Quixote Corporation
Manufactures impact-absorbing highway and truck-mounted crash cushions, vehicle arresting systems, and related highway safety products, including highway advisory radio systems to inform motorists of accidents and traffic delays. (Nasdaq: QUIX).
http://www.quixotecorp.com/

Highway Safety Systems Ltd.
Supply reflective and anti-corrosion treatments for highway safety barriers. Also supply highway measuring systems and preformed road markings. Features product overviews and photographs.
http://www.highwaysafety.co.uk/

Milestones For U.S. Highway Transportation and the Federal Highway Administration
Illustrated time line of key events covering the period 1892 to 1996.
http://www.tfhrc.gov/pubrds/spring96/p96sp44.htm

FHWA
Federal Highway Administration who provide expertise, resources, and information to continually improve the quality of the nation's highway system and its intermodal connections.
http://www.fhwa.dot.gov/

American Society of Highway Engineers
American Society of Highway Engineers national website.
http://www.highwayengineers.org/

Highway Manufacturing
Highway Manufacturing models and specifications for pressure diggers
http://www.abm-highway.com/highhome.htm

USA - - Insurance Institute for Highway Safety
Independent, nonprofit, research and communications organizations funded by auto insurers and dedicated to reducing highway crash deaths, injuries and property losses.
http://www.hwysafety.org/

Highway Information Systems Inc.
QTT Inc. manufactures Highway Advisory Radio (HAR) systems, portable and permanent traffic counting systems, distance measuring instruments, Road / Runway Weather Information Systems (RWIS), fixed and mobile pavement sensors, and user-friendly software for the transportation industry.
http://www.highwayinfo.com/

General Highway Products, Inc.
Specialists in traffic signal systems & highway lighting since 1979.
http://www.generalhighwayproducts.com

Rock Carvings and Inscriptions Along the Karakorum Highway
After the construction of the Karakorum Highway, thousands of petroglyphs were discovered. Includes: an introduction, publications, bibliography, images, and links.
http://www.rzuser.uni-heidelberg.de/~u71/kara/welcome.html