Logging Options on Waze (distance, driving time, gas costs)
It would be great that Waze could log some data about your trip.
So you could include a kind of dashboard that could display your speed, average speed, distance driven, a kind of trip distance resetable by user, as well a fuel logging calculator.
The fuel logging calculator should enable you to register the price spent and the ammount of fuel you've filled. This would be great for drivers to make some stats in order to reduce costs.