1. CatSynth.com - Highways

Contains commentary and information about various routes.

http://www.ptank.com/blog/category/highways/

2. CBRD - International

Page from Chris's British Road Directory illustrating the differences between roads in Great Britain and those in Andorra, Australia, Cuba, France, Iceland, Italy, Ireland, Mexico, Pakistan, Spain, and the United States.

http://www.cbrd.co.uk/reference/international/

3. Description of the World's Road Numbering Systems

Many details from nearly every country.

http://www.geocities.com/marcelmonterie/index3.htm

4. Jonathan's Photographs

Culled from various trips around the world.

http://winklers-roads.fotopic.net/

5. Mark Furqueron's Highway Page

Includncludes views mostly from the American West, predominantly California, as well as Asia and Europe. Includes pages on removed vintage signage.

http://members.cox.net/mkpl/road.html

6. Me and the Roads

Java game involving road-building.

http://www.kurumi.com/roads/matr/

7. Mike's Railroad Crossing Website

Covers the United States, Canada, the United Kingdom, and Australia. Also includes picture-taking guide, links, and FAQ.

http://www.rxrsignals.net/

8. Ratetheroads.com

A guide for conditions of facilities as rated by website visitors.

http://www.ratetheroads.com/

9. SABRE Photo Gallery

Contains examples from multiple continents, notably of Great Britain and Ireland.

http://www.sabre-roads.org.uk/gallery/

10. Trans Global Highway

Proposal by a private citizen to construct a global railroad and vehicle highway around the world including a tunnel under the Bering Strait from the United States to Russia, from Sakhalin in Russia to Hokkaido in Japan, and from Spain to Africa. Includes maps.

http://www.didik.com/highway/