There's also an off-road mode, which essentially gives you the option to switch over to Opera Mini for extra data compression for those times you need it -- this obviously comes in handy when you're reaching your data threshold or just in a low-reception area.
Within seconds, Drive automatically returns to the stock routing mode, zooming into the road you're on and placing useful information -- the current speed limit, distance to your next turn, the road you're on, etc.