Friday, May 12, 2006

Denver's Mousetrap Gets Bigger and Better With a Single Point Urban Interchange


Spuihigh
Video sent by clespinoza

Coming Soon to a Congested Intersection Near You

Traveling to Denver anytime soon?
Denver has revamped the I-25 on and off-ramps at University Boulevard at a scale that dwarfs smaller-town squawk about traffic circles. It's called the Single Point Urban Interchange and was recently featured in the Denver Post. Traffic engineers call it a SPUI (pronounced "spew-ee"), and despite its looks, this design promises to improve traffic congestion at high-volume intersections.

This video introduces motorists to the new and possibly unfamiliar way of entering and exiting interstate highways.



Missouri State Department of Transportation

The SPUI interchange design bears an uncanny resemblance to the plastic race tracks boys use to send die-cast metal cars careening through intersections at each other. Signal lights control traffic movement through the intersection of on and off ramp lanes.

The City of Grand Junction has considered adding a SPUI to the 29 Road/I-70 Business Loop design. However, the design's disadvantages in this setting resulted in a finding of "no further consideration." While the engineers found that the design would handle traffic flow more efficiently than a diamond intersection, a wider bridge would be needed at significant additional cost. Moreover, the intersection's physical setting was not compatible with the design.