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. Work on the westbound South Platte River bridge abutment is occurring with girders expected to be set in September.

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

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; ITS (light poles and tolling infrastructure in median); bridge deck repair at Broadway and University; approach slab work at the Big Dry Creek bridge; trail paving.

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; bridge rehab at Acres Green; approach slab work at Yosemite; bridge column/abutment construction; girder set and bridge deck pour in near future.

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

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.

8 p.m. - 8 a.m. Saturday and Sunday:
Alternating right- and left-lane closures on eastbound and westbound C-470.

Nightly Ramp Closures 8/12/18 - 8/18/18

  • Sunday - Wadsworth eastbound on-ramp
  • Sunday and Monday - Santa Fe eastbound off-ramp
  • Saturday and Sunday - Quebec WB on-ramp
  • Sunday, Monday and Thursday - University eastbound on-ramp
  • Monday through Friday - University eastbound off-ramp
  • Tuesday, Wednesday and Friday - Broadway westbound off-ramp
  • Tuesday through Saturday - Santa Fe westbound off-ramp
  • Saturday - Quebec EB off-ramp

Follow posted detour signs. Construction activities area weather dependent and schedule is subject to change.

 Westbound Full Freeway Closure E-470 to Yosemite

What: As part of the C-470 Express Lanes project, crews will close westbound C-470 from E-470 to Yosemite St. During these closures, northbound and southbound I-25 ramps to westbound C-470 will remain open. These closures are necessary to pave a single lane median section for the E-470 to westbound express lane bridge.

When: Sunday, August 19 through Thursday, August 23 from 10 p.m. to 5:30 a.m. as well as  Friday, August 24 and Saturday, August 25 12:00 a.m to 8:00 a.m.

Detour: Take southbound E-470 to southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. west to Yosemite St. and

turn right. Take Yosemite St. north to the westbound C-470 on-ramp.

SB Lucent Dedicated Right Turn Closure to WB C-470

What: The dedicated right-hand turn from southbound Lucent Blvd onto westbound C-470 will have a full closure for paving, ramp widening construction and drainage installation.

When: Beginning mid-August for approximately six weeks. Closure is 24/7.

Vehicles will turn right at the traffic signal. See map, below.

Turn Lane Closure at University

What: The dedicated right-hand turn from southbound University Blvd onto westbound C-470 will have a full closure for paving, ramp widening construction and drainage installation.

When: Beginning in mid-August for approximately six weeks. Closure is 24/7.

Non-commercial vehicles will turn right at the traffic signal.

Truck Detour: Commercial vehicles will continue through the traffic signal at the westbound C-470 on-ramp. Continue south to Dad Clark Dr and turn right. Take Dad Clark Dr approximately 2 miles to Broadway. Turn right on Broadway and continue to westbound C-470 on-ramp. (Detour is approximately 2.23 miles.)

Highline Canal Trail Closure

What: There will be a full closure of northbound and southbound Highline Canal Trail C-470 Underpass. This closure will be utilized to create a safe work zone for wall construction.

When: Beginning the morning of Aug. 8 and continuing for approximately three months The trail will be closed 24/7.


  • Northbound Highline Canal Trail underpass detour (approximately 0.8 miles):
    1. Take Plaza Drive west toward Erickson Boulevard.
    2. At Erickson Boulevard turn right, continue north to County Line Road, and turn right.
    3. Proceed west on County Line Road to Primo Road and turn right.
    4. Take Primo Road to Highline Canal Trail and proceed north.
  • Southbound Highline Canal Trail underpass detour (approximately 0.8 miles):
    1. Take Primo Road north to County Line Road and turn left.
    2. Proceed on County Line Road west to Erickson Boulevard and turn left.
    3. Proceed south on Erickson Boulevard to Plaza Drive, turn left onto Plaza Drive, and continue to Highline Canal Trail south.

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.

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 3 for approximately 10 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. The far-right lane is now the exit lane to Yosemite. Motorists should be prepared for delays in this area.

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