C-470 Express Lanes

Project Facts

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

Wadsworth to Santa Fe:

  • Traffic has been shifted onto new permanent concrete pavement and the newly constructed South Platte River Bridge eastbound between Wadsworth and Santa Fe.
  • Demolition of the old eastbound South Platte River bridge is complete.
  • Currently, the Mary Carter Greenway Trail at the South Platte River is open. Occasionally flaggers will post in that area to guide users when work is occurring.
  • Work on the north side of the eastbound South Platte River bridge and noise wall construction are on-going.
  • Demolition of the westbound South Platte River bridge will begin soon.

Santa Fe to Lucent:
Work includes:

  • drainage installation;
  • noise wall construction;
  • continued work on the Erickson bridge; and
  • concrete paving;

Lucent to Quebec:

  • Eastbound traffic has been shifted onto new permanent concrete pavement between Lucent and Quebec.
  • Concrete paving is on-going.
  • Subgrade treatment is taking place.
  • Crews will complete concrete barrier, guardrail and overhead sign installation, and drainage work.
  • Crews will do ITS work (light poles and tolling infrastructure in median).
  • Expect approach slab work at the Big Dry Creek bridge, and trail paving.

Quebec to I-25:
Work includes

  • earthwork;
  • drainage pond grading and pipe installation;
  • ITS;
  • bridge, retaining wall and drainage work at Yosemite and Acres Green;
  • Willow Creek trail now open;
  • permanent barrier installation;
  • temporary asphalt paving in median and I-25 interchange;
  • installation of overhead signs;
  • trail paving; and
  • bridge column/abutment construction, girder set and bridge deck pour complete for new direct connect bridge near I-25 to westbound C-470;
  • Traffic shift on eastbound C-470 to open third lane between Yosemite off-ramp and I-25 complete.

Lane Closures

  • To complete bridge work, the southbound and northbound I-25 ramps to westbound C-470 will be closed on the following dates:  Saturday, March 16 from 12 a.m. to 8 a.m. and Monday, March 11 through Thursday, March 14 from 10 p.m. to 5: 30 a.m. Detour: Take northbound and southbound I-25 to northbound E-470 to the Peoria exit. Take Peoria to southbound E-470 and continue onto westbound C-470. No tolls will be charged during closure.
  • Monday, March 18 from 10 p.m. to 5:30 a.m. eastbound C-470 at Broadway will be closed to install permanent overhead sign structures. There is no detour for this closure. Motorists will simply exit the eastbound Broadway off-ramp, continue through the traffic signal and proceed onto the eastbound Broadway on-ramp.
  • Tuesday, March 19 through Thursday, March 21 from 10 p.m. to 5:30 a.m. eastbound C-470 from University to Quebec will be closed to install permanent overhead signs. Detour: Exit University eastbound off-ramp. Turn left onto northbound University, proceed to County Line Rd. and turn right. Continue on County Line Rd. to Quebec St. Turn right onto southbound Quebec St., then turn left onto eastbound C-470 on-ramp.

Trail Closure Alert

  • Northbound and southbound Mary Carter Trail be closed intermittently at the C-470 underpass beginning in March for approximately 8 weeks for bridge demolition work. Trail users intending to continue through the C-470 underpass must detour beginning at Mineral Ave. All others will be able to use the Mary Carter Trail from Mineral Ave. just before the C-470 underpass.

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 the Mary Cary Trail.

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 Ave. Take Mineral Ave. across Santa Fe Dr., then get on the Railroad Spur Trail back onto Mary Carter Trail.

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