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Reconnecting Communities

Central 70 between I-25 and Chambers Road, is one of Colorado's economic backbones. It is home to 1,200 businesses, providing the regional connection to Denver International Airport and carrying upwards of 200,000 vehicles per day. The Colorado Department of Transportation (CDOT) is bringing this aging highway into the 21st century and rejoining communities along the way.

Project Updates

General Description of Construction Activities for the Week

Crews will conduct locates for current utilities to assist design and survey. Crews will also continue soil testing to determine how it can be reused on the project. Roads will be stripped this week. Detour signage will be installed.

Crews will perform bridge inspections, repair guardrail, and install advanced warning signage on I-70 overnight throughout the week. This will cause brief and intermittent lane restrictions. Advanced warning signage will be installed overnight on I-25 and I-270 at the I-70 interchanges.

Construction activities are weather and site-condition dependent and schedules are subject to change.

  • To receive construction updates on your phone, text Central 70 to 77948
  • The Central 70 Project office is located north of I-70 at Steele/Vasquez. Please watch for crews entering and exiting the work area.

West Travel Impacts (Brighton Boulevard to Colorado Boulevard)


  • Sept. 9 - 10 p.m.-5:30 a.m.
  • Eastbound and westbound I-70 between Brighton and Colorado boulevards: brief and intermittent right or left lane restrictions. 
  • Sept. 14 - 10 p.m.-5:30 a.m.
  • Westbound I-70 between 46th Avenue & Colorado Boulevard: right lane restriction.
  • Sept. 15 - 8 p.m.-5:30 a.m.
  • Westbound I-70 between Steele Street on-ramp to wesbound I-70 & Brighton Boulevard off-ramp: brief and intermittent right or left lane restrictions.
  • Sept. 15 - 8 p.m.-5 a.m.
  • Eastbound I-70 between Brighton Boulevard on-ramp to eastbound I-70 & York Street off-ramp: brief and intermittent right or left lane restrictions.

Local Streets

  • Sept. 9 - 8:30 a.m.-3:30 p.m.
  • Intersection at 47th Avenue & Josephine Street: right and left lane restrictions. Download the detour map.
  • Sept. 10 & 11 - 9 a.m.-2 p.m.
  • Fillmore Street, north of North Vasquez Boulevard: brief and intermittent lane restrictions.
  • Sept. 10-14 - Daily 7 a.m.-5:30 p.m.
  • Northbound Brighton Boulevard between 44th Street and I-70: right lane restriction.
  • Sept. 10-14 - Daily 8:30 a.m. - 3:30 p.m. 
  • Steele Street between 45th & 48th avenues: right and left lane restrictions. Watch for detour signage. Use Colorado Boulevard as an alternate route.
  • 47th & Williams Street: rigth lane restrictions
  • Sept. 12 - 9 a.m.-2p.m.
    Vine & Gaylord streets, from 47th Avenue to the local frontage road
    - Race & High streets, from 47th Avenue to the local frontage road
  • Sept. 13 & 14 - 10 p.m.-5:30 a.m
  • Eastbound 46th Avenue at Jackson Street intersection: right lane restriction
  • Sept. 15 - 7 p.m.-5 a.m.
  • Westbound 46th Avenue between Josephine & York streets: right or left lane restrictions
  • Eastbound 46th Avenue between Brighton Boulevard & Baldwin Court: right lane restriction.

Central (Colorado Boulevard to Quebec Street) and East (Quebec Street to Tower Road) Travel Impacts

Week of September 16

Soil testing will continue on I-70 and 46th Avenue. Expect overnight lane
restrictions on I-70 in the east segment to prepare for lane shifts. The permanent closure of 46th Avenue between Brighton Boulevard and York Street will begin. The local/frontage road between High Street and East 46th Avenue will permanently close. Visit the Project website to learn more.

Upcoming work

Several construction activities will begin as soon as Sept. 16

  • 46th Avenue between Brighton Boulevard and York Street will close to begin construction on the Union Pacific Railroad bridge
  • The local road between High Street and East 46th Avenue (just north of I-70) will close for utility installation, roadway construction and property demolition
  • Lanes will shift on eastbound and westbound I-70 in the east segment between Peoria Street and I-225


There is currently a lot of construction activity in north Denver. Visit the NAVIGATE - North Denver page for updated information on available routes, detours, and road closures.


Project Background

After more than ten years of extensive study, the CDOT recommended to the I-70 East Environmental Impact Statement the partial cover lowered option as preferred alternative, which was developed with community input and has broad public support.

The purpose of the project is to implement a transportation solution that improves safety, access, and mobility and addresses congestion on I-70.  The need for this project results from the following issues:

  • Increased transportation demand
  • Limited transportation capacity
  • Safety concerns
  • Transportation infrastructure deficiencies


The CDOT has made a number of commitments to the local community as part of the Central 70 Project, and is working alongside the city to uphold and implement them. The commitments cover a range of issues, from mitigating the impacts of construction noise and dust to contibuting to affordable housing and fresh food access.

The Central 70 Project seeks to bring a number of improvements that include:

  • Complete reconstruction of I-70 from Brighton Boulevard to I-270, including the addition of one Express Lane in each direction
  • Removal of the 50 year-old viaduct and lowering the interstate between Brighton and Colorado boulevards
  • Widening I-70 from I-270 to Chambers Road to accomodate one Express Lane in each direction
  • Restriping I-70 from I-25 to Brighton Boulevard to accomodate one Express Lane in each direction


Project Timeline

  • 2003: CDOT starts studying a series of improvements to this corridor to make the interstate safer, relieve congestion, and address aging infrastructure
  • 2006: the highway and transit elements of the I-70 East corridor were separated into two independent studies
  • 2008: CDOT publishes a draft of the EIS, no preferred alternative identified
  • 2010: the Preferred Alternative Collaborative Team (PACT) was formed consisting of 26 stakeholders representing federal and state agencies, local governments, and community and businesses interests

  • 2012-2013: CDOT introduces the concept of building a park over I-70 along with the partial lowered alternative
  • 2013: in April, the project team held public meetings attended by more than 400 people, during which the community urged CDOT to move forward with the PCL alternative
  • 2014: the Supplemental Draft EIS is published and identifies a preliminary preferred alternative. The document received 900 comment submittals. In October, the City and County of Denver and a coalition of regional leaders confirmed their support of the Partial Cover Lowered preferred option for I-70
  • 2016: in January, CDOT released the Final Environmental Impact Statement, which compiles the results of more than 10 years of study. The release was followed by a 45-day public review period and two public hearings to complete the study process. Later in the year, CDOT held three public workshops to shape the final design concept for the park cover


  • January: the Federal Highway Administration approved the Record of Decision (ROD), allowing the project to move forward. The ROD is available online.
  • August: CDOT selects Kiewit Meridiam Partners to design, build, finance, operate and maintain the project
  • August - September: CDOT and the City and County of Denver enter a partnership to implement mitigation and home improvements to 268 homes located within the project's mitigation boundary


Construction is expected to start in summer 2018