For new drivers, the directions from some truck companies sent via Qualcomm can be difficult to follow. Especially when exit numbers and cities are not included.
Example: a trip from the copper mines in Morenci, AZ to the Phelps Dodge storage center in Norwich, CT might look like this: I-10, I-20, I-30, I-40, I-81, I-78, I-80, I-95, I-395.
Suggestion: You can find a ton of useful information and maps at the wikipedia website. Just search for "Interstate Highway System". Or use the following link:
http://en.wikipedia.org/wiki/Interstate_Highway_System
If you scroll to bottom of the site, there are links to maps and details for each
individual highway.
I found it helpful to print out the maps in color and save it for reference when building up my trips. And there are links to explain the state highway numbering system as well.
Of course, it is important to use the Trucker's Atlas (large print) to look for restricted and low clearance roads.