Photos: Meet the Eisenhower Tunnel crew trying to prevent you from getting stuck in gridlock

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The 1.7-mile tunnel on I-70 -- located sixty miles west of Denver at 11,155 feet above sea level -- saw a record high of 11,735,362 vehicles in 2009. That number dropped to 11,391,704 in 2010 and to 10,760,470 in 2011. The total from last year is actually lower than the total in 2005 (see counts for the past ten years below).

"We started wondering about it," says John Wilson, a tunnel supervisor for sixteen years. "Our biggest months are in the summer and those have been lower a little bit."

The Colorado Department of Transportation's first guess was that fewer people were skiing or vacationing in the mountains because of the recession. But when traffic counts continued to decline even as the economy recovered slightly, their answer became more complicated.

"The resorts are still getting good bookings, but the number of cars is going down," Wilson says. "That indicates carpooling."

Mike Salamon, a superintendent at the tunnel, adds, " was just a steady increase of about 3 percent. I think [it's] due to fuel costs and the economy, and I think we're seeing in the wintertime a little bit more carpooling."

While the numbers have dropped a bit, that doesn't make the job maintaining the tunnel and monitoring thirty large screens any easier for the fifty employees who rotate through on a 24/7 basis. The tunnel and the one-acre attached control room are cut off from emergency services in either direction. That means the tunnel must be self-sufficient in many respects. It has its own water treatment facility and fire emergency equipment.

"We still have the same challenges," Wilson says.

Page down to see more photos from inside the control room and more traffic count data.
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Sam Levin
Contact: Sam Levin