Make a feature for road rage mode. If I go to ‘Road rage mode’, the app adds in lead time on planned drives (extra 5 minutes for 10 miles or less, 10 minutes for 11-30 miles, etc..)
-Maybe avoids heavy traffic areas even if drive is longer.
-If user shows erratic increase in speed, excessive speeding, swerving, etc.. Have voiceover give safe driving or anger management techniques to lower road rage.
-Give safe driving or anger management tips periodically on drive.

I have road rage and millions of other drivers do as well. I think this feature could help alot of users like me to combat this potnentially dangerous issue.