Part of John Cletheroe's USA and Canada Holiday Hints. Resource about U.S. and Canada infrastructure written especially for British travellers.
http://www.johncletheroe.org/usa_can/driving/roadind.htm - New window - Cached - Archive -
Describes by state or province the highways which are high-speed divided thoroughfares with occasional at-grade intersections and no driveways.
http://www.expresswaysite.com/ - New window - Cached - Archive -
Organized by province/territory/state. Also includes weather, ferry, traffic and transit information.
http://www.highwayconditions.com/ - New window - Cached - Archive -
Non-profit organization dedicated to developing a multi-modal transportation corridor within the continent. Includes maps.
http://www.nascocorridor.com/ - New window - Cached - Archive -