Official document of the United Kingdom. Includes illustrations and usage of signs and signals.

Contains hundreds of images from around the world.

Java applet letting users create highway sign graphics.

The standard for signs, signals, and pavement markings in the United States. Includes HTML and .pdf versions.

What highway signs could look like.

Illustrations and detailed commentary.

Basic European signage.

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

Photos of and commentary on current and old signs and signals throughout the U.S. and Canada as well as welcome signs.

Generates graphic route markers.

Many standard and unusual examples.

Photograph inventory of a large personal collection.

Many humorous road signs.

Humorous examples.

Hundreds of funny road signs by category

Large collection of French road signs.

Most Italian road signs.

Extensive photo collection of australian signs.

Some images of Chinese signs, but the text is in Chinese.

In Icelandic but some interesting sign variations.

A few good pictures of Korean signs and signals.

Images of common road signs.

Images of most Lebanese signs.

Images and descriptions of most Italian signs.

Dozens of variations on the "Men at Work" theme.

Three pages of Japanese signs with English descriptions.

Images of Italian signs with english descriptions.

Covers all 2-digit and major 3-digit U.S. Interstates and gives some explanation as to their selection. Transcription of an AASHTO document.

Tourist attraction composed of donated road signs. Site includes visiting information.

Gives the background on this feature in the Yukon Territory of Canada consisting of thousands of donated road signs.

Contains a list of all cities that use ramp metering systems.

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

Photograph collection. Also covers the Central and Capital/Adirondack regions of the state.

North Korean road signs.

Various graphic files of U.S. examples, some fictional.

Photograph collection of warning signs.

Describes the unique attraction signage on freeways of this Canadian province. Official page of the provincial Department of Transportation and Public Works.

Malaysia signs and signals.

Entries into a contest dealing with humorous alterations of photos. Also provides links to earlier Scary Signs galleries.

Advocacy group based in Washington, D.C., U.S. Site includes news, events, articles, and links.

International overview, emphasizing the Vienna Convention of 1968 standardizing traffic control. Thorough links section.

Unofficial traffic signal simulator available for download. Uses Java.

A private citizen's presentation on having this feature adopted.

Photos of approach, advance direction, exit, reassurance, and overhead signs on motorways in various countries.

Texas Transportation Institute page. Includes historical and research documents.

Website that accepts submissions of photographs of sign assemblies whose numbers can be arranged to form a mathematical operation.

A comprehensive listing of those most commonly used in the United States.

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").

The standard for signs, signals, and pavement markings in the United Kingdom. Includes graphics.

Photos of an extensive collection of signals and signs, many vintage, plus a gallery of photos covering many geographic areas.

Photos of signs from the early 20th century.

Collection of news, webmaster's thoughts, and photographs.

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