Doh.

Oh, snap.

A new express bus ramp above Interstate 405 in Kirkland has cracked because of a design blunder, so it will need to be partly rebuilt at a cost of $2 million to $3 million.
...
The roadway cracked lengthwise where a wide concrete slab hangs partly over the freeway in what the DOT says is an innovative cantilevered design.

Like an overloaded teeter-totter, the slab cracked down the center and sagged an inch at one of its far ends...

"Innovative..." Heh.

(Mike Lindblom, Seattle Times, 02.02.2007)