After many years of trying to encourage DeLorme to create a pro-trucking version of Street Atlas, I have come to the conclusion that DeLorme does not consider this option to be financially viable as a separate program.
Changes are now occurring in the trucking industry where they are considering requiring trucks to have gps and data available in all trucks to ensure that they don't accidentally end up on truck-restricted routes. While experienced professional drivers know most of the places where trucks cannot go, newer drivers aren't knowledgeable and distress levels over this are rising. This is sad since there are signs posted in advance of restricted roads and bridges that drivers are not reading.
I recommend that DeLorme consider creating a separate Data CD for separate purchase by Professional Drivers and RVers that would include the data that both these groups need:
low bridges and overpasses (height less than 13' 6")
weight limited bridges
truck restricted roads (e.g. parkways in the NE, dirt roads, roads cities don't want trucks on)
roads with length limitations on vehicles
roads with width limitations on vehicles.
roads that hazardous materials are not allowed on (including RV's with propane tanks)
Not only is the trucking industry likely to be required to have gps and mapping soon, there may be more RV's on the road soon full-timing. News reports today on TV indicate that many who cannot afford their mortgage are selling their home and moving into an RV to live in as their new home.
The CD could be made as a data adjunct for both Street Atlas and Topo, and probably also for the Xmap or other mapping created by DeLorme.
I LOVE Delorme's programs & helping people learn to use them.
I hope I've helped you! Please pass the favor on & help someone out too!