Interstate 225 - Colorado
Routing
Interstate 225 connects Interstate 25 near the Denver Technology Center with Interstate 70 near the interchange with Pena Boulevard. Connected with Pena Boulevard, it is one of the fastest routes from the south suburbs to Denver International Airport (although E-470 offers competition). This is the only child route of Interstate 25.
Interstate 225 Colorado Highway Guides
History
Interstate 225 was constructed in stages between 1964 and 1976, starting at Interstate 70 and working its way gradually south. The specific milestone dates of the various segments are as follows:
- May 1964 - Segment from Interstate 70 interchange south to Colfax Avenue (U.S. 40-287 and Business Loop I-70) is under construction
- June 1966 - Segment from Colfax Avenue south to East Sixth Avenue opens
- 1969 - Mississippi Avenue Bridges constructed
- September 3, 1971 - segment from Mississippi Avenue south to Colorado 83 (Parker Road) opens
- May 27, 1975 - segment from Colorado 83 (Parker Road) southwest to Yosemite Street opens
- May 21, 1976 - final segment from Yosemite Street southwest to Interstate 25 and U.S. 87 opens
- October 1992 to September 1997 - Interstate 225 and Interstate 70 interchange reconstructed in stages
- October 1994 - widened to six lanes from Interstate 70 south to Smith Road
- November 1997 - widened to six lanes between Colfax Avenue and Sand Creek
- December 1997 - widened to six lanes between Sixth Avenue and Colfax Avenue
- September 2000 - construction begins on flyover ramp from northbound Colorado 83/Parker Road to southbound Interstate 225
- 2002 - Alameda Avenue interchange opens (after being approved by voters in November 1997)
- 2005 - widened to six lanes from Parker Road to Interstate 25 (part of T-REX project)
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