[jeffbee]

Google travel mode detection is pretty good about distinguishing between a car and a bus or train. I don't know if it comes from sensor data or radio data but Google reliably distinguishes between transit and car trips on my location history, whether I was carrying my iPhone or my Android. It also sometimes prompts me for "how crowded is/was the bus" when and only when I was riding a bus. This is an improvement over past behavior where Android would remind me where I parked ... the bus I rode earlier. I don't think current Google Maps will confuse a crowded bus and a traffic jam.