Reduce the range of angles over which the application says "U-turn".

Today, this range is quite wide. For example, if the right direction is straight ahead at 0°, the app starts beeping if you deviate more than 15°, and says U-turn from 120°.
So the app says "U-turn" on a third of the angles behind the user. I suggest reducing this range to a tenth, so that the app only says "U-turn" when you're actually going the wrong way.