This Garmin dēzl 770LMTHD 010-01343-00 GPS features lifetime map and traffic updates and customized routing based on the size and weight of your truck, so you can easily determine the appropriate route for travel.
The only flaw that I find with this GPS is that It routes you the long way to get to your destination. When it routes me to a destination that I already know the best route, it will route me through the Highway, when all I have to do is take a 5 minute route locally. It;s very frustrating when you are in a location you are not too familiar with it would route me the long way. The only way I know is that once I arrive at my destination, I would bypass a street that I could have taken for a shorter route.