Perhaps it's my lack of experience.
I ditched my 1390 and went for a Zumo because I can download routes. I made a route using Mapquest and sent it to my Zumo. Cool!
The problem? The Zumo changed the route to, I assume, be more efficient. I specifically don't want to travel on a particular highway. How can I tell the Zumo to NOT change the route I've downloaded?
Much thanks.