Carter Greenway Trail at the S Platte River is open. Occasionally flaggers will be posted in that area to guide users through the area when work is occurring.

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 is complete for the new westbound to westbound flyover bridge; bridge girder set has begun.

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.

Eastbound Ramp Full Closures

What: As part of the C-470 Express Lanes project, crews will conduct full closures of the eastbound C-470 ramps to northbound and southbound I-25 to perform wall and roadway construction.

When: Monday, July 23 through Wednesday, July 25 from 10 p.m. to 5:30 a.m.

Detour: Eastbound C-470 to north and southbound I-25 detour: Continue eastbound on C-470 until it becomes northbound E-470. Exit Peoria St. and take Peoria St. to southbound E-470 on-ramp then continue to the northbound and southbound I-25 ramps. No tolls will be charged during this closure.

Broadway Turn Lane Full Closure

What: The westbound C-470 off-ramp dedicated right turn lane onto northbound Broadway will have a full closure for paving, ramp widening construction and drainage installation.

When: Thursday, July 19 for approximately six weeks. Closure is 24/7.

Vehicles will turn right at the traffic light. See map below.

Full Freeway Closure Eastbound C-470

What: Full freeway closure of eastbound C-470 from Quebec to I-25/E-470 to perform drainage work and pipe installation.

When: Friday, July 20 from 11 p.m. to 8 a.m.


Eastbound C-470 to southbound and northbound I-25 detour

Take eastbound C-470 to the Quebec St. off-ramp. Turn left onto Quebec St., to County Line Rd., and turn right onto County Line Rd. to northbound/southbound I-25 on-ramps.

Eastbound C-470 to northbound E-470 detour:

Take eastbound C-470 to the Quebec St. off-ramp. Turn left onto Quebec St. to County Line Rd., and turn right. Take County Line to Inverness Parkway. Take Inverness Pkwy. to Jamaica St., and turn left onto Jamaica St. to northbound E-470 on-ramp. (See map below.)

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, drainage installation and lane striping.

When: Beginning July 3rd, for approximately  ten weeks, right lane closure will be in place 24/7.

Two lanes of C-470 will remain open between Yosemite and I-25/E-470. Far right lane is now the exit lane to Yosemite. 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.)

Full Closure of SB and NB I-25 Ramps to WB C-470

 What: Crews will conduct full closures of southbound and northbound I-25 ramps to westbound C-470 for bridge work.

When: Sunday, July 8 through Thursday, July 12 from 10 p.m. to 5:30 a.m., July 14 from as 12:00 a.m. to 8:00 a.m. as well as Sunday, July 15 through Wednesday, July 18 from 10 p.m. to 5:30 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 this closure.

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