Canada
Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island
Mexico
Baja Highways, BajaQuest -- General Information, Caminos De Mexico 1955, Modernization of the Main Highway System, The Baja Highway
United States
Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia
CANAMEX Trade Corridor
Transportation corridor connecting Canada, the United States, and Mexico.
Driving In The USA And Canada - Types Of Roads
Part of John Cletheroe's USA and Canada Holiday Hints. Resource about U.S. and Canada infrastructure written especially for British travellers.
Gribblenation.com
Extensive information primarily covering the eastern third of the continent.
Highway and Road Conditions for Canada and United
Organized by province/territory/state. Also includes weather, ferry, traffic and transit information.
Places 2 Ride
A guide to motorcycle destinations - scenic highways, backroads and trails.
Ratetheroads.com
A guide for conditions of facilities as rated by website visitors.
RoadTrip America
Various features including a forum, a list of scenic drives, a mobile Internet connection listing, and a gallery of unusual road signs, as well as other preparatory travel information.
The Expressway Site
Describes by state or province the highways which are high-speed divided thoroughfares with occasional at-grade intersections and no driveways.