It would be great if waze would start downloading all the required map tiles when a route is entered.
The reasons for this are two fold:
first, in case there is no reception for part of the route
second, normally when a trip is started it will be in a location with good internet speed (either wifi or 3G), which may not be the case for the whole trip.
Stew Stryker commented
Yes please! I live and vacation in rural areas, and it's no fun to be on a trip, lose cell reception and have the map eventually go blank. I wouldn't even care if it didn't download all possible options, in case I got lost, or try to download the accident reports for the area (though that would be a bonus).
Google Maps now lets you download routes for when/if you lose connectivity. Waze should definitely match this feature! :-)
Caching route map tiles
Jaime Visser commented
What would work for both is this: A (lot) bigger cache (on SD, user configurable) and the option to preload a country/state/province. If waze has a data connection it can always update pieces of the map on the go.