Night Work: Night work is required for some phases of construction due to safety concerns for the traveling public and for workers, and/or due to local jurisdiction restrictions for intermittent road closures required to complete the work. We will try to limit night work as much as possible.

Arapahoe Road Closed Underneath E-470: On Saturday, February 18, from 6 a.m. – 5 p.m., Arapahoe Road will be closed in order to pour the concrete deck for the E-470 bridge above Arapahoe Road. Detours will be clearly marked.

Quincy Road Full Night Closures: E-470 bridge construction will necessitate full overnight closures of Quincy Avenue at E-470 on March 9 and 16. Closures will begin each night at 8:00 p.m. and end no later than 5:00 a.m. the next day. Traffic will be detoured via Picadilly Road, Hampden Avenue and Gun Club Road.

All work and schedules are subject to change due to weather and/or other unforeseen conditions. We will update the schedules weekly with any changes.

Buffering Elements Update: On Thursday, December 8, The E-470 Board of Directors approved the buffering elements planned for this project. Click here to view the location map for the planned buffering elements. Click here to view the proposed wall designs.

Click here for the construction schedule for the next five weeks. 

We will also be sharing construction and closure updates via our Twitter handles @E470 or @E470RoadUpdates.



E-470 has seen tremendous traffic growth along the corridor, causing the need to evaluate the capacity of the road. The traffic along an eight-mile stretch between Parker Road and Quincy Avenue has increased approximately 13 percent each year for the last three years. E-470's 2014 full investment grade Traffic and Revenue Study indicated that this section of the road would need to be widened by 2018 in order to continue operating at the service level we require. We are moving forward with this project to ensure that we continue providing a safe and reliable commute for our customers.

Click here to view the results of the 2014 Traffic and Revenue Study.

E-470 will begin construction this spring to add a third lane to the road in each direction between Parker Road and Quincy Avenue. The new lanes ensure that we can continue to provide safety and value to our customers who choose to use the road.  In addition to the widening of the road from two to three lanes, the project will also include a multi-purpose pedestrian and bike trail along that segment of road.


• E-470’s widening project is entirely self-funded (about $90+ million) Google Map-SM.jpg

• The widening project also includes the multi-purpose pedestrian trail

• The project will begin in the spring of 2016 and last about 20 months

• Construction will take place on two-mile segments at a time

• T​wo lanes will remain open in each direction during weekday rush hours

• A concrete barrier will separate the driving public from construction

• Speeds will be slightly reduced through construction zones for safety

• Eleven bridges will be widened to accommodate the additional lanes

• Buffering elements will be added to the scope of the project

• The Interchange at Quincy Avenue is undergoing a traffic signal analysis

• Deer fencing in this area will be reinstalled once the project is done​

1-Parker Road to Cottonwoo​d Drive
2-Cottonwood Drive to Antelope Creek
3-Ireland Way to Gartrell Road
4-Gartrell Road to Smoky Hill Road
5-Smoky Hill Road Interchange
6-Quincy Avenue Interchange
Cross Sections
Design and Construction Schedule
Phasing Plan and Cross Sections
Roadway Level of Service

Click here for facts about the project.
Click here​ for our project Q & A document.
Click here for conceptual renderings of buffering options

Have questions or comments about the E-470 Road Widening Project? We welcome feedback from our neighbors. Comments will be reviewed by 
E-470 staff and shared with the Board of Directors. Click here to fill out the Comment Card. Email your completed card to jcarson@e-470.com. Please also submit a Comment Card if you would like to be included on our Road Widening Project email distribution list. Signing up for this list will 
allow you to receive periodic project updates.