Gribblenation.com  
   Extensive information primarily covering the eastern third of the continent.
   http://www.gribblenation.com/

CANAMEX Trade Corridor  
   Transportation corridor connecting Canada, the United States, and Mexico.
   http://www.canamex.org/

Highway and Road Conditions for Canada and United States  
   Organized by province/territory/state. Also includes weather, ferry, traffic and transit information.
   http://www.highwayconditions.com/

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.
   http://www.roadtripamerica.com/

Places 2 Ride  
   A guide to motorcycle destinations - scenic highways, backroads and trails.
   http://frontpage.tulsaconnect.com/maduko/

Ratetheroads.com  
   A guide for conditions of facilities as rated by website visitors.
   http://www.ratetheroads.com/

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.
   http://freespace.virgin.net/john.cletheroe/usa_can/driving/roads.htm

The Expressway Site  
   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/