Projects

C-470 Express Lanes


Project Facts

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

Mary Carter Greenway Trail Closures

The Mary Carter Greenway Trail will be closed intermittently under the South Platte River Bridge as crews replace the existing eastbound and westbound bridges.

  • Check this site for notification of closures.
  • Follow the posted detour signs.
  • The western detour is approximately 3.2 miles, which is 0.3 miles longer than original route.
    • Follow the Columbine Trail along Chatfield Avenue and Platte Canyon Road. Take the Mineral Trail along Mineral Avenue to connect back onto the Mary Carter Greenway Trail.
  • The eastern detour is approximately three miles, which is one mile shorter than original route.
    • Follow the Highline Canal Trail to Southpark Lane. Take the Mineral Avenue Trail. After crossing Santa Fe Drive, continue on the Railroad Spur Trail onto Mary Carter Greenway Trail.

Unless noted above, the trail will be open and available to use. While work is being performed under the South Platte River Bridges and when a full closure is not required, flaggers may be present to guide trail users safely through the work zone. Please be cautious and obey flagger instructions.

Updates

Concrete Paving
Concrete paving operations are expected to start in early October from Big Dry Creek to Quebec on eastbound C-470.

Frequent Nighttime Ramp Closures and Traffic Shifts
Travelers have been experiencing frequent nighttime ramp closures from 8 p.m. to 5:30 a.m. These closures are necessary for striping operations, maintenance, and setting of temporary barrier. The detours are usually approximately 3 miles round trip to the next exit and back. 

Areas between Quebec and Wadsworth have been restriped to shift the traffic alignment. Be sure to drive carefully through the construction zone and obey posted speed limit signs.

Reconstruction of the South Platte River Bridges and Widening of the Erickson Bridges
Work on the new eastbound South Platte River Bridge is well underway. Bridge foundations have been constructed. Concrete girders are expected to be set in early October with the bridge deck pour to follow. Because of the proximity to the Mary Carter Greenway Trail, flaggers have been placed to guide trail users through the construction zone when needed. The South Platte River bridges are the only bridges being fully reconstructed with the C-470 project.

The Erickson Bridge is the next bridge scheduled for widening and is expected to start in the fall.

University, Broadway and Big Dry Creek Bridges
Bridge widening work at University, Broadway, and Big Dry Creek have significantly progressed. Concrete has been poured on these bridge decks.

Wadsworth to Santa Fe
Activity between Wadsworth and Santa Fe continues to increase with the extension of the construction zone advanced warning signage, grading operations, Intelligent Transportation System (ITS) backbone conduit installation and preparation for replacement of the South Platte River Bridges. 

Lucent to Quebec
Construction continues between Lucent and Quebec including trail reconstruction, temporary barrier and restriping, earthwork and drainage operations, detour paving, retaining wall construction, and ITS work along the outside shoulders of east and westbound C-470. 


Photo of the Week

Noise wall panels along westbound C-470 ready to be installed near Broadway.


Lane Closures

  • Monday (10/16) – Friday (10/20) 8:30 a.m. – 3:30 p.m. – Northbound and Southbound Erickson right and left lane closures for bridge construction prep work; northbound and southbound Lucent alternating right and left single lane closures for ITS potholing and boring; northbound and southbound Acres Green right and left lane closures for bridge construction.

  • Monday (10/16) – Friday (10/20) 9 a.m. – 3 p.m. – Eastbound and westbound C-470 University partial on-ramp closures for temporary ramp widening and ITS work; eastbound and westbound Lucent, Broadway and University partial off-ramp closures for ITS and electrical work.

  • Monday (10/16) – Friday (10/20) 9 a.m. – 3:30 p.m. – Northbound Broadway left lane closure for bridge construction, westbound C-470 Broadway partial on-ramp left lane closure for temporary ramp widening and ITS work.

  • Sunday (10/15) – Friday (10/20) 7 p.m. – 5 a.m. – Eastbound Broadway partial on-ramp left lane closures for temporary ramp widening and ITS work.

  • Sunday (10/15) – Saturday (10/21) 7 p.m. – 5:30 a.m. – Eastbound Lucent on-ramp full closure for temporary ramp widening and ITS work.

  • Sunday (10/15) and Saturday (10/21) 9 p.m. – 5:30 a.m. – Westbound Broadway off-ramp full closure for temporary ramp widening.**

  • Sunday (10/15) – Friday (10/20) 10 p.m. – 5:30 a.m. – Eastbound alternating right and left single lane closures for median widening earthwork, setting temporary barrier and bridge construction.

  • Monday (10/16) – Tuesday (10/17) 7 p.m. – 5 a.m. – Southbound University left lane closure for bridge construction; Southbound and northbound University and Broadway alternating double left and right lanes with sidewalk closures for bridge construction and ITS work.

  • Monday (10/16) – Saturday (10/21) 7 p.m. – 5:30 a.m. – Eastbound C-470 alternating right and left single lanes for setting temporary barrier, median prep and equipment mobilization.

  • Monday (10/16) –Friday (10/20) 8 p.m. – 5 a.m. – Eastbound and Westbound Quebec on-and-off ramp full closures for temporary ramp widening; Eastbound University on-ramp full closure for temporary ramp widening**

  • Monday (10/16) – Friday (10/20) 8 p.m. - 5:30 a.m. – Westbound Broadway off-ramp full closure for temporary ramp widening**; westbound C470 alternating right and left single lanes for setting temporary barrier and median prep.

  • Monday (10/16) – Friday (10/20) 9 p.m. – 5:30 a.m. – Eastbound Broadway on-ramp full closure for temporary ramp widening**

  • Monday (10/16) – Friday (10/20) 10 p.m. – 5:30 a.m. – Westbound Santa Fe off-ramp full closure for Erickson Bridge access traffic switch; Westbound C-470 alternating right and left single lane closures for median widening earthwork, setting temporary barrier and bridge construction.**

  • Monday (10/16) – Friday (10/20) 10 p.m. – 6 a.m. – Northbound and southbound Acres Green right and left lane closures for bridge construction.

  • Saturday (10/21) 8 p.m. – 8 a.m. – Alternating right and left single lane closures on east and westbound C-470 for setting temporary barrier and median prep, earthwork, and bridge construction.

Note: The traffic control supervisor determines if closures need to be adjusted to provide a safe method of handling traffic conditions if curves, hills, etc., are present. *All lane closures are weather dependent. **Be sure to follow posted detour signs during ramp full closures.


See a brief overview of the April 2017 open house.


Project Overview

The C-470 Express Lanes project will increase mobility and user choice along 12.5 miles of C-470 between I-25 and Wadsworth Boulevard. The $276 million project includes the following improvements:

  • Mobility Improvements:
    • Two additional westbound Express Lanes constructed from I-25 to Colorado Boulevard, and one additional Express Lane from Colorado Boulevard to Wadsworth.
    • One additional eastbound Express Lane constructed along the length of the project, between I-25 and Wadsworth Boulevard.
  • Additional safety and infrastructure improvements:
    • full reconstruction of existing pavement
    • new auxiliary lanes at selected locations
    • on- and off-ramp improvements
    • realignment of substandard curves
    • widening of existing bridges
    • replacing the bridges over the South Platte River

Funding

The project is funded by $110.6 million in combined state and federal funding, and $10 million from Douglas County. The remainder will be funded via a loan repaid by toll revenues from the Express Lanes.


About Express Lanes

The C-470 Express Lanes project will add Express Lanes in addition to the existing, free general-purpose lanes. Drivers will always have a choice of using the free existing lanes or paying a toll to use the Express Lane.

There will be no HOV/carpool lanes within the C-470 corridor.

Express Lanes increase roadway capacity and help to manage congestion on highways. The use of toll pricing during peak travel times reduces delays, manages congestion and maintains reliable travel times. Express Lanes are currently open on:

For more information, visit CDOT's Express Lanes website

You can also find lane closure information any time.

Contact Us
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