| Interstate 225 | ||||
|---|---|---|---|---|
| East Denver Freeway | ||||
| Route information | ||||
| Maintained by CDOT | ||||
| Length: | 11.959 mi[2] (19.246 km) | |||
| Existed: | 1976[1] – present | |||
| Major junctions | ||||
| South end: | I-25 / US 87 in Denver | |||
| I-70 Bus. / US 40 / US 287 in Aurora | ||||
| North end: | I-70 / US 36 in Denver | |||
| Highway system | ||||
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Auxiliary route of the Interstate Highway System
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Interstate 225 (I-225) is a spur route of Interstate 25 in Colorado. It is the only auxiliary route of Interstate 25, and one of two in Colorado. I-225 traverses Aurora and small portions of Denver and Greenwood Village. It runs north from Interstate 25 to Interstate 70. It intersects with Interstate 70 Business/U.S. Highway 40/U.S. Highway 287, known locally as Colfax Avenue. Construction on the freeway began in 1964 and continued progressively through many years until final completion in 1976.
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The southern end of I-225 begins at an interchange with Interstate 25. The road then traverses from the southern end northeastward through southern Denver, with Cherry Creek State Park and Cherry Creek Lake on its east side.[3] After exits with DTC Boulevard and Yosemite Street in Greenwood Village,[4] a large suburb of the Denver-Aurora Metropolitan Statistical Area, the road traverses Aurora, where it interchanges with State Highway 83 at the northern boundary of Cherry Creek State Park. Following the exit at SH 83, the freeway enters a suburban area of Aurora,[5] where it turns northward and has exits at Iliff Avenue, Mississippi Avenue, and Alameda Avenue, also signed as State Highway 30.[6] After crossing Sand Creek, the freeway interchanges with Colfax Avenue, also signed as U.S. Route 40, U.S. Route 287 and Interstate 70 Business. After the exit, I-225 enters Adams County, continuing through the city of Aurora. The route then crosses a railroad[7] and reenters Denver, where it interchanges with Interstate 70 at its northern terminus.[2]
Construction on I-225 began in May 1964 at Interstate 70. A section from Colfax Avenue to Sixth Avenue was opened in 1966. Five years later, a segment between Mississippi Avenue and Parker Road was opened, and construction began on another segment south of Parker Road, completed in May 1975. The rest of the route between Yosemite Street and Interstate 25 was completed in May 1976.[1] Since completion of construction, the road has retained its original designation from I-25 to I-70.[5]
| County | Location | Mile[2] | Exit | Destinations | Notes |
|---|---|---|---|---|---|
| City of Denver |
0.00 | — | I-25 – Colorado Springs, Denver | Southbound exit and northbound entrance; signed as exits 0A (south) and 0B (north) | |
| Arapahoe |
Greenwood Village | 0.673 | 1 | DTC Boulevard, Tamarac Street | Signed as exit 1A southbound |
| Greenwood Village – Aurora |
1.333 | 1B | Yosemite Street | Southbound exit | |
| Aurora | 3.946 | 4 | SH 83 (Parker Road) | ||
| 5.373 | 5 | Iliff Avenue | |||
| 6.886 | 7 | Mississippi Avenue | |||
| 7.921 | 8 | Alameda Avenue | |||
| 8.953 | 9 | SH 30 (6th Avenue) | |||
| Adams |
9.901 | 10 | I-70 Bus. / US 40 (Colfax Avenue) / US 287 | ||
| 10.206 | 17th Place | New interchange in progress, will open in 2012[8] | |||
| City of Denver |
11.997 | 12 | I-70 / US 36 – Denver, Limon | Northbound exit and southbound entrance; signed as exits 12A (west) and 12B (east) | |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus • Closed/Former • Incomplete access • Unopened |
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