Google Maps Navigation has existed for almost seven years (and it's still beta), but Driving Mode is new. This feature was added early this year, but it was only available in a few countries. Google Maps Driving Mode now seems to be expanding across the globe.
Driving Mode is a bit like navigation without a set destination. You get the top-down navigation view with the arrow representing your car, but you just drive wherever you want. Maps will suggest destinations on the screen based on your past navigation history, though. It's a handy interface to keep an eye on road closures and traffic.
We've been tipped about driving mode rolling out in the Netherlands and Australia. We've also checked, and found it to be available in Lebanon. You can check in your own country simply by looking for Driving Mode in the navigation menu.