During spring 2021, single lane closures along the westbound I-70 mountain corridor between the Veterans Memorial Tunnels (Mile Point 242) and US 40/Empire Interchange (Mile Point 232) will be restricted to overnight hours.

Drivers should still plan for delays during the ski season and are advised to check before traveling. 

There will be one day each week (typically Wednesdays) when there are short-term, mobile lane closures along the corridor between 7 a.m. and 5 p.m. as trucks slowly move through and clean off camera lenses and other Express Lane devices.

Travel alert WB I-70 in Idaho Springs

Construction update for the week of April 18 through April 24, 2021:

Crews will begin a series of off-ramp reconstructions this week starting with the westbound I-70 off-ramp to Exit 240 (CO 103/Mt. Evans Road) in Idaho Springs. This off-ramp will be closed all week and once work on this ramp is complete, similar work will be done in upcoming weeks at the westbound off-ramps to Exit 239 and 235.

Daytime work will occur this week in the shoulder areas of both directions of I-70 to clean culverts and load out barrier. During overnight hours there will be single lane closures and mobile closures in various places between Mile Points 243 (Central City Parkway) and 232 (US 40/Empire interchange) while crews replace barrier, install signs, slip form new sign caissons, and install new fiber optic media converters for the managed toll system.

The following traffic impacts are anticipated:

  • Sunday, April 18, to Friday, April 23: The westbound I-70 off-ramp to Exit 240 will close at 11 p.m. Sunday and remain closed until 5 a.m. Friday for reconstruction. Drivers should use Exits 241 or 239 in Idaho Springs.
  • Sunday, April 18: There will be mobile lane closures along westbound I-70 between Mile Points 243 and 232 starting at 3 p.m. and continuing until 5 a.m. Monday.
  • Overnight Sunday, April 18: The right lane of westbound I-70 will be closed between Mile Points 241 (Colorado Boulevard) and 238 (Fall River Road) from 7 p.m. to 5 a.m. to set temporary barrier.
  • Overnight Monday, April 19, through Thursday, April 22: The eastbound I-70 Mountain Express Lane and left lane of eastbound I-70 will be closed between Mile Points 235 (Dumont) and 240 (CO 103/Mt. Evans Road) from 8 p.m. to 5 a.m. each night for guardrail work.
  • Work on the sound wall at Exit 239 in Idaho Springs has resumed. Miner Street at 1st Avenue is narrowed.
  • The eastbound I-70 Mountain Express Lane will be closed intermittently Monday through Thursday from 7 a.m. to 5 p.m. and Friday from 7 a.m. to noon.
  • The Wagon Wheel Trail remains closed. No pedestrian or cyclist access is permitted.
  • All construction schedules are weather dependent and subject to change.
  • Please refer to  for exact closures when planning your trips.

Temporary parking restrictions in Idaho Springs lots


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Project Background

I-70 Mountain Proposed Improvements

 The construction phase of this project includes building the shoulder Express Lane, drainage improvements, building retaining walls, and installing a fiber-optic network and electronic signage and tolling system. Construction will be complete and the Mountain Express Lane opened for testing in spring or summer 2021. Tolls will be waived until later in 2021.

Project Benefits

  • Driver Choice –In keeping with CDOT’s new Whole System – Whole Safety initiative, the new Express Lane will provide westbound drivers with a safer and more reliable choice during peak travel times.
  • Improved Infrastructure – The addition of an Express Lane along westbound I-70 is a much-needed improvement to the area’s infrastructure in support of economic growth. 
  • Driver Safety – Safety barriers, guardrails, and end caps are in place along the construction zone from Exit 235 to Exit 231. These safety measures will be implemented during all phases of civil construction.
  • Advanced Technology – The construction of a westbound Express Lane and retaining walls is incorporating leading-edge technologies and materials to maximize driver safety. The installation of fiber optics, new electronic signage and a tolling system will achieve CDOT’s goal of a safer, more connected and mobile I-70 mountain corridor.

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