Part of the Center for Economic and Environmental Development at Allegheny College in Pennsylvania. Page shows recent projects including two involving the sculpting of road signs into art ("Read Between the Signs" and "Signs and Flowers").

Examples of child crossing, construction, and falling rock signs worldwide.

Illustrations and detailed commentary.

Humorous examples.

Photograph collection of warning signs.

Research project studying controls for this movement, addressing such principles as the "left-turn trap". Includes animated graphic examples.

Large collection of French road signs.

Chronicles the history and evolution of signs in the United Kingdom.

Many standard and unusual examples.

Contains hundreds of images from around the world.