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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 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. Westbound traffic has been diverted onto the new eastbound bridge as well while crews construct the new westbound South Platte River Bridge.
  • Demolition of the old westbound South Platte River bridge is complete.
  • Currently, the Mary Carter Greenway Trail at the South Platte River is closed while construction of the new westbound bridge continues. Planned trail reopening date is May 24, 2019.
  • Noise wall, drainage, wall and grading work along westbound C-470 between Santa Fe and Wadsworth is on-going.

Santa Fe to Lucent:
Work includes:

  • inlet, lighting and barrier;
  • noise wall construction;
  • continued work on the Erickson bridge; and
  • concrete paving;

Lucent to Quebec:

  • Eastbound and westbound traffic has been shifted onto new permanent concrete pavement between Lucent and Quebec.
  • Concrete paving is on-going.
  • Crews will complete concrete barrier, guardrail, overhead sign installation, and drainage work.
  • Crews will do ITS work (light poles and tolling infrastructure in median).
  • Expect trail work at Colorado and Quebec.

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;
  • bridge construction;
  • More traffic shifts can be expected to move traffic onto new permanent concrete pavement.

Lane Closures

  • Monday, May 13 and Tuesday, May 14 from 10 p.m. to 5:30 a.m. westbound C-470 from Broadway to Lucent will be closed for overhead sign installations. To Detour: North: Exit Broadway westbound off-ramp. Turn right onto northbound Broadway, proceed north to County Line Rd. and turn left. Continue on County Line Rd. until Lucent Blvd. Turn left onto south Lucent Blvd., then continue to the westbound C-470 on-ramp. South: Exit Broadway westbound off-ramp. Turn left onto southbound Broadway, proceed south to Plaza Dr. and turn right. Continue on Plaza Dr. until Lucent Blvd. Turn right onto north Lucent Blvd., then continue to the westbound C-470 ramp.

  • FULL WEEKEND CLOSURE of westbound Quebec on-ramp

Beginning Friday, May 17 at 8:00 p.m. until Monday, May 20 at 5:30 a.m. the westbound Quebec on-ramp will be closed. This closure is necessary to remove existing asphalt, excavate the existing ramp, place an 18-foot box culvert and rebuild the ramp allowing Centennial Trail users to seamlessly access the C-470 Trail. This underpass will not only enhance connectivity of the trail but provide safe passage for users by eliminating the need to interact with traffic on Quebec Street.

Northbound Detour: Continue north on Quebec St. to County Line Rd. and turn left. Take County Line Rd. west to University Blvd. and turn left. Continue south on University Blvd. to the westbound C-470 on-ramp.

Southbound Detour: Continue south on Quebec St. to University Blvd. and turn right. Take University Blvd. north to westbound C-470 on-ramp.

Monday, May 20 through Thursday, May 23 from 10 p.m. to 5:30 a.m. eastbound C-470 at Lucent Blvd. will be closed to install overhead sign structures. To Detour: Exit eastbound C-470 at the Lucent off-ramp. Continue through the traffic signal onto the eastbound C-470 via the Lucent on-ramp.

Monday, May 20 through Thursday, May 23 from 10 p.m. to 5:30 a.m. and Sunday, May 25 from 12 a.m. to 8 a.m. the southbound and northbound I-25 ramps and southbound E-470 ramp to westbound C-470 will be closed to perform grading operations, paving and to switch traffic onto new permanent pavement. SB E-470 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 I-25 Detour: Take 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. NB I-25 Detour: Take northbound I-25 and exit onto County Line Rd. west. Continue on County Line Rd. west to Yosemite St. and turn left. Take Yosemite St. south to the westbound C-470 on-ramp.

Wednesday, May 22 and Thursday, May 23 from 10 p.m. to 5:30 a.m. eastbound C-470 from Broadway to University will be closed to install overhead sign structures. Detour: Exit Broadway eastbound off-ramp. Turn left onto northbound Broadway, proceed north to County Line Rd. and turn right. Continue on County Line Rd. to University Blvd. Turn right onto south University Blvd., then continue to the eastbound C-470 on-ramp.

Trail Closure Alert

  • Northbound and southbound Mary Carter Trail is closed at the C-470 underpass until May 24, 2019 for bridge construction. 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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