A:AnswerI use mine in a RAM 3500, but I don't think this unit has the correct software for use in a SEMI. As far as bridge height, restricted weight roads and such. But it works great for the application I'm using it for.
A:AnswerUnits default to the best or fastest route available. However, you can use the built in route/trip planner app to customize a particular route if need be.
A:AnswerIn most cases it would work fine, but it doesn't route you on truck friendly routes. It doesn't route you around low bridges, or roads that are designated for trucks. I would recommend a Garmin for trucks.