Once it calculates the start time, you can set an alarm for the departure. As the hour approaches, Waze will automatically adjust it to account for real-time driving conditions (you can change the departure location any time). If you're okay giving the system access to your calendar and Facebook feeds, it can create planned drives for any pre-programmed events, too. As before, you can have it send alerts to other parties when you leave and add any stops for gas, coffee, etc. The update is now available on iOS and will arrive "soon" on Android.