Cathy Campbell did a double-take and tapped the brakes when she spotted what appeared to be a pointy-edged box lying in the road just ahead.
She got fooled.
It was a fake speed bump, a flat piece of blue, white and orange plastic that is designed to look like a 3-D pyramid from afar when applied to the pavement.
Assuming that what's shown in the picture is what's being discussed in the article, the speed bumps appear to be prisms, not pyramids.
Update: If that link goes away, try this one.