I find that 0.25 mile scale seems to retain all detail while allowing you to see what's around you. Aside from the detailed urban maps that are available for some larger cities, I'm wondering if I am indeed seeing ALL roads and details that are available. Can anyone confirm that 0.25 mile scale shows full detail? Anyone have a favorite scale for this type of environment, or others?

I keep mine on .25 and .50 for city driving.

If I'm on the interstate, I sometimes bump it up to .75 or 1.0 to see accidents and stuff up ahead.