Eastbound I-70 Peak Period Shoulder Lane


The project, part of CDOT’s comprehensive plan to improve travel in the I-70 Mountain Corridor, will upgrade 13-miles of Eastbound I-70 within CDOT’s existing right of way. The upgrades will create the I-70 Mountain Express Lane; a wide shoulder that – only during peak travel periods – will operate as a third travel lane. The I-70 Mountain Express Lane will be dynamically priced to keep traffic moving. Prices will lower when CDOT wants to encourage drivers to use the lane and rise as the lane reaches capacity. Click here for more information on how express lanes operate.

Utilizing the shoulder to create an express lane within the existing I-70 right-of-way during peak periods instead of adding a full lane has several benefits:

Project Benefits

  • Dynamic toll pricing keeps traffic moving: prices lower to encourage drivers to use the lane and rise as the lane reaches capacity
  • Reduces travel time by nearly half from the Eisenhower/Johnson Memorial Tunnels to the top of Floyd Hill, resulting in an average 30-minute time savings
  • Provides drivers with the choice of a new more reliable travel lane
  • Avoids overbuilding I-70, by using the shoulder as a third lane, during peak hours
  • Enhances recent Twin Tunnels (Veterans Memorial Tunnels) improvements
  • Allows for faster speeds in all lanes, thus decreasing overall travel time

Click here to view the weekly lane closure report.

Current construction activity:

There will be no construction-related lane closures on I-70 between the Empire Junction and Idaho Springs Saturday, May 23, through Monday, May 25, and there will be no closures in the eastbound direction on Tuesday, May 26, allowing drivers to return to town following the holiday weekend.

The SH-103 on-ramp to eastbound I-70 (interchange 240) will not be open for the Memorial Day holiday weekend. When the subgrade dries sufficiently this on-ramp will be re-graded and base course materials put down before the on-ramp is paved. Pending weather conditions, this work is currently scheduled to take place Wednesday, May 27, so the on-ramp can open on Thursday.

Once the SH-103 on-ramp to eastbound I-70 reopens, crews will put the pedestrian railings in place across the SH-103 bridge. This work will require overnight closures of I-70 beneath the bridge. Currently, the westbound lanes of I-70 are scheduled to be closed overnight Sunday, May 31, and the eastbound lanes of I-70 during the overnight hours Monday, June 1. During these overnight closures, I-70 traffic will be detoured around the work via the off- and on-ramps in the 240 interchange. 

The Dumont on-ramp to eastbound I-70 (interchange 235) is currently closed while crews build a retaining wall. This on-ramp will be closed for about a month, and during that time drivers will need to enter eastbound I-70 at Downieville (mile maker 234). Drivers can also use Stanley Road to travel east into Idaho Springs.

Work at the weigh-in-motion station near mile marker 233 is scheduled to begin the evening of Sunday, May 31. This work will require closing the right lane of eastbound I-70 starting the evening of May 31 and continuing until noon Friday, June 5. The lane would reopen for the weekend before closing again the evening of Sunday, June 7, and remaining closed until noon Friday, June 12. 

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How will the I-70 Mountain Express Lane Work?

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Fall 2015: Express Lane Closed

Fall 2015: Express Lane Open

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Stay Informed?



Click here to view the weekly lane closure report


Bilingual Project hotline: 303-223-6581


Have a question? Click here to contact the project team

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Project Contact

For more information, please contact:

Neil Ogden
CDOT Project Manager

Emily Wilfong
CDOT Communications Manager
303 757-9484

Planning a Trip?

Slower speeds in construction zones may temporarily delay travel times.  We want to make sure you have access to events, trails and towns that make Colorado great. Use the resources below to help you prepare:

  • Sign up for free email and text alerts with CDOT’s GovDelivery service
  • Call the project hotline (303-223-6581) to listen to the most recent lane closure report
  • Visit
Colorado: The Official State Web Portal