AARoads: Private page covering numerous aspects.
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 States: Organized by province/territory/state. Also includes weather, ferry, traffic and transit information.
Milebymile: Route logs composed by tourist businesses located along the routes.
North America’s SuperCorridor Coalition, Inc.: Non-profit organization dedicated to developing a multi-modal transportation corridor within the continent. Includes maps.
Peter Creedon's House of Roads: Weblog rating facilities in Eastern Canada and the Northeastern U.S.
Places 2 Ride: A guide to motorcycle destinations - scenic highways, backroads and trails.
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.