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:

Starting Saturday, Oct. 31, there will be various daytime lane closures between Georgetown and Idaho Springs each Saturday until the Thanksgiving holiday so crews can perform various work activities in preparation for opening the eastbound express lane in mid-December.

Crews will be installing static signs, putting up poles and installing the fiberoptic lines needed to operate the electronic message boards along the express lane corridor.

Weekday milling and paving operations along eastbound I-70 will also continue into November.  Crews will be working between the hours of 6 a.m. and 6 p.m. Monday through Thursday and 6 a.m. to 2 p.m. on Fridays.

These paving operations are focused between mile points 239 and 242 in Idaho Springs. Drivers can expect single lane closures and daytime travel delays through this area.

Beyond these paving operations, anyone traveling east on I-70 through Clear Creek County on weekdays should plan for up to 30 minute delays between the hours of 8 a.m. and 3 p.m. Westbound drivers should plan for up to 30 minute delays weekdays between the hours of 10 a.m. and 5 p.m.

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How will the I-70 Mountain Express Lane Work?

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Fall 2015: Express Lane Closed

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Fall 2015: Express Lane Open

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
303 512-5955

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