Interstate 225

Interstate 225

Interstate 225 connects I-25 near the Denver Technology Center at Hampden South in the city of Denver with I-70 near the interchange with Pena Boulevard. The belt route circles northeast through the city of Aurora from Cherry Creek Reservoir and State Park to Adams County and the Denver city line at the Stapleton and Montbello areas. 2015 traffic counts along the commuter freeway range from 145,000 vehicles per day north of SH 30 (Exit 9) to 149,000 vpd by Cherry Creek Dam.

Interstate 225 Colorado Guides

Starting at I-70 and working gradually south, Interstate 225 was constructed in stages between 1964 and 1976. Specific milestone dates of the various segments are as follows:1

Additional widening, from July 2010 to Summer 2011, added a lane in each direction of Interstate 225 from E Mississippi Avenue (Exit 7) to E 2nd Avenue (just south of Exit 9). The $20.3 million project brought the suburban freeway to six overall lanes from Exit 7 north to I-70. The $43 million upgrade of the Colfax Avenue interchange was underway at the same time.2

Widening of the last four lane portion, from Exit 7 south to SH 83 (Exit 4), was completed in Fall 2014. The overall expansion of I-225 was designed to accommodate a new 10.5 mile long section of light rail (the R-line) through the corridor.3 The final segment of the 22 mile long R-line opened to the public in the city of Aurora on February 24, 2017.4

References:

  1. Interstate 225 - 50th Anniversary of the Interstate System. Colorado Department of Transportation (CDOT).
  2. "I-225: torn up so it can speed up - Two CDOT projects aim to ease traffic woes." Denver Post, The (CO), July 26, 2010.
  3. "Aurora light rail on track." Denver Post, The (CO), December 1, 2014.
  4. "R-Line ready for its rollout." Denver Post, The (CO), February 18, 2017.

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Page Updated Monday January 17, 2022.