This custom integration will look at all device trackers for a particular person and combine them into a single person location sensor, sensor.<name>_location. Device tracker state change events are monitored rather than being polled, making a composite, averaging the states, or calculating a probability.
When a person is detected as moving between Home and Away, instead of going straight to Home or Away, this will temporarily set the person's location state to Just Arrived or Just Left so that automations can be triggered appropriately.
When the person location sensor changes it can be reverse geocoded using Open Street Map, Google Maps, or MapQuest and the distance from home (miles and minutes) calculated with WazeRouteCalculator.