Getting road speed (limits) information

[TIMAI2]

A community search returns this:

Location Sensor (Speed)

With App Inventor I tried to create a speedometer for my bicycle using the speed of the position sensor. When you move, the speedometer works well respecting the speed, but the problem is that when you stop, the speed doesn't always go to zero. This is a big problem because it increases the distance even if you stay still. What can be done to avoid it? Some idea?

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