SPUI, shortcut, bridge opening for drivers in July at Cimarron/I-25
One is the single-point urban interchange (SPUI) design for the on/off-ramps; the second is the quadrant/”shortcut” southeast of Cimarron (Highway 24) and Eighth Street; and the third is the last “half” of the new interstate bridge over Cimarron.
(I-25 motorists are also being slowed through October by crews upgrading the overpass above Colorado Avenue, a Colorado Department of Transportation (CDOT) press release states.)
Meanwhile the overall schedule calls for completion by December. The contractor, Kraemer North America, started on the $113 million CDOT project in May 2015.
Here are the three new “experiences,” as summarized from information provided by CDOT officials:
- SPUI (opened at start of July, but not fully operational until fall) - With one less stoplight and “flatter” left-turn paths, project engineers say this
That earlier design had been approved but unfunded as part of the 2005-2007 COSMIX I-25 widening project.
The SPUI concept at the interchange grew out of the state's "Envision 24 West" planning effort between 2004 and 2012, which looked at moving Highway 24 traffic more efficiently from the interstate going west.
A similar SPUI design exists at the Garden of the Gods/I-25 interchange. A difference at Cimarron/I-25 is the three left-turn lanes for vehicles heading toward the mountains from the northbound off-ramp.
Note: Three features of Cimarron's SPUI are not yet complete. To be added in the weeks ahead at the southbound off-ramp are the second of two left-turning lanes for eastbound vehicles and a rightmost right-turning lane for westbound traffic. Also not yet built is the third lane for the northbound off-ramp's triple left.
- Quadrant/shortcut (opening mid- to late July) - As detailed in a previous Westside Pioneer article (at this link), CDOT believes this 800-foot road segment will divert traffic from the busy intersection of Eighth and Cimarron.
The shortcut will be governed by a stoplight at Cimarron and another where it lines up with the access to the Colorado Place shopping center.
- Cimarron/I-25 bridge (opening late July). In an overnight activity in mid-June (see Westside Pioneer article (at this link), Kraemer crews poured the concrete for the last 71- foot deck width on what will be a 151-foot wide interstate span above Cimarron.
The bridge will handle three lanes of traffic each way.
The first 80-foot width was completed last September. It is carrying all the I-25 traffic while the 71-footer is being readied.
The original bridge, built around 1960 for two lanes each way, was demolished last fall.
Westside Pioneer article