I bought the Rand McNally trip-maker and street-finder at the Flying J in London for about $25 U.S. I think you could find a better software pckg. for trucks in particular, but this is o.k. You can cross-reference a route to the map and check for inadequate 2-lane roads. You can tailor it for your speeds and preferences, and the streetfinder can be handy, if you have time to look it up in advance. You can enter as many local areas into your hard drive as you want but will take more memory. Otherwise, you will need to pull out one of 4 CD's, plop it in, and then look up street. You could just load tripmaker if you want- did that on my home pc. Should be CA CD available- didn't think of that when I got it.