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Road Widening Projects

Next Phase to Begin in 2022

In 2021, the E-470 Public Highway Authority widened the roadway from Quincy Avenue to I-70, adding a third travel lane in each direction to help move more people in this growing part of the region. The project also included a six-mile extension of the High Plains Trail with a new 10-foot-wide concrete path to provide a better connection for pedestrians and people on bikes in Arapahoe and neighboring counties. Additionally, the project expanded bridges, installed new entrance/exit ramps, upgraded traffic signals, improved drainage for stormwater runoff, and this stretch of E-470 received fresh asphalt to provide a smoother ride.


Construction on the next phase of road widening is anticipated to begin in summer 2022 and will continue from I-70 to 104th Avenue to prepare for population growth in this part of the region. Along this 11-mile stretch of E-470, a third travel lane will be added in each direction to continue providing people with a quick, reliable commute with new developments planned. Additionally, the project will include an extension of the High Plains Trail from 26th to 64th Avenues within the City of Aurora and Adams County.


E-470 will also partner with member jurisdictions on other enhancements from I-70 to 104th Avenue that will accommodate the rapid development in northeastern Aurora and improve the flow of traffic, which includes:

  • Adding new interchanges at 38th Avenue and at 48th Avenue
  • Expanding the existing interchange at 64th Avenue and widening the bridge over E-470 as new development moves toward the airport, just east of the Gaylord Rockies Resort and Convention Center
  • Building a collector road at the E-470 northbound interchange with Pena Boulevard (similar to the southbound Pena interchange), which will enhance safety by separating traffic on the interchange from mainline through-traffic.


Crews will work in phases, beginning at the southern end of E-470 from I-70 to 64th Avenue. As the project gets underway, E-470 will notify its customers in advance about potential travel impacts. The work is anticipated to be complete by the end of 2024.

More About Completed Widening: Quincy Ave. to I-70

Fun Facts:

• More than 7,200 cubic yards of structural concrete was poured.
• 180,000 tons of asphalt was rolled out
• 15 miles of new or reset wildlife fencing was installed along the roadway to reduce vehicle-wildlife crashes on the roadway
• 800,000 cubic yards of earthwork was completed.

The project spanned over two years for a total cost of $94.4 million, which was under budget and funded from Authority capital reserves as planned. Watch the video below to learn more!

Related Information

Quincy Ave./Gun Club Road Intersection Improvements

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Driving E-470

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