Asian Highway Network: Network designed by the United Nations. Site includes history, maps, and photography.
Asian Roads: Details and photos from a 2001 trip.
Intertoll: Maintains toll roads in Asia and Africa.
Korea Highway Corporation: Deals with construction, repair and maintenance, toll collection, development of areas by expressways, and related information. Includes details about a revised route numbering system.
Metropolitan Expressway Company Limited: Covers metropolitan Tokyo, Japan. Site includes toll information and service area facility information.
National Highways Authority of India: Official site. Includes news, maps, and road network information.
Taiwan Area National Freeway Bureau: Maintainer. Site includes map, construction information, and traffic status.
Utilities - Maps of India: Information about India's national highways.