I have a GO 510 with world maps. Whenever I travel, the device drives me into a route that not always is the best one. It often shows me routes thru dangerous mountains instead of the easy ones. I tend to ignore it and drive my own way using the device as an indication of where I am going. However, that is not the reason why I bought it. Can you tell me what is wrong with my TomTom GO 510 or what I am doing wrong_ Thanks.