McDonald's sundial billboard

I have to say, I really admire the creativity of this McDonald's billboard in Chicago. The ad agency and an engineer did a great deal of research to find the perfect location create the effect. The aluminum set of McDonald’s arches (which are 4 x 3.5 feet) casts a shadow on a different breakfast item each hour until noon when it casts an undistorted shadow on a sandwich, signaling lunchtime. It will be removed in August when the sun's position changes.

from Chicago Business:

"Designed by ad agency Leo Burnett with the input of an engineer, the billboard features a real sundial whose shadow falls on a different breakfast item each hour until noon, when the shadow of the McDonald’s arches are dead center.

The billboard, which went up near the intersection of Clark and Addison on Friday, is the latest in a campaign aimed at urging Chicagoans to turn to McDonald’s for breakfast."