Eric,
Thanks for your reply. This truck data is newly obtained by Naviteq (Oct 2005). Check out the link below. It describes the designated streets, etc. defined by 12 states to manage large truck traffic:

http://locationintelligence.net/news/12808.html

It would be great if MS WebServices provided a new SegmentPreference called something like "TruckRoute" which could be used, for example, in place of "Quickest" in the method below:

rt = RouteService.CalculateSimpleRoute(arrLatLong, MapPointUtils.DEFAULT_DATA_SOURCE, SegmentPreference.Quickest );

After posting this on several sites, my question is evolving to: "How do I directly access the Naviteq data?"

Thanks,
Jeff

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Jeff