Interstate 270 (Colorado)
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_map_zoom.svg)
Map of the Denver area with I-270 highlighted in red
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| Route information | ||||
| Maintained by CDOT | ||||
| Length: | 7.107 mi (11.438 km) | |||
| Existed: | 1965 – present | |||
| Major junctions | ||||
| West end: |
  I-25 / US 36 in Welby
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 I-76 in North Washington   US 6 / US 85 / SH 2 at Commerce City
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| East end: |
 I-70 / US 36 at Denver
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| Highway system | ||||
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Colorado State Highways
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Interstate 270 (I-270) is a 7-mile-long (11 km) highway in the northeastern part of the Denver–Aurora Metropolitan Area in the U.S. state of Colorado. It overlaps U.S. Highway 36 (US 36) for its entire length. The western terminus of I-270 is at the interchange with I-25 and US 36. It heads eastward to an interchange with I-76, where the mileposts reset because of a previous freeway extension. The freeway heads southeast and comes to meet Vasquez Boulevard, where it enters Commerce City. The road crosses Quebec Street before ending at I-70.
Ground was broken on the first segment of I-270 in 1965, and the freeway was completed three years later, stretching from I-70 to Vasquez Boulevard. The road was then extended to I-76 two years later. The section between I-25 and I-76 was completed in 1999. Since completion, this section has undergone much construction to renew bridges over Clear Creek and Washington Street. Because the western end of I-270 is close to the junction of I-25 and I-76, some traffic movements to I-25 can only be made by using I-76.
I-270 begins at an interchange with I-25 in Welby, and is concurrent with US 36. The speed limit through the first section is 45 mph (72 km/h). The freeway heads southeastward for about one mile (1.6 km), crossing over Washington Street and State Highway 224 (SH 224), but access is not provided to either road. Mileposts along I-270 reset to zero at the I-76 interchange because it was the original western end of the Interstate. Since the I-76 interchange is close to both I-270's western end and to the I-25 / I-76 interchanges, some movements in the interchange are missing. Eastbound I-270 traffic cannot access westbound I-76, nor can eastbound I-76 traffic access westbound I-270. However, traffic on I-25 can access both westbound I-76 and eastbound I-270, thus completing the missing movements. The three interchanges work together by eliminating bottlenecks caused by redundant interchanges.
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Wikipedia