Eastbound I-70 Peak Period Shoulder Lane


Part of CDOT's comprehensive plan to improve travel in the I-70 Mountain Corridor, this project 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 fall when CDOT wants to encourage drivers to use the lane and increase as the lane reaches capacity. Learn more about how express lanes operate.

Using 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.

View the weekly lane closure report.

Project benefits

  • Dynamic toll pricing keeps traffic moving; prices fall 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

Current construction activity

Throughout June, there will be lane closures in various places so crews can close out the project with miscellaneous activities, including:

  • final slope grading and seeding;
  • removing old fiberoptic cables;
  • installing center median glare screen panels and signs;
  • patching asphalt; and
  • installing pedestrian rails.

In June, Water Wheel Park will also reopen to the public.

With traffic volumes expected to start increasing in June, the project will keep two lanes of travel open during peak travel times. This includes during the early morning hours for westbound travel and after 1 p.m. for eastbound travel. No westbound lane closures will be permitted on Fridays in June.

For long-term information on traffic conditions along the I-70 mountain corridor, travelers can sign up for text or email alerts, visit, call 511 or download the I-70 mobile application to their phones from the app store.

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


PhoneIconBilingual Project hotline: 303-223-6581 

Contact+InfoIconHave a question? Contact the project team.
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