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:

The evening of Monday, Aug. 31, I-70 will be reduced to one lane of travel in each direction and detoured up and over the highway at Exit 241 in east Idaho Springs so crews can set the girders for the new bridge. Click here to see a map of these detour routes. Westbound I-70 will be taken down to one lane of travel on the east side of the Veterans Memorial Tunnels at 5 p.m. and eastbound will be reduced to one lane of travel near mile marker 240 starting at 6 p.m.

Crews are scheduled to have all lanes of I-70 open by 7 a.m. Tuesday, but the eastbound lane could open a little later. If needed, a similar detour will be in place the night of Tuesday, Sept. 1, to finish the work. When crews pour the concrete bridge deck this fall, a similar detour will be in place for both directions of I-70.

Overnight milling and paving activities continue along the eastbound lanes of I-70 between mile markers 232 and 241 on Sunday through Thursday nights. This work will involve the following on-ramp and off-ramp closures along eastbound I-70:

  • The Fall River Road on-ramp to eastbound I-70 (Exit 238) will be closed overnight Sunday, Aug. 30, through Tuesday, Sept. 1. The ramp is scheduled to close at 9 p.m. Sunday and 7 p.m. Monday and Tuesday. This on-ramp will reopen between 8 and 10 a.m. the following morning.
  • In late August or early September there will be overnight closures of both the eastbound I-70 off-ramp to US 40 (Exit 232) and the US 40 on-ramp to eastbound I-70.
  • After the Labor Day holiday, the eastbound I-70 off-ramp to Exit 239 will be closed during the overnight hours for widening work. 
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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