4 links
Gribblenation.com
gribblenation.com
Extensive information primarily covering the eastern third of the continent.
Highway and Road Conditions for Canada and United States
highwayconditions.com
Organized by province/territory/state. Also includes weather, ferry, traffic and transit information.
The Expressway Site
expresswaysite.com
Describes by state or province the highways which are high-speed divided thoroughfares with occasional at-grade intersections and no driveways.