Smart Alarm Clock using Traffic Data
Waze should have alarm clock functionality so that if your daily commute is expected to take 20 minutes longer than normal because of traffic then it will wake you up 20 minutes early. Or this could be a separate app that uses Waze's traffic flow data. This would be especially useful to those of us that live in areas where snowstorms can wreak havoc with traffic flows.

Great thinking! The issue you raised has been addressed in a recent redesign. Hope you like it!
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Dawn commented
Yes, yes, yes! And let me sleep in a bit when traffic is lighter than normal! You never know when unpredictable events happen over night so this helps mitigate disruption with our morning routine.
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Scott commented
I would add to this where you put in how much time it takes you to get ready for work, say 45 min. Then the app will know based upon time it takes to prepare, and traffic conditions when it's time to get up and get moving.