The I-70 mountain corridor is a rather unusual piece of highway. As Ken Wissel, a transportation engineer with the Denver firm Stantec, who oversaw the project, describes it, I-70 has two of the highest peaks in the entire Interstate Highway system within 25 miles of each other. There are four major ascents, a two-mile-long tunnel that dips under the Continental Divide, a terrifying descent that features one of the country?s most-used emergency truck ramps, and a number of merge zones where traffic must jockey as the highway goes from three to two lanes before entering the tunnels. To complicate matters there?s snow, a lot of snow (?We had 600 inches last year,? Wissel says); and traffic, a lot of traffic.? ?We end up with some real long queues,? Wissel says. Backups as long as 30 miles have been reported.
Source: http://feeds.slate.com/click.phdo?i=27cfe6be5a5a12f237ad83f4e3873201
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