Yes it's just navigation assistance, but if you're a truck driver (or any vehicles too large for normal road), you do not want to get stuck at underpass or tunnel or turn on roads too small and damaged it. I can't really "fully" test truck related restrictions in my area because there are no tunnels, no "small" roads and no time. You got truck restriction working in other proggy such as World and Basarsoft? I'm sure professional truck drivers use other reliable "truck navigation" product. You tried Sygic Truck yet?