WorldNav Portable GPS based on TeleType's award winning navigation product line. This advanced touch screen Truck Routing GPS for professional truck drivers, bus drivers, and RV'ers. Insures that routes will follow roads that are suitable for truck travel, and yet the commercial driver can rely on the routing as it takes into account commercial truck restrictions such as bridge heights and clearances, load limits, one-way road designations, left-hand and dangerous turn restrictions, and allowances. For example, a typical set of restrictions for a semi-trailer could be entered as 13'6" height, 80,000 lb weight, 53' length, and 96" width. (teletype)