More road detail at lower zoom levels?

Hi, Is it possible to get more detail on City Navigator NT Maps at lower zoom levels? Currently minor roads and some villages don't show up until I'm at 0.2 Mile zoom, which means the total viewable area on my display is about 2 Miles and it's making plotting a route in unfamiliar areas really difficult as I can't see the complete picture until I zoom out again at, which point I loose the road/map detail.