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

Highway Route Markers
Contains hundreds of images from around the world.

SignMaker
Java applet letting users create highway sign graphics.

Manual on Uniform Traffic Control Devices
The standard for signs, signals, and pavement markings in the United States. Includes HTML and .pdf versions.

The Great International Highway Makeover
What highway signs could look like.

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

German Traffic Signs, Signals, and Markings
Illustrations and detailed commentary.

Roadsigns and Signals
Basic European signage.

Bartolomeo: Traffic Signs of the World
Examples of child crossing, construction, and falling rock signs worldwide.

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

Old California Traffic Signs
Photos of signs from the early 20th century.

Shields Up!
Generates graphic route markers.

Hawaii Road Sign Photos
Many standard and unusual examples.

My Crazy Hobby
Photograph inventory of a large personal collection.

Sign Language
Many humorous road signs.

Danny's Daily's The "Sign" Collection
Humorous examples.

Road Trip America Signs
Hundreds of funny road signs by category

France Road Signs
Large collection of French road signs.

Italian Road Signs
Most Italian road signs.

Australian Signs & Signals
Extensive photo collection of australian signs.

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

Icelandic Road Signs
In Icelandic but some interesting sign variations.

Traffic Signs in Seoul Korea
A few good pictures of Korean signs and signals.

New Zealand Road Signs
Images of common road signs.

Traffic Signs in Lebanon
Images of most Lebanese signs.

Road Signs in Italy
Images and descriptions of most Italian signs.

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

Dutch Traffic Signs
Good collection of Dutch Traffic signs.

Japanese Traffic Signs
Three pages of Japanese signs with English descriptions.

Italian & International Road Signs
Images of Italian signs with english descriptions.

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

Sign Post Forest in Germany
Tourist attraction composed of donated road signs. Site includes visiting information.

Watson Lake Sign Post Forest
Gives the background on this feature in the Yukon Territory of Canada consisting of thousands of donated road signs.

Arts and Environment Initiative
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").

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

Evaluation of Traffic Signal Displays for Protected/Permitted Left-Turn Control
Research project studying controls for this movement, addressing such principles as the "left-turn trap". Includes animated graphic examples.

Western New York Signals
Photograph collection. Also covers the Central and Capital/Adirondack regions of the state.

Road Signs of DPRK
North Korean road signs.

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

Road Sign Images
Various graphic files of U.S. examples, some fictional.

Diamond Signs
Photograph collection of warning signs.

The Traffic Signs Regulations and General Directions 2002
The standard for signs, signals, and pavement markings in the United Kingdom. Includes graphics.

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

Traffic & Road Signs in Malaysia
Malaysia signs and signals.

Worth1000.com - Scary Signs 4
Entries into a contest dealing with humorous alterations of photos. Also provides links to earlier Scary Signs galleries.

The National Campaign to Stop Red Light Running
Advocacy group based in Washington, D.C., U.S. Site includes news, events, articles, and links.

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